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2 Pin Out Changes GM47/GM48 to GM47r5/GM48r5
2.1 GM47/GM48 Pinout
PU = Power Up
LZT 123 7733 R1A
Differences between GM47 and GM47r5
Default @ PU
Pin
1
3
5
7
9
11
I/P 100K 2V7
13
15
17
19
I/P 100K 2V7
21
I/P 100K 2V7
23
25
27
29
LO, pulse HI on
31
sound
LO, pulse HI on
33
LED on
LO, pulse 100ns
35
appears 9ms
after VIO
I/P 100K 2V7
37
I/P 100K 2V7
39
LO
41
0.7V for 9ms then
43
LO
LO
45
47
49
51
53
55
57
59
Signal Name
Signal Name
VCC
VCC
VCC
VCC
VCC
VCC
RESERVED
SIMVCC
SIMPRESENCE
SIMRST
SIMCLK
I/O1
I/O3
VRTC
ADC2
SDA
BUZZER
LED
TX_ON
DTR
IN5
RTS
TD
TD3
TD2
PCMULD
PCMDLD
PCMO
PCMSYN
PCMCLK
MICP
BEARP
AFMS
SERVICE
ATMS
Pin
Default @ PU
DGND
2
DGND
4
DGND
6
DGND
8
DGND
10
DGND
12
ON/OFF
14
16
SIMDAT
18
DAC
20
I/O2
22
I/P 100K 2V7
I/O4
24
I/P 100K 2V7
ADC1
26
ADC3
28
SCL
30
O5
32
HI for 10mS then LO
VIO
34
RI
HI for 350mS then
36
O6
LO for 350mS then
HI
HI for 350mS then
DCD
38
LO for 350mS then
O7
HI
CTS
40
Hi 397mS then LO
HI for 640ms then LO
RD
42
pulse for 13.3ms then
HI
HI but with LO pulses
RD3
44
then HI
HI for 9ms then LO
RD2
46
spikes/pulses e.g.
2µs Then HI
48
PCMI
50
52
MICN
54
BEARN
56
58
AGND
60
5
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