TCM4400
Data Manual
GSM/DCS Baseband and Voice A/D D/A Interface
Circuit
SLWS029B
January 1998
Printed on Recycled Paper
IMPORTANT NOTICE
Texas Instruments (TI) reserves the right to make changes to its products or to discontinue any semiconductor
product or service without notice, and advises its customers to obtain the latest version of relevant information
to verify, before placing orders, that the information being relied on is current.
TI warrants performance of its semiconductor products and related software to the specifications applicable at
the time of sale in accordance with TI's standard warranty. Testing and other quality control techniques are
utilized to the extent TI deems necessary to support this warranty. Specific testing of all parameters of each
device is not necessarily performed, except those mandated by government requirements.
Certain applications using semiconductor products may involve potential risks of death, personal injury, or
severe property or environmental damage ("Critical Applications").
TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, INTENDED, AUTHORIZED, OR WARRANTED
TO BE SUITABLE FOR USE IN LIFE-SUPPORT APPLICATIONS, DEVICES OR SYSTEMS OR OTHER
CRITICAL APPLICATIONS.
Inclusion of TI products in such applications is understood to be fully at the risk of the customer. Use of TI
products in such applications requires the written approval of an appropriate TI officer. Questions concerning
potential risk applications should be directed to TI through a local SC sales office.
In order to minimize risks associated with the customer's applications, adequate design and operating
safeguards should be provided by the customer to minimize inherent or procedural hazards.
TI assumes no liability for applications assistance, customer product design, software performance, or
infringement of patents or services described herein. Nor does TI warrant or represent that any license, either
express or implied, is granted under any patent right, copyright, mask work right, or other intellectual property
right of TI covering or relating to any combination, machine, or process in which such semiconductor products
or services might be or are used.
Copyright
1998, Texas Instruments Incorporated
iii
Contents
Section
Title
Page
1
Introduction
11
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.1
Features
11
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2
Functional Block Diagram
12
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3
Terminal Assignments
13
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4
Terminal Functions
14
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2
Electrical Specifications
21
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1
Absolute Maximum Ratings Over Operating Free-Air Temperature Range
21
. . . .
2.2
Recommended Operating Conditions
21
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3
Electrical Characteristics Over Recommended Operating Free-Air Temperature
Range
21
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3.1 Digital Inputs And Outputs
21
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3.2 Voltage References
22
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3.3 Master Clock Input (MCLK)
22
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3.4 Baseband Uplink Path
23
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3.5 dc Accuracy Baseband Uplink Path
23
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3.6 Dynamic Parameters Baseband Uplink Path
23
. . . . . . . . . . . . . . . . . . . . . . .
2.3.7 Smoothing Filters Characteristics Baseband Uplink Path
23
. . . . . . . . . . . .
2.3.8 I and Q Channels Gain and Phase Matching Baseband Uplink Path
23
. .
2.3.9 Baseband Uplink Path Global Characteristics
24
. . . . . . . . . . . . . . . . . . . . . . . .
2.4
Timing Requirements of Baseband Uplink Path
24
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4.1 Programmable Delays Baseband Uplink Path
24
. . . . . . . . . . . . . . . . . . . . . .
2.4.2 Fixed Delays Baseband Uplink Path
24
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4.3 Baseband Downlink Path
24
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4.4 dc Accuracy Baseband Downlink Path
25
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.5
Channel Characteristics
25
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.5.1 Frequency Response Baseband Downlink Path
25
. . . . . . . . . . . . . . . . . . . .
2.5.2 SNR vs Signal Level-baseband Downlink Path
25
. . . . . . . . . . . . . . . . . . . . . . .
2.5.3 Gain Characteristics of the Baseband Downlink Path
25
. . . . . . . . . . . . . . . . .
2.5.4 Group Delay Baseband Downlink Path
25
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.5.5 I and Q Channels Matching Baseband Downlink Path
26
. . . . . . . . . . . . . . .
2.5.6 Baseband Downlink Path Global Characteristics
26
. . . . . . . . . . . . . . . . . . . . .
2.6
Timing Requirements of Baseband Downlink Path
26
. . . . . . . . . . . . . . . . . . . . . . . . .
2.7
Automatic Power Control (APC)
26
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.7.1 APC Level (8-bit DAC)
26
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.7.2 APC Shaper (5-bit DAC)
26
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.7.3 APC Output Stage
27
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.8
Monitoring ADC
27
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.8.1 10-bit ADC
27
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.9
Automatic Gain Control (AGC)
27
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.9.1 AGC 10-bit DAC
27
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
iv
2.9.2 AGC Output Stage
28
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.10 Automatic Frequency Control (AFC)
28
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.10.1 AFC 13-bit DAC
28
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.10.2 AFC Output Stage
28
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.11 Voice Uplink Path
29
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.11.1 Global Characteristics of Voice Uplink Path
29
. . . . . . . . . . . . . . . . . . . . . . . . . .
2.11.2 Frequency Response of the Voice Band Uplink Path
210
. . . . . . . . . . . . . . . . .
2.11.3 Psophometric SNR vs Signal Level of the Voice Band Uplink Path
210
. . . . .
2.11.4 Gain Characteristics of the Voice Band Uplink Path
210
. . . . . . . . . . . . . . . . . .
2.12 Voice Downlink Path
211
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.12.1 Global Characteristics of Voice Downlink Path
211
. . . . . . . . . . . . . . . . . . . . . .
2.12.2 Frequency Response of the Voice Band Downlink Path
212
. . . . . . . . . . . . . .
2.12.3 Psophometric SNR vs Signal Level Downlink Path
212
. . . . . . . . . . . . . . . . . .
2.12.4 Gain Characteristics of the Voice Band Downlink Path
213
. . . . . . . . . . . . . . .
2.13 Power Consumption
214
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.13.1 Consumption by Circuit Block
214
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.13.2 Current Consumption for Typical Configurations
214
. . . . . . . . . . . . . . . . . . . .
2.13.3 MCU Serial Interface Timing Requirements
215
. . . . . . . . . . . . . . . . . . . . . . . . .
2.13.4 DSP Serial Interface Timing Requirements
215
. . . . . . . . . . . . . . . . . . . . . . . . .
2.13.5 Voice Timing Requirements
215
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3
Parameter Measurement Information
31
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1
Uplink Timing Considerations
31
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2
Downlink Timing Considerations
32
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3
Microcontroller Unit Serial Interface Timing Considerations
33
. . . . . . . . . . . . . . . . . .
3.4
DSP Serial Port Timing Considerations
34
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.5
Voice Band Serial Interface Timing Considerations
35
. . . . . . . . . . . . . . . . . . . . . . . . .
4
Principles of Operation
41
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.1
Baseband Uplink Path
41
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2
Baseband Downlink Path
43
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3
Auxiliary RF Functions
46
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3.1 Automatic Frequency Control (AFC)
46
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3.2 Auxiliary Analog Converter (Automatic Gain Control (AGC))
46
. . . . . . . . . . .
4.3.3 RF Power Control
47
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3.4 Monitoring
48
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.4
Voice Codec
48
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.4.1 Voice Uplink Path
49
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.4.2 Voice Downlink Path
49
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.5
DAI Interface
410
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.6
JTAG Interface
411
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.6.1 Standard User Instructions Available
411
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.7
JTAG Interface Scan Chain Descriptions
411
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.7.1 Bypass Register
411
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.7.2 Instruction Register
411
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.7.3 Identification Register
411
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.7.4 Boundary-Scan Register
412
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.8
Power-Down Functional Description
412
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.8.1
Direct Control with Internal Register
412
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
v
4.8.2
Radio Window Activation Control
413
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.8.3
External Terminal PWRDN Control
413
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.9
DSP Voice Band Serial Interface
413
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.10 Voltage References
414
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.10.1
MCU Serial Baseband Digital Interface
415
. . . . . . . . . . . . . . . . . . . . . . . . . . .
4.10.2
Serial Interface
415
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.10.3
DSP/MCU Serial Interface
416
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.10.4
DSP Serial Digital Interface
416
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.10.5
DSP/MCU Serial Interface Operation and Format
417
. . . . . . . . . . . . . . . . . .
4.10.6
DSP/MCU Serial Interface Registers
418
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.10.7
Baseband Uplink Ramp-delay Register
418
. . . . . . . . . . . . . . . . . . . . . . . . . . .
4.10.8
Baseband Uplink Data Buffer
419
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.10.9
Baseband Uplink I and Q Offset Registers
420
. . . . . . . . . . . . . . . . . . . . . . . .
4.10.10 Baseband Uplink I and Q D/A Conversion Registers
420
. . . . . . . . . . . . . . .
4.10.11 Power-Down Register 2
421
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.10.12 Power-Down Register No. 1
422
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.10.13 Baseband Control Register
422
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.10.14 MCU Clocking Schemes
423
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.10.15 Voice Band Uplink Control Register
423
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.10.16 Voice Band Downlink Control Register
425
. . . . . . . . . . . . . . . . . . . . . . . . . . .
4.10.17 Voice Band Control Register
426
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.10.18 Auxiliary Functions Control Register 1
427
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.10.19 Automatic Frequency Control Registers (1 and 2)
428
. . . . . . . . . . . . . . . . . .
4.10.20 Automatic Power Control Register
428
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.11 Automatic Frequency Control Registers (1 and 2)
429
. . . . . . . . . . . . . . . . . . . . . . . . .
4.11.1
AGC Control Register
429
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.11.2
Auxiliary Functions Control Register 2
429
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.11.3
Auxiliary A/D Converter Output Register
430
. . . . . . . . . . . . . . . . . . . . . . . . . .
4.11.4
Baseband Status Register
430
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.11.5
Voice Band Control Register 4 (Address 23)
431
. . . . . . . . . . . . . . . . . . . . . .
4.11.6
Baseband Uplink Register (Address 24)
432
. . . . . . . . . . . . . . . . . . . . . . . . . .
4.11.7
Power-On Status Register (Address 25)
432
. . . . . . . . . . . . . . . . . . . . . . . . . .
4.11.8
Timing and Interface
432
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5
MECHANICAL DATA
51
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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