HYT TM-600 Service Manual page 23

13 XIN
14 VCC
15 P85/NMI
16 P84/INT2
17 P83/INT1
18 P82/INT0
19 P81/TA4in
20 P80/TA4out
21 P77/TA3in
22 P76/TA3out
23 P75/TA2in
24 P74/TA2out
25 P73/TA1in
26 P72/TA1out
27 P71/RXD2
28 P70/TXD2
29 P67/TXD1
30 P66/RXD1
31 P65
32 P64
33 P63
34 P62
35 P61
36 P60
37 P57
38 P56
39 P55
40 P54
41 P53
42 P52
43 P51
44 P50
45 P47
46 P46
47 P45
48 P44
49 P43
50 P42
51 P41
52 P40
53 P37
54 P36
55 P35
XIN I
VCC I
NMI I
AFRDF I
DTMFSTD I
AUX1 I/O
SBC
CTC_OUT O
SPMUTE O
CTC_PLL O
EMICC O
AFTDATA O
AFTCLK I
AFDIR O
RXD2 I
TXD2 I
TXD1 O
RXD1 I
AUX4 I/O
AUX5 I/O
TXD2 O
RXD2 I
MICDAT I/O
AUX2 I/O
RDY I
NC
HOLD
NC
NC
RD O
NC
WR O
HNC O
SHIFT O
W/N O
CS0 O
MicMute O
KEYBL O
UP/LED4 O
LED6 O
LCDCI/LED3 I/O
DOWN/LED5 O
LCDCL/LED2 O
TM-600 SERVICE MANUAL
Clock input
+5V
NMI, use or not
Baseband chip MSK receive detect (RDF/FD)
Unused (left open)
Optional circuit board port 1(input)
SB Power switch control
CDCSS Balance
SP Mute
CTCSS/CDCSS modulation output
External Mic control
Baseband chip MSK serial data (TDATA)
Baseband chip MSK serial clock (TCLK)
Baseband chip I/O control pin (DIR)
Unused
Unused
Serial data output
Palm Mic HOOK input/serial data input
AUX4— — optional circuit board port 5 (output)
AUX5— — optional circuit board port 6 (output)
Acc comm0 (serial data output)
Acc comm0 (serial data input)
Palm Mic key code data input/output
AUX2— — optional circuit board port 2 (input)
Pull Up
Unused (left open)
Unused (left open)
Unused (left open)
Unused (left open)
External expansion, read
Unused (left open)
External expansion, write
Horn alert control
Clock beat frequency
W/N switch W: L
NC (left open)
Mic mute Mute: L
Keypad backlight control
UP/LED4
LED6
LCD Driver CI PIN / LED3
DOWN/LED5
LCD Driver CL PIN/LED2
22
(renamed AUX1)
H: off L: on
Mute: H
External Mic: H (now NC)
PTT ON: L
On: L
(for recording)
(Unused )
(Unused )
On: H (Unused )
On: H
(change W to H)
(change to H active)
On: H (NC)