Pioneer KEH-P8800R-W/EW, Service Manual

Page: 59 / 68

59
KEH-P8800R,P8800R-W,P8850
BR9010FV
NC
VCC
CS
SK
WC
GND
DO
DI
1
2
3
4
8
7
6
5
CS
SK
DI
DO
WC : Chip select input
: Serial data clock input
: Serial data input
: Serial data output
: Write control input
-
Pin Functions (PD5471A)
Pin No. Pin Name I/O Format Function and Operation
1–4 NC Not used
5 REM I Remote control reception
6 BYTE I External data BUS width select input
7 CNVSS I Processor mode select input
8,9 NC Not used
10 RESET I Reset input
11 XOUT O Crystal oscillating element connection pin
12 VSS GND
13 XIN I Crystal oscillating element connection pin
14 VDD VDD
15
nmi
I NMI input
16 NC Not used
17–20
kd1-4
I Key data 1-4
21–26
ks1-6
I/O Key strobe input/output 1-6
27–31 NC Not used
32 ILMD O C Dual illumination
33 KYDT O C Key data output
34 DPDT I Display data input
35 NC Not used
36 OEL O C OEL controller ON
37
rdy
I OEL controller ready input
38 NC Not used
39
hold
I Hold input
40,41 NC Not used
42
rd
O C Read strobe
43
bhe
O C Write High byte enable
44
wr
O C Write strobe
45 NC Not used
46
cs2
O C Bank address (High)
47
cs1
O C Bank address (Low)
48
cs0
O C External ROM chip select
49–59 A19-9 O C Address bus Output 19bit-9bit
60 VDD VDD
61 A8 O C Address bus Output 8bit
62 VSS GND
63–70 A7-0 O C Address bus Output 7bit-0bit
71–86 D15-0 I/O Data bus 15bit-0bit
87–100 NC Not used
Format Meaning
C C MOS
*PD5471A
25
26
50
51
75
76
100
1