PT6808 Service Manual
30
AUXRXD
I
External serial port input
31
PLLUL
I
PLL check input
32
CMX-DATA
O
Consistent data output
33
TXD
O
Serial port output (e.g. PC)
34
RXD
I
Serial port input (e.g. PC)
35
AFDAT
O
FFSK data output
36
PTT
I
PTT key input
37 RDY
-
NC
38 ALE
-
NC
39 HOLD
-
NC
40 HLDA
-
NC
41 BLCK
-
NC
42
RD
-
Flash memory RD bus
43 BHE
-
NC
44
WR
-
Flash memory WR bus
45
DTMCLK
O
DTMF decoding chip clock output
46
CNTCLK
O
Common clock output
47
PLLSTB
O
PLL chip data gate output
48
CSO
O
Flash memory chip valid
49 A19
-
NC
50-59
A9-A18
-
Flash memory address bus
60 VCC
-
+5V
61
A8
-
Flash memory address bus
62
VSS
-
GND
63-70
A0-A7
-
Flash memory address bus
71 MONI
I
Monitor
switch
input
72
SHIFTCLK
I
Shift clock input
73
DTMFPD
O
DTMF gate chip
74
EN1
I
Encoding pulse input 1
75
MINDAT
O
Common data input
76
KEY2
I
Key press scan input 2
77
KEY1
I
Key press scan input 1
78
RESET
O
Key press scan IC reset output
