Aiwa XP-MP3 Service Manual page 28

IC DESCRIPTION - 4/6 (LC89513K) - 1/1
Pin No. Pin Name
1 VSS
2 ~ 8 RA0 ~ RA6
9 VSS
10 ~ 16 RA7 ~ RA13
17 VSS
__________
18 RA13
________
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
– Ground
O Address signal outputs to data buffer RAM
– Ground
O Address signal outputs to data buffer RAM
– Ground
O Address signal output to data buffer RAM
O Chip select output to RAM
O Data write signal to RAM
O Data read signal from RAM
I Reset input. "L": Reset
I Crystal oscillator circuit input
– Power supply
I C2 pointer input
I Clock for serial data input
I Serial data input
I 44.1kHz strobe signal input
I Register select signal
I CPU data read signal input
I CPU data write signal input
I Chip select signal input from CPU
– Gournd
I/O CPU data signal pins. Pull-up resistors are incorporated.
I Pseudo SRAM select pin
O Interrupt request signal output to CPU
O DRQ signal output
O Data output to CPU
– Ground
O Data output to CPU
I Data read signal input
O Data enable signal output
– Power supply
I/O Data buffer signal pins. Pull-up resistors are incorporated.
Description
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