XR16C872 Datasheet, PDF (40/60 Pages) Exar Corporation – DUAL UART WITH 1284 PARALLEL PORT AND PLUG-AND-PLAY CONTROLLER

XR16C872
DISCONTINUED
1284 CONTROLLER REGISTERS DESCRIPTION
A10 A2 A1 A0 REGISTER D7
D6
D5
D4
D3
D2
D1
D0
0 000
Data
PD7
PD6
PD5
PD4
PD3
PD2
PD1
PD0
ECP-AFIFO
0 001
DSR
BUSY ACKE
PE SELECT ERR#
1
1
1
0 010
DCR
0
0
DIR
INT SELCTIN# INIT# AUTOFD# STROBE#
enable
0 0 1 1 EPP-APort AP-7
AP-6
AP-5
AP-4
AP-3
AP-2
AP-1
AP-0
0 1 0 0 EPP-DPort PDA-7 PDA-6 PDA-5 PDA-4 PDA-3 PDA-2 PDA-1 PDA-0
0 1 0 1 EPP-DPort PDB-7 PDB-6 PDB-5 PDB-4 PDB-3 PDB-2 PDB-1 PDB-0
0 1 1 0 EPP-DPort PDC-7 PDC-6 PDC-5 PDC-4 PDC-3 PDC-2 PDC-1 PDC-0
0 1 1 1 EPP-DPort PDD-7 PDD-6 PDD-5 PDD-4 PDD-3 PDD-2 PDD-1 PDD-0
1 X 0 0 CONF-A
ECP
0
0
1
0
FIFO-F
0
0
INT type
1 X 0 1 CONF-B
RLE
IRQ
input
IRQ
Sel-2
IRQ
Sel-1
IRQ
Sel-0
DMA
Sel-2
DMA
Sel-1
DMA
Sel-0
1 X10
ECR
MODE MODE MODE FAULT DMA Service
Sel-2
Sel-1
Sel-0 enable En/Dis
INT
FIFO
full
FIFO
empty
Rev. 1.00
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