Aiwa XR-MP50 Service Manual page 41

Pin No. Pin Name
43 FINR
44 VREF
IC, LC89513K
Pin No. Pin Name
1 VSS
2 ~ 8 RA0 ~ RA6
9 VSS
10 ~ 16 RA7 ~ RA13
17 VSS
18 RA13B
19 RCS
20 RWE
21 ROE
22 RESET
23 XTALCK
24 VDD
25 C2PO
26 BCK
27 SDATA
28 LRCK
29 RS
30 RD
31 WR
32 CS
33 VSS
34 ~ 41 D0 ~ D7
42 PSRAM
43 INT
44 DRQ
45 ~ 48 HD0 ~ HD3
49 VSS
50 ~ 53 HD4 ~ HD7
54 HRD
55 DTEN
56 VDD
57 ~ 64 IO0 ~ IO7
I/O
I/O Input for FOUTR or filter OP-AMP output (line out).
I Analog reference ground.
I/O
– Ground.
O Address signal output to data buffer RAM pin.
– Ground.
O Address signal outut to data buffer RAM pin.
– Ground.
O Address signal output to data buffer RAM pin.
O Chip select to RAM pin.
O Data write signal to RAM pin.
O Data read signal from RAM pin.
I Reset pin reset at level low.
I Crystal oscillating circuit input pin.
– Power supply.
I C2 pointer input pin.
I Serial data input clock pin.
I Serial data input pin.
I 44.1kHz strobe signal input pin.
I Register select signal pin.
I CPU data read signal input pin.
I CPU data write signal input pin.
I Chip select signal input from CPU pin.
– Ground.
I/O CPU data signal pin with built in pull-up resistor.
I Pseudo-SRAM select pin.
O Interrupt request signal to CPU output pin.
O DRQ signal output pin.
O Data output to CPU pin.
– Ground.
O Data output to CPU pin.
I Data read signal input pin.
O Data enable signal output pin. (Not used)
– Power supply.
I/O Data buffer RAM data signal pin with built in pull-up resistor.
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Description
Description