– 39 –
Pin No.
Pin name
I/O
Description
46
PLL DATA
O
Serial data output to PLL and EEPROM.
47
EEP CS
O
Chip select signal output for EEPROM.
48
DTMF 2
O
DTMF 2 signal output.
49
–——––––––––––––––––
—
Not used (OPEN).
50
CONF
O
CONF select signal output.
51
INTCOM
O
INTERCOM select signal output.
52
SPK 1 EN
O
Line 1 speaker on/off signal output.
53
SPK 2 EN
O
Line 2 speaker on/off signal output.
54
L1 EN
O
Line 1 select signal output.
55
L1 EN
O
Line 2 select signal output.
56
DTMF EN
O
Chip enable output for DTMF.
57-60
D0-3
O
Serial data output for tone frequency select.
61-64
COL 0-3
O
Key scan signal output to key matrix.
65-70
ROW 0-5
I
Key scan signal input from key matrix.
71
–——––––––––––––––––
—
Not used (OPEN).
72
CRADLE DET
I
Handset unit on or off cradle detect input.
73
LINE 1 LED
O
LINE1 LED drive signal output.
74
CHARGE LED
O
CHARGE LED drive signal output.
75
INTCOM LED
O
INTERCOM LED drive signal output.
76
MUTE LED
O
MUTE LED drive signal output.
77
LINE 2 LED
O
LINE2 LED drive signal output.
78
–——––––––––––––––––
—
Not used (OPEN).
79
–——––––––––––––––––
—
Not used (OPEN).
80
KEY TONE ATTN
O
Beep tone attenuator control output.
Summary of Contents for SPP-M937
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