EM78910/910A
8-bit Micro-controller
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* This specification are subject to be changed without notice.
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2001/01/12
I.General Description
The EM78910/910A is an 8-bit CID (Call Identification) RISC type microprocessor with low power, high
speed CMOS technology. This integrated single chip has on_chip watchdog (WDT), RAM, ROM, programmable real
time clock/counter, internal interrupt, power down mode, FSK decoder, Call waiting decoder, SDT (Stuttered dial tone)
decoder, DTMF generator, MEI (Multiple Extension Internetworking) function, RTF (Request To Flash) function and
tri-state I/O. The EM78910/910A provides a single chip solution to design a CID of calling message_display.
II. Feature
CPU
Operating voltage range : 2.5V5.5V
16K 13 Read Only Memory
1.1K 8 on chip RAM
Up to 28 bi-directional tri-state I/O ports
8 level stack for subroutine nesting
8-bit real time clock/counter (TCC)
Two sets of 8 bit counters can be interrupt sources
Selective signal sources and trigger edges , and with overflow interrupt
Programmable free running on chip watchdog timer
99.9 single instruction cycle commands
Four modes (Main clock 3.579MHz or 1.79MHz)
Set code option bit0(MCLK) : 0/1 ! 3.579MHz/1.79MHz
Mode
CPU status
Main clock
32.768kHz clock status
Sleep mode
Turn off
Turn off
Turn off
Idle mode
Turn off
Turn off
Turn on
Green mode
Turn on
Turn off
Turn on
Normal mode
Turn on
Turn on
Turn on
Ring on voltage detector
Universal Low battery detector
Input port wake up function
9 interrupt source , 4 external , 5 internal
Port key scan function
Clock frequency 32.768KHz
Eight R-option pins
CID
Bell 202 , V.23 FSK demodulator
DTMF generator
Ring detector on chip
CALL WAITING
Compatible with Bellcore special report SR-TSV-002476
Call-Waiting (2130Hz plus 2750Hz) alert signal detection
Good talkdown and talkoff performance
Sensitivity compensated by adjusting input OP gain
SDT
Stuttered Dial Tone (350Hz plus 440Hz) signal detection
MEI/RTF
Compatible with TIA/EIA-777(TIA SP-4078)
MEI(Multiplex Extension Internetworking) and RTF(Request To Flash) functions
PACKAGE
45-pin die form without MEI/RTF (EM78910AH, POVD disable)(EM78910BH, POVD enable)
47-pin die form with MEI/RTF (EM78910AAH, POVD disable)(EM78910ABH, POVD enable)
EM78910/910A
8-bit Micro-controller
__________________________________________________________________________________________________________________________________________________________________
* This specification are subject to be changed without notice.
~ ~
~ ~
~ ~
~ ~
2
2001/01/12
III. Application
1. Adjunct units
2. Answering machines
3. Feature phones
IV. Pin Configuration
45-pin die EM78910AH, EM78910BH
47-pin die EM78910AAH, EM78910ABH
Fig.1 Pin Assignment
NC
/RINGTIME
RDET1
RING
TIP
CWGS
CWTIP
AVDD
4
5
6
7
8
9
10
11
12
13
14
XIN
XOUT
NC
DTMF
PLLC
1
2
3
AVSS
P72/INT2
P73/INT3
P74
P75
36 37 38
39
40
41 42
43
44
45 46
P76
LBD/P77 /RESET
P96
P97
P70/INT0
P71/INT1
P90
P91
VDD1
P92
25
26
27 28 29 30 31 32 33 34 35
P93
P94 P95
P54
P55
P56
P57
P62
P63
P64
P65
15
16
17
18
19
20 21
22
23
24
P66
P67
DVSS
TEST
P60 P61
47
VDD
MEI
/RINGTIME
RDET1
RING
TIP
CWGS
CWTIP
AVDD
4
5
6
7
8
9
10
11
12
13
14
XIN
XOUT
RTF
DTMF
PLLC
1
2
3
AVSS
P72/INT2 P73/INT3
P74 P75
36 37 38
39 40 41 42 43 44
45 46
P76
LBD/P77 /RESET
P96 P97
P70/INT0 P71/INT1
P90 P91
VDD1
P92
25 26 27 28 29 30 31 32 33 34 35
P93 P94 P95
P54 P55 P56 P57
P62 P63
P64 P65
15 16 17 18 19 20 21 22 23
24
P66 P67
DVSS TEST
P60 P61
47
VDD
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