Table of Contents
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Pin No.
Pin name
46
PLL DATA
47
EEP CS
48
DTMF 2
49
–——––––––––––––––––
50
CONF
51
INTCOM
52
SPK 1 EN
53
SPK 2 EN
54
L1 EN
55
L1 EN
56
DTMF EN
57-60
D0-3
61-64
COL 0-3
65-70
ROW 0-5
71
–——––––––––––––––––
72
CRADLE DET
73
LINE 1 LED
74
CHARGE LED
75
INTCOM LED
76
MUTE LED
77
LINE 2 LED
78
–——––––––––––––––––
79
–——––––––––––––––––
80
KEY TONE ATTN
I/O
O
Serial data output to PLL and EEPROM.
O
Chip select signal output for EEPROM.
O
DTMF 2 signal output.
—
Not used (OPEN).
O
CONF select signal output.
O
INTERCOM select signal output.
O
Line 1 speaker on/off signal output.
O
Line 2 speaker on/off signal output.
O
Line 1 select signal output.
O
Line 2 select signal output.
O
Chip enable output for DTMF.
O
Serial data output for tone frequency select.
O
Key scan signal output to key matrix.
I
Key scan signal input from key matrix.
—
Not used (OPEN).
I
Handset unit on or off cradle detect input.
O
LINE1 LED drive signal output.
O
CHARGE LED drive signal output.
O
INTERCOM LED drive signal output.
O
MUTE LED drive signal output.
O
LINE2 LED drive signal output.
—
Not used (OPEN).
—
Not used (OPEN).
O
Beep tone attenuator control output.
– 39 –
Description
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