Sony DPP-MS300 Marketing, Service Manual

Page: 60 / 88

5-63
Pin No. Pin Name I/O Description
52 3.3V/5V O 3.3V/5V selection signal output terminal “L”: 3.3V, “H”: 5V
53 J/U I Setting terminal for the destination Fixed at “L” in this set
54 CP O
Power on/off control signal output for the PC card and memory stick interface power supply
“H”: power on
55 VSS —
Ground terminal
56 CS O
Chip select signal output for the PC card interface
57 FLASH O
Chip select signal output to the ROM (IC506) “L” active
58 XACK O
Acknowledge signal output to the centronics parallel port
59 NC —
Not used (open)
60 STB I
Strobe signal input from the centronics parallel port
61 VSS —
Ground terminal
62 NC —
Not used (open)
63 VCC —
Power supply terminal (+5V)
64 NC —
Not used (open)
65 CD# I
Card in or not detection signal input from the PC card slot
66 CD I
Card in or not detection signal input from the PC card slot
67 VBLK I
V blanking signal input from the A/D, D/A converter (IC407) “L” active
68 XSTB I
Strobe signal input from the centronics parallel port
69 AT-FD I
AUTO FD input from the centronics parallel port
70 READY I
Interrupt request signal input from the PC card controller (IC1501)
71 VSS —
Ground terminal
72 SEL IN O
Select in input from the centronics parallel port
73 to 76 D15 to D12 I/O
Two-way data bus with the A/D, D/A converter (IC407), mechanism controller (IC505) and
D-RAM (IC509) (upper 8 bit)
77 VCC —
Power supply terminal (+5V)
78 D11 I/O
Two-way data bus with the A/D, D/A converter (IC407), mechanism controller (IC505) and
D-RAM (IC509) (upper 8 bit)
79 VSS —
Ground terminal
80 to 82 D10 to D8 I/O
Two-way data bus with the A/D, D/A converter (IC407), mechanism controller (IC505) and
D-RAM (IC509) (upper 8 bit)
83, 84 D7, D6 I/O
Two-way data bus with the A/D, D/A converter (IC407), mechanism controller (IC505), ROM
(IC506), D-RAM (IC509), PC card controller (IC1501) and PC card slot (lower 8 bit)
Data input from the centronics parallel port
85 VCC —
Power supply terminal (+5V)
86 D5 I/O
Two-way data bus with the A/D, D/A converter (IC407), mechanism controller (IC505), ROM
(IC506), D-RAM (IC509), PC card controller (IC1501) and PC card slot (lower 8 bit)
Data input from the centronics parallel port
87 VSS —
Ground terminal
88 to 92 D4 to D0 I/O
Two-way data bus with the A/D, D/A converter (IC407), mechanism controller (IC505), ROM
(IC506), D-RAM (IC509), PC card controller (IC1501) and PC card slot (lower 8 bit)
Data input from the centronics parallel port
93 VSS — Ground terminal
94 XTL I System clock input terminal (14.31818 MHz)
95 MD3 I Setting terminal for the CPU operational mode (fixed at “H” in this set)
96 EXTL O System clock output terminal (14.31818 MHz)
97 MD2 I Setting terminal for the CPU operational mode (fixed at “L” in this set)
98 XINIT I Interrupt request signal input from the centronics parallel port
99 VCC/FWP O Communication bus control signal output to the external port (normally: pull up)
100 RESET O Reset signal output to the PC card controller (IC1501) and PC card slot
101 XWAIT I Wait control input from the PC card controller (IC1501) “L” active