PIN
No./QFP
NAME
TOTAL
SYMBOL
VSS
BUFFER TYPE
7, 48,
74, 104
67
Digital Ground
Analog Ground
4
1
1
1
AVSS
VTR
69
Trickle Supply Voltage
Battery Voltage
65
VBAT
POWER MANAGEMENT (3)
19
20
21
Power On
1
1
1
nPOWERON
BUTTON_IN
nPME
OD24
I
Button In
Power Management Event/SCI/IRQ9
O12
FDD INTERFACE (16)
16
11
10
12
8
Read Disk Data
Write Gate
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
nRDATA
nWGATE
nWDATA
nHDSEL
nDIR
IS
O24
O24
O24
O24
O24
IS
Write Disk Data
Head Select
Step Direction
9
Step Pulse
nSTEP
17
5
Disk Change
nDSKCHG
nDS0
Drive Select 0
O24
IO24
O24
IO24
IS
6
Drive Select 1/GP17
Motor On 0
nDS1
3
nMTR0
4
Motor On 1/GP16
Write Protected
Track 0
nMTR1
15
14
13
1
nWRTPRT
nTRKO
IS
Index Pulse Input
Drive Density Select 0
Drive Density Select 1/GP52/IRQ8/nSMI
nINDEX
DRVDEN0
DRVDEN1
IS
O24
IO24
2
GENERAL PURPOSE I/O (6)
77
78
General Purpose 10/nSMI
General Purpose 11/nRING/EETI
1
GP10
GP11
IO12
IO4
1
8
SMSC [ SMSC CORPORATION ]
