PC87570 Datasheet, PDF (24/168 Pages) National Semiconductor (TI) – PC87570 Keyboard and Power Management Controller

Signal/Pin Connection and Description
Signal
Pin Number
160-pin
176-pin
Buffer Type
Input
Output
Function
KBSIN7-0
27-34
29-36 CMOSS-PU -
Internal Keyboard Input scan lines
KBSOUT15-0 35-50
37-42, -
47-56
OD
Internal Keyboard Output scan lines
PA6-0
121, 120,
9, 8,
149, 148,
143,
135, 130,
11, 10,
163, 162,
157
TTL-PU
CM-PU
Port A, bits 0 through 6
PB7-0
72-65
78-71 TTL-PU
CM-PU
Port B, bits 0 through 7
PC2-0
57-55
63-61 TTL-PU
CMHD1-PU Port C, bits 0 through 2 high drive output buffers
PC7-3
64-62, 59, 58 70-68, 65, 64 TTL-PU
CM-PU
Port C, bits 3 through 7
PD7-0
84, 83, 80-75 94, 93, 86-81 TTL
-
Port D, bits 0 through 7, input port only
PE1,0
122, 10
136, 12 TTL-PU
CM-PU
Port E, bits 0 through 1
PF7-0
138-131
152-145 TTL
CM
Port F, bits 0 through 7
PFAIL
73
79
CMOSS
-
Power Fail. Non-maskable interrupt input
detected
PFS
91
101
-
CM
Pipe Flow Status signal
PG4-0
103, 96, 113, 106, TTL
CM
97, 119, 107, 129,
100
110
Port G, bits 0 through 4
PH5-0
89-94
99-104 TTL
CM
Port H, bits 0 through 5
PLI
90
100
-
CM
Pipe Long Instruction signal
PSCLK1¹
52
58
TTL-PU
CMHD1-PU^{1 PS/2 Channel 1 Clock signal}
PSCLK2¹
54
60
TTL-PU
CMHD1-PU^{1 PS/2 Channel 2 Clock signal}
PSCLK3¹
64
70
TTL-PU
CMHD1-PU^{1 PS/2 Channel 3 Clock signal}
PSDAT1¹
51
57
TTL-PU
CMHD1-PU^{1 PS/2 Channel 1 Data signal}
PSDAT2¹
53
59
TTL-PU
CMHD1-PU^{1 PS/2 Channel 2 Data signal}
PSDAT3¹
63
69
TTL-PU
CMHD1-PU^{1 PS/2 Channel 2 Data signal}
RD
101
111
-
CMHD
Read control signal. May be used as Output
Enable.
RING
65
71
CMOSS
-
Advanced Power Control Ring detect and wake-
up input
SCL
66
72
CMOSS-PU OD-PU
ACCESS.bus Serial Clock signal
SDA
67
73
CMOSS-PU OD-PU
ACCESS.bus Serial Data signal
SEL0
95
105
-
CM
Zone Select 0. Chip-select signal for the Exter-
nal Memory.
SEL1
96
106
-
CM
Zone Select 1. Used to select the off-chip Base
Memory.
SELIO
100
110
-
CM
I/O Expansion chip-select signal
SHBM
122
136
STRAP
-
Shared host BIOS Memory. Enable when 0
SWIN
72
78
STRAP
-
On switch to the MIWU and ICU
TA
68
74
TTL
CM
Timer pin A
www.national.com
24