Copyright
Cirrus Logic, Inc. 1998
(All Rights Reserved)
CS4614
Preliminary Product Bulletin
CrystalClearTM
SoundFusionTM PCI Audio
Accelerator
FEATURES
s
255 MIPs SLIMD
TM
DSP Architecture
s
DirectX
TM
5.0 3D Positional Audio
s
Fat Labs
Approved 64-Voice Wavetable Synthesis
with Effects
s
NetMeeting
TM
AEC Hardware Acceleration
s
High Quality Hardware Sample Rate Conversion
(90+ dB Dynamic Range)
s
PC/PCI Legacy Support
s
DDMA Legacy Support
s
CrystalClear Legacy Support (CCLS
TM
)
s
PCI 2.1 Compliant PCI Interface
s
96 Stream DMA Interface with Hardware Scat-
ter/Gather Support
s
PCI Power Management (D0 through D3 Hot),
APM 1.2, and ACPI 1.0 Support
s
AC `97 2.0 Link Codec Interface
s
DirectInput
TM
Joystick Interface
s
MPU-401 MIDI Input/Output Interface
s
3.3 V Power Supply (5 V tolerant I/O)
DESCRIPTION
The CS4614 is a high performance pin-compatible
upgrade to the 100-pin CS4610/11 PCI audio ac-
celerator. With the added legacy compatibility
modes, the CS4614 enables real mode DOS com-
patible PCI-only audio subsystems. This device,
combined with application and driver software,
provides a complete system solution for hardware
acceleration of Windows 95
DirectSound
,
DirectSound3D
, DirectInput, and Wavetable Syn-
thesis. WDM drivers provide support for both
Windows 98 and Windows NT 5.0.
The CS4614 is based on the Cirrus Logic Crystal-
Clear Stream Processor (SP) DSP core. The SP
core is optimized for digital audio processing, and
is powerful enough to handle complex signal pro-
cessing tasks with ease. The SP core is supported
by a bus mastering PCI interface and a built-in
dedicated DMA engine with hardware scatter-
gather support. These support functions ensure
extremely efficient transfer of audio data streams
to and from host-based memory buffers, providing
a system solution with maximum performance and
minimal host CPU loading.
The all-digital CS4614 supports a variety of audio
I/O configurations including direct connection to
the CrystalClear CS4297 AC `97 Codec.
PC/PCI, DDMA, and CrystalClear Legacy support
provide PCI-only legacy games compatibility.
ORDERING INFORMATION
CS4614-CM 100-pin MQFP 20x14x3.07 mm
DS292PP3
JUN `98
CIRRUS LOGIC PRELIMINARY PRODUCT BULLETIN JUNE 30, 5:03 PM
2
CIRRUS LOGIC PRELIMINARY PRODUCT BULLETIN JUNE 30, 5:03 PM
DS292PP3
CS4614
CrystalClearTM SoundFusionTM PCI Audio Accelerator
ABSOLUTE MAXIMUM RATINGS
(PCIGND = CGND = CRYGND = 0 V, all voltages with respect to 0 V)
Notes: 1. Includes all power generated by AC and/or DC output loading.
2. The power supply pins are at recommended maximum values. XTALI & XTALO are at 3.6 V maximum.
3. At ambient temperatures above 70 C, total power dissipation must be limited to less than 0.4 Watts.
WARNING: Operation beyond these limits may result in permanent damage to the device.
Normal operation is not guaranteed at these extremes.
RECOMMENDED OPERATING CONDITIONS
(PCIGND = CGND = CRYGND = 0 V, all voltages with respect to 0 V)
Specifications are subject to change without notice.
Parameter
Symbol
Min
Typ
Max
Unit
Power Supplies
PCIVDD
CVDD
CRYVDD
VDD5REF
-
-
-
-
-
-
-
-
4.6
4.6
4.6
5.5
V
V
V
V
Total Power Dissipation
(Note 1)
-
-
1.5
W
Input Current per Pin, DC (Except supply pins)
-
-
10
mA
Output current per pin, DC
-
-
10
mA
Input voltage
(Note 2)
-0.3
-
5.75
V
Ambient temperature (power applied)
(Note 3)
-45
-
85
C
Storage temperature
-55
-
150
C
Parameter
Symbol
Min
Typ
Max
Unit
Power Supplies
PCIVDD
CVDD
CRYVDD
VDD5REF
3
3
3
4.75
3.3
3.3
3.3
5
3.6
3.6
3.6
5.25
V
V
V
V
Internal DSP Frequency
-
-
85
MHz
Operating Ambient Temperature
T
A
0
25
70
C
Windows, Windows 95, DirectSound, and DirectSound3D are registered trademarks of Microsoft Corporation.
DirectInput, DirectX and NetMeeting are trademarks of Microsoft Corporation.
Sound Blaster and Sound Blaster Pro are trademarks of Creative Technology, Ltd.
Crystal, CrystalClear, CCLS, SLIMD and SoundFusion are trademarks of Cirrus Logic, Inc.
All other names are trademarks, registered trademarks, or service marks of their respective companies.
DS292PP3
CIRRUS LOGIC PRELIMINARY PRODUCT BULLETIN JUNE 30, 5:03 PM
3
CS4614
CrystalClearTM SoundFusionTM PCI Audio Accelerator
AC CHARACTERISTICS (PCI SIGNAL PINS ONLY)
(T
A
= 70 C;
PCIVDD = CVDD = CRYVDD = 3.3 V; VDD5REF = 5 V; PCIGND = CGND = CRYGND = 0 V;
Logic 0 = 0 V, Logic 1 = 3.3 V; Reference levels = 1.4 V; unless otherwise noted; (Note 4))
Notes: 4. Specifications guaranteed by characterization and not production testing.
5. Refer to V/I curves in Figure 1. Specification does not apply to PCICLK and RST# signals. Switching
Current High specification does not apply to SERR# and INTA# which are open drain outputs.
6. Cumulative edge rate across specified range. Rise slew rates do not apply to open drain outputs.
7. Equation A: I
OH
= 11.9 * (Vout - 5.25) * (Vout + 2.45) for 3.3 V > Vout > 3.1 V
8. Equation B: I
OL
= 78.5 * Vout * (4.4 - Vout) for 0 V < Vout < 0.71 V
Parameter
Symbol
Min
Max
Unit
Switching Current High
(Note 5)
0 < Vout < 1.4
1.4 < Vout < 2.4
3.1 < Vout < 3.3
I
OH
-44
-
-
-
Note 7
mA
mA
Switching Current Low
(Note 5)
Vout > 2.2
2.2 > Vout > 0.55
0.71 > Vout > 0
I
OL
95
Vout/0.023
-
-
-
Note 8
mA
mA
Low Clamp Current
-5 < Vin < -1
I
CL
-
mA
Output rise slew rate
0.4 V - 2.4 V load
(Note 6)
slewr
1
5
V/ns
Output fall slew rate
2.4 V - 0.4 V load
(Note 6)
slewf
1
5
V/ns
44
Vout
1.4
0.024
---------------------------
+
25
Vin
1
+
0.015
-------------------
+
Pull Up
Pull Down
Equation B:
Equation A:
3.3
3.3
2.2
0.55
2.4
voltage
voltage
1.4
DC
drive point
DC drive
point
AC drive
point
I
= 11.9*(Vout-5.25)*(Vout+2.45)
for 3.3V > Vout > 3.1V
OH
I
= 78.5*Vout*(4.4-Vout)
for 0V < Vout < 0.71V
OL
AC drive
point
test
point
test
point
-2
3, 6
95
380
-44 Current (mA)
Current (mA)
-176
Figure 1. AC Characteristics
4
CIRRUS LOGIC PRELIMINARY PRODUCT BULLETIN JUNE 30, 5:03 PM
DS292PP3
CS4614
CrystalClearTM SoundFusionTM PCI Audio Accelerator
DC CHARACTERISTICS
(T
A
= 70 C; PCIVDD = CVDD = CRYVDD = 3.3 V; VDD5REF = 5 V;
PCIGND = CGND = CRYGND = 0 V; all voltages with respect to 0 V unless otherwise noted)
Notes: 9. The following signals are tested to 6 mA: FRAME#, TRDY#, IRDY#, DEVSEL#, STOP#, SERR#,
PERR#, and INTA#. All other PCI interface signals are tested to 3 mA.
10. Input leakage currents include hi-Z output leakage for all bi-directional buffers with three-state outputs.
11. For open drain pins, high level output voltage is dependent on external pull-up used and number of
attached gates.
12. Typical values are given as average current with typical SP task execution and data streaming. Current
values vary dramatically based on the software running on the SP.
Parameter
Symbol
Min
Typ
Max
Unit
PCI Interface Signal Pins
High level input voltage
V
IH
2
-
5.75
V
Low level input voltage
V
IL
-0.5
-
0.8
V
High level output voltage
Iout = -2 mA
V
OH
2.4
-
-
V
Low level output voltage
Iout = 3 mA, 6 mA
(Note 9)
V
OL
-
-
0.55
V
High level leakage current
Vin = 2.7 V
(Note 10)
I
IH
-
-
70
A
Low level leakage current
Vin = 0.5 V(Note 10)
I
IL
-
-
-70
A
Non-PCI Interface Signal Pins (Except XTALO)
High level input voltage
XTALI
Other Pins
V
IH
2.3
2
3.3
-
4.0
5.75
V
V
Low level input voltage
XTALI
Other Pins
V
IL
-0.5
-0.5
0
-
0.8
0.8
V
V
High level output voltage
Iout = -4 mA
(Note 11)
V
OH
2.4
-
-
V
Low level output voltage
Iout = 4 mA
V
OL
-
-
0.4
V
High level leakage current
Vin = 5.25 V
I
IH
-
-
10
A
Low level leakage current
Vin = 0
I
IL
-
-
-10
A
Parameter
Min
Typ
Max
Unit
Power Supply Pins (Outputs Unloaded)
Power Supply Current: VDD5REF
PCIVDD/CVDD/CRYVDD Total
(Notes 4,12)
-
-
0.6
164
-
TBD
mA
mA
Low Power Mode Supply Current
-
10
-
mA
DS292PP3
CIRRUS LOGIC PRELIMINARY PRODUCT BULLETIN JUNE 30, 5:03 PM
5
CS4614
CrystalClearTM SoundFusionTM PCI Audio Accelerator
PCI INTERFACE PINS
(T
A
= 0 to 70 C; PCIVDD = CVDD = CRYVDD = 3.3 V; VDD5REF = 5 V;
PCIGND = CGND = CRYGND = 0 V; Logic 0 = 0 V, Logic 1 = 3.3 V; Timing reference levels = 1.4 V)
Notes: 13. For Active/Float measurements, the Hi-Z or "off" state is when the total current delivered is less than or
equal to the leakage current. Specification is guaranteed by design, not production tested.
14. RST# is asserted and de-asserted asynchronously with respect to PCICLK.
15. All output drivers are asynchronously floated when RST# is active.
Parameter
Symbol
Min
Max
Unit
PCICLK cycle time
t
cyc
30
-
ns
PCICLK high time
t
high
11
-
ns
PCICLK low time
t
low
11
-
ns
PCICLK to signal valid delay - bused signals
t
val
2
11
ns
PCICLK to signal valid delay - point to point
t
val(p+p)
2
12
ns
Float to active delay
(Note 13)
t
on
2
-
ns
Active to Float delay
(Note 13)
t
off
-
28
ns
Input Set up Time to PCICLK - bused signals
t
su
7
-
ns
Input Set up Time to PCICLK - point to point
t
su(p+p)
10, 12
-
ns
Input hold time for PCICLK
t
h
0
-
ns
Reset active time after PCICLK stable
(Note 14)
t
rst-clk
100
-
s
Reset active to output float delay
(Notes 13, 14, 15)
t
rst-off
-
40
ns
PCICLK
t
rst-clk
RST#
OUTPUTS
Hi-Z
INPUTS
Valid
Input
t
on
t
off
t
su
t
h
OUTPUTS
Valid
t
val
t
rst-off
Figure 2. PCI Timing Measurement Conditions
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