Pioneer GM-9027ZT/UC Service Manual page 37

5
7.2 IC
- Pin Functions (PD5791B)
Pin No. Pin Name
1 MUTE
2 VCS2
3 VCS1
4 VDT
5 VCK
6 CVNSS
7 MODEL0
8 NC
9 RESET
10 XOUT
11 VSS
12 XIN
13 VCC
14 NMI
15 SPEED
16 BSENS
17 ASENS
18 AVCINT
19 NC
20 AVCPW
21 PEE
22 AVCIN
23 AVCOUT
24 DSPOUT
25 DSPIN
26 DSPCK
27 TESTIN
28 TSOUT
29 TSIN
30 TSCK
31 SMUTEIN
32-62 NC
63 POS
64 CALIB
65 PWSENS
66 SYSPW1
67 DSPRST
68 DSPERR
69 DSPCS2
70 DSPCS1
71 DSPACK
72 DSPCD
73 DPD
74 ASLIN1
75 AVSS
76 ASLIN2
77 VREF
78 AVCC
79 NAVMUTE
80 DSPMUTE
*PD5791B
21
40
5
6
I/O Format Function and Operation
O C Mute output
O C SN761029 strobe output
O C PM0017AM strobe output
O C Data output for electronic volume
O C Clock output for electronic volume
Connect to VSS
I R handle /L handle select input
Not used
I Reset input
O Crystal oscillating element connection pin
GND
I Crystal oscillating element connection pin
5V
Connect to VCC
I Speed sensor pulse input
I Back up power sense input
I ACC power sense input
I AVC-LAN data input
Not used
O C AVC-LAN driver power supply output
O C Beep tone output
I AVC-LAN data input
O C AVC-LAN data output
O C DSPI/F serial data output
I DSPI/F serial data input
O C DSPI/F serial clock output
I Test program start input
O C Test serial data output
I Test serial data input
I Test serial clock input
I System mute input
Not used
I POS disable terminal
O C Power IC control output
I Power IC heat sense input
O C System power output
O C DSP hard reset output
I DSP error detect input
O C TC9332F chip select 2
O C TC9332F chip select 1
I DSP-IC ACK input
O DSP command/data output
O C AD/DAC calibration output
I Difference of noise and signal input 1
VSS
I Difference of noise and signal input 2
I A/D converter reference voltage input
VCC
I Navigation mute input
O C DSP mute output
80
IC's marked by * are MOS type.
Be careful in handling them because they are very
liable to be damaged by electrostatic induction.
Format
C
61
GM-9027ZT/UC
6
7
Meaning
C MOS
7
8
A
B
C
D
E
F
37
8