Panasonic JS-170FR Series, Service Manual

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2.1.5.1 IT8673F Pin Assignment
Pin No. Signal name IN/OUT Functions
5 DENSEL# OUT (*) FDD packing density select signal. High
•
500K/1Mbps ,Low
•
250K/300Kbps
6 MTR0# OUT(*) Motor enable signal to the FDD Drive 0. Active : Low
7 DRV1# OUT(*) Select signal to the FDD Drive 1. Active : Low
8 DRV0# OUT(*) Select signal to the FDD Drive 0. Active : Low
9 MTR1# OUT(*) Motor enable signal to the FDD Drive 1. Active : Low
11 FDDIR OUT(*) The signal to specify the direction of the FDD head movement.
Low
→
Step in, High
→
Step out.
12 STEP# OUT(*) The signal to move the head during FDD seek. Active : Low
13 WDATA# OUT(*) FDD write data signal. Active : Low
14 WGATE# OUT(*) Write circuit enable signal for the drive that has seized the FDD. Active : Low
15 HDSEL OUT(*) FDD head select signal. Low
→
Head 1, High
→
Head 0.
16 INDEX# IN The signal to indicate the first FDD track. Active : Low
17 TRK0# IN Position signal for FDD Track 0. Active : Low
18 WPRT# IN FDD write protect (write disable) signal. Active : Low
19 RDATA# IN FDD read signal.
20 DSKCHG IN The signal used to indicate that the FDD drive door is open. Active : High
21
|
32
91
92
A0
|
A11
A12
A13
IN
System address bus.
Address-latched signal.
33 IOCHRDY OUT(*) The signal that turns low when I/O address 210H is accessed.
34 SIRQ IN/OUT Serial interrupt signal.
36 PCICLK IN PCI clock for SIRQ sync.
37 IOR# IN Read signal to the I/O device. Active : Low
38 IOW# IN Write signal to the I/O device. Active : Low
39
|
42
44
|
47
D0
|
D3
D4
|
D7
IN/OUT
System data bus.
48 RXD1 IN COM1 serial input data.
49 TXD1 OUT COM1 serial output data.
50 DSR1# IN COM1 data set ready signal. Active : Low
51 RTS1#/PIN95SEL IN/OUT COM1 send request signal. Active : Low
Used at the high level with pin 95 for SA14 when the power supply is ON.
52 CTS1# IN COM1 send enable signal. Active : Low
53 DTR1#/PIN96SEL OUT COM1 data terminal ready signal. Active : Low
Used at the high level with pin 96 for SA15 when the power supply is ON.
54 RI1# IN COM1 ring indicator signal. Active : Low
55 DCD1# IN COM1 data carrier detect signal. Active : Low
56 RI2# IN COM2 ring indicator signal. Active : Low
57 DCD2# IN COM2 data carrier detect signal. Active : Low
58 RXD2 IN COM2 serial input data.
59 TXD2 OUT COM2 serial output data.
60 DSR2# IN COM2 data set ready signal. Active : Low
61 RTS2#/KBC_IROM OUT COM2 send request signal. Active : Low
Used at the high level with the KB controller’s built-in ROM when the power
supply is ON.
62 CTS2# IN COM2 send enable signal. Active : Low
Used to enable the KB controller at the high level when the power supply is ON.
63 DTR2#/KBCEN OUT COM2 data terminal ready signal. Active : Low