Sony SCD-1/777ES Service Manual page 44

Pin No. Pin Name
45 A8
46 A9
47 A10
48 A11
49 A12
50 A13
51 A14
52 A15
53 A16
54 A17
55 A18
56 A19
57 VSS
58 WAIT
59 EEP SIO
60 EEP SCL
61 CLK
62 STBY
63 RES
64 NMI
65 VSS
66 EXTAL
67 XTAL
68 VCC
69 AS
70 RD
71 HWR
72 LWR
73 MD0
74 MD1
75 MD2
76 AVCC
77 VREF
78 AN0
79 BUSY2
80 ADS RDY
81 IFBSY
82 PLIN
83 AK0
84 AK1
85 AK2
86 AVSS
44
I/O
O
O
O
O
O
Address signal output to the flash memory (IC716) and S-RAM (IC717, 718)
O
O
O
O
O
O
Address signal output to the flash memory (IC716)
O Address signal output terminal
—
Ground terminal
I
Wait signal input from the ARP (IC702)
I/O
Two-way data bus with the EEPROM (IC735)
O clock signal output to the EEPROM (IC735)
O
System clock output terminal Not used (open)
I
Hardware standby signal input terminal (fixed at "H")
System reset signal input from the ARP (IC702) and reset signal generator (IC734) "L": reset
I
For several hundreds msec. after the power supply rises, "L" is input, then it changes to "H"
I
NMI signal input terminal Not used (pull up)
— Ground terminal
I
System clock input terminal (16 MHz)
I
System clock input terminal (16 MHz)
—
Power supply terminal (+5V)
O
Address strobe signal output terminal Not used (open)
Strobe signal output for data reading to the servo digital signal processor (IC512), ARP (IC702),
O
expander (IC711, 712), flash memory (IC716) and S-RAM (IC717, 718)
Strobe signal output for data writing to the servo digital signal processor (IC512), ARP (IC702),
O expander (IC712), flash memory (IC716) and upper byte data writing strobe signal output to the
S-RAM (IC717)
Strobe signal output for data writing to the expander (IC711) and lower byte data writing strobe
O
signal output to the S-RAM (IC716)
I
Input terminal for setting microcomputer operation mode (fixed at "L")
I Input terminal for setting microcomputer operation mode (fixed at "L")
I
Input terminal for setting microcomputer operation mode (fixed at "H")
—
Power supply terminal (+5V)
I
Reference voltage input terminal (+5V)
I
Serial data input from the RS-232C (for check)
I
BUSY signal input from the servo digital signal processor (IC512)
I
Ready signal input terminal (fixed at "H")
I BUSY signal input from the FL controller (IC1001)
I
PL signal input from the servo digital signal processor (IC512)
I
Monitor signal input from the expander (IC711)
O
Monitor signal output terminal (fixed at "L") Two-way data bus with the expander (IC712) , flash memory (IC716) and S-RAM (IC718)
Two-way data bus with the expander (IC712) , flash memory (IC716) and S-RAM (IC718) Two-way data bus with the expander (IC712) , flash memory (IC716) and S-RAM (IC718)
O
—
Ground terminal
Description
Not used (open)