User Guide

Chapter 4 System Disassembly
340S2 36
Rev : B
74LVC373 (U14)
Super I/O Controller (PC87393) IR
(HRM230S)
U14
74LVC373
D0
3
D1
4
D2
7
D3
8
D4
13
D5
14
D6
17
D7
18
OC
1
G
11
Q0
2
Q1
5
Q2
6
Q3
9
Q4
12
Q5
15
Q6
16
Q7
19
GND
10
VCC
20
U11
LAD0
15
LAD1
16
LAD2
17
LAD3
18
LCLK
8
LRESET#
9
12
VDD
14
VDD
39
VDD
63
VDD
88
PD0/INDEX#
52
PD1/TRK0#
50
PD2/WP#
48
PD3/RDATA#
46
PD4/DSKCHG#
45
PD5/MSEN0
44
PD6/DRATE0
43
42
IR1
VCC
1
RXGND
2
PSD
3
RXVCC
4
TXVCC
5
RXD_B
6
GND
12