– 27 –
IC11 AM79C491JC-C09 (SYSTEM CONTROL)
(HANDSET SECTION)
Pin No.
Pin name
I/O
Description
1
AOP
O
Analog audio output terminal.
2
AON
O
Analog audio output terminal.
3
AIN
I
Analog audio input terminal.
4
AV
SS
1
–
Analog power supply (Ground).
5
CFILT
O
V
CC
dc bias filter terminal.
6
IREF
O
Current reference output terminal.
7
AV
CC
1
–
Analog power supply terminal.
8
TST1
I
Monitor discrimination terminal.
9
MODE 0
I
Established basic operating mode.
10
MODE 1
I
Established basic operating mode.
11
ROW 0
–
Key matrix scan input terminal.
12
ROW 1
I
Key matrix scan input terminal.
13
ROW 2
I
Key matrix scan input terminal.
14
ROW 3
I
Key matrix scan input terminal.
15
ROW 4
I
Key matrix scan input terminal.
16
COL 0
O
Key matrix scan output terminal.
17
COL 1
O
Key matrix scan output terminal.
18
COL 2
O
Key matrix scan output terminal.
19
COL 3
O
Key matrix scan output terminal.
20
COL 4
O
Key matrix scan output terminal.
21
DV
SS
1
–
Digital power supply terminal (Ground).
22
DV
CC
1
–
Digital power supply terminal (+3V).
23
ON-CARD
I
Charge ON detect terminal.
24
–
Not used (Open).
25
ATE EN
I
ATE enable input.
––––––––––––––––––––––––
26
LCD RESET
O
Reset signal output to the LCD driver (SED1235).
––––––
27
CS
O
Chip select output to the LCD driver (SED1235).
28
A0
O
Address bus output the LCD driver (SED1235).
29
DATA MON
I
Data input detect terminal.
30
NC
–
Not used (Open).
–––––––––––
31
PSEN
O
Chip enable and output enable output to the ROM (IC4).
(EXTERNAL ROM VERSION ONLY)
32
DV
CC
2
–
Digital power supply terminal (+3V).
33
DV
SS
2
–
Digital power supply terminal (Ground).
34
–
Not used (Open).
35
–
Not used (Open).
36
A14
–
Not used (Open).
37
ALE
O
Address latch enable output to the ROM (IC4). (EXTERNAL ROM VERSION ONLY)
38
A08
I/O
Address bus to the ROM (IC4). (EXTERNAL ROM VERSION ONLY)
39
A09
I/O
Address bus to the ROM (IC4). (EXTERNAL ROM VERSION ONLY)
40
A10
I/O
Address bus to the ROM (IC4). (EXTERNAL ROM VERSION ONLY)
Содержание SPP-M920 Primary
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