It8673F Circuit - Panasonic JS-170FR Series Service Manual

2.1.5

IT8673F circuit

The IT8673F is used as an LSI for the control of peripheral I/O circuits, keyboard, and mouse.
The IT8673F functions as the two UART units (equivalent to 16C550), the parallel port with the FDC (equivalent to DP8473)
incorporating the analog data separator, and the #8042 compatible keyboard controller having the mouse control function
conforming to the PS/2 Specification.
An I/O address decoder circuit conforming to the Plug & Play Specification V1.0a is incorporated to realize AT compatible
functions.
The respective functions are set up with the software.
S D { 0 : 7 }
S A { 0 : 1 5 }
RESE T DRV
AEN
IO R #
IOW #
I O CHRDY
DRQ1
DRQ2
DRQ3
* DA CK1
* DA CK2
* DA CK3
T C
SER I RQ
PC I - CL K
RC IN #
A2 0 GAT E
S A1 5
9 6
A1 5
S A1 4
9 5
A1 4
S A1 3
9 2
A1 3
S A1 2
9 1
A1 2
S A1 1 3 2
A1 1
S A1 0 3 1
A1 0
S A9 3 0
A9
S A8
2 9
A8
S A7 2 8
A7
S A
2 7
A6
S A5
2 6
A5
S A4 2 5
A4
S A3 2 4
A3
S A2 2 3
A2
S A1
2 2
A1
S A0
2 1
A0
1 1 9
RESET
1 1 8
AEN
3 7
IO R #
3 8
IO W #
3 3
IO CHRDY
7 4
DRQ1
7 5
DRQ2
7 6
DRQ3
8 7
DACK1 #
8 8
DACK2 #
8 9
DACK3 #
1 2 0
T C
3 4
S I RQ
3 6
PC I C L K
8 3
KRST #
8 6
G A2 0
2-15
47 SD7
DB7
46 SD6
I T 8 7 6 3 F
DB6
45 SD5
DB5
44 SD4
DB4
SD3
42
DB3
SD2
41
DB2
SD1
40
DB1
39
S D0
DB0
7 8
C LK I N
24MHz