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