GM82C803CN Datasheet, PDF (44/84 Pages) List of Unclassifed Manufacturers – 2.88 MB FDC/ Dual UARTs with FIFO/PIO(EPP/ ECP)/ IDE Interface/ S-IR/ PnP

GM82C803CN
PHASE R/W
COMMAND ^W
EXECUTION
RESULTS
R
R
R
R
R
R
R
R
R
D7
0
LOCK
D6 D5
0
0
SRT
0
D3
DUMPREG
D4
D3
0
1
PCN-Drive0
PCN-Drive1
PCN-Drive2
PCN-Drive3
HUT
SC / EOT
D2
D1
ST0
D2 D1 D0
R/W
1
1
0 * Note
Register placed in FIFO
HUT
D0 GAP WGATE
PERPENDICULAR MODE
PHASE R/W D7 D6 D5 D4
COMMAND ^W
0
0
0
0
W OW ^{0 D3 D2}
D3 D2 D1 D0
R/W
0
1
0 0 Command Codes
D1 D0 GAP ^WGATE
LOCK
PHASE R/W D7 D6
COMMAND ^{W LOCK 0}
RESULTS R
0
0
D5 D4
0
1
0 LOCK
D3 D2 D1 D0
R/W
0
1
0 0 Command Codes
0
0
00
INVALID
PHASE R/W D7 D6 D5 D4
D3 D2 D1 D0
R/W
COMMAND _W
Invalid Codes
Invalid Command
Codes(NoOp-82077AA
goes into Standby State)
RESULTS R
ST0
ST0 = 80H