FDC37N958FR Datasheet, PDF (201/316 Pages) List of Unclassifed Manufacturers – Notebook I/O Controller with Enhanced Keyboard and System Control

PARALLEL PORT CONTROL REGISTER
Host
N/A
8051
0x7F3B
Power
VCC2
Default
0x00
D7
D6
D5
D4
D3
D2
D1
D0
8051 R/W R/W R/W R/W R/W R/W
R/W
R/W
R/W
System
N/A N/A N/A N/A
N/A
N/A
N/A
N/A
R/W
Bit Def
0
0
PCD
0 SLCTIN nINIT AUTOFD STROBE
If 8051 access to the parallel port pins is
enabled. The value of STROBE, AUTOFD and
SLCTIN are inverted and output onto the parallel
port control pins. The value of nINIT is output
onto the parallel port control pins. If PCD
(Parallel Control Direction) = 0, the data bus is
output. If PCD = 1 the parallel port data bus is
floating to allow read data in.
PARALLEL PORT DATA REGISTER
Host
N/A
8051
0x7F3C
Power
VCC2
Default
0x00
D7
D6
D5
D4
D3
D2
D1
D0
8051 R/W R/W R/W R/W R/W R/W R/W R/W R/W
System R/W N/A N/A N/A N/A N/A N/A N/A N/A
Bit Def
PD7 PD6 PD5 PD4 PD3 PD2 PD1 PD0
If 8051 access to the parallel port pins is
enabled; When read, this register reads the logic
levels on the parallel port pins.
SMSC DS – FDC37N958FR
Page 195
Rev. 09/01/99