w83977tf Winbond Electronics Corp America, w83977tf Datasheet - Page 4

• Manufacturer Part Number: w83977tf
• Description: Winbond I/o
• Manufacturer: Winbond Electronics Corp America

3. UART PORT............................................................................................................................ 40
4. INFRARED (IR) PORT ......................................................................................................... 49
5. PARALLEL PORT ............................................................................................................... 49
3.1
3.2
5.1
5.2
5.3
2.2.6 DATA RATE REGISTER (DR REGISTER) (WRITE BASE ADDRESS + 4) .......................34
2.2.7 FIFO REGISTER (R/W BASE ADDRESS + 5) ..........................................................................36
2.2.8 DIGITAL INPUT REGISTER (DI REGISTER) (READ BASE ADDRESS + 7)....................38
2.2.9 CONFIGURATION CONTROL REGISTER (CC REGISTER)
UNIVERSAL ASYNCHRONOUS RECEIVER/TRANSMITTER (UART A, UART B)..................40
REGISTER ADDRESS..............................................................................................................................40
3.2.1 UART CONTROL REGISTER (UCR) (READ/WRITE)...........................................................40
3.2.2 UART STATUS REGISTER (USR) (READ/WRITE) ...............................................................42
3.2.3 HANDSHAKE CONTROL REGISTER (HCR) (READ/WRITE) ............................................43
3.2.4 HANDSHAKE STATUS REGISTER (HSR) (READ/WRITE).................................................44
3.2.5 UART FIFO CONTROL REGISTER (UFR) (WRITE ONLY) .................................................45
3.2.6 INTERRUPT STATUS REGISTER (ISR) (READ ONLY).......................................................46
3.2.7 INTERRUPT CONTROL REGISTER (ICR) (READ/WRITE).................................................47
3.2.8 PROGRAMMABLE BAUD GENERATOR (BLL/BHL) (READ/WRITE) .............................47
3.2.9 USER-DEFINED REGISTER (UDR) (READ/WRITE).............................................................48
PRINTER INTERFACE LOGIC ...............................................................................................................49
ENHANCED PARALLEL PORT (EPP)..................................................................................................50
5.2.1 DATA SWAPPER ..........................................................................................................................51
5.2.2 PRINTER STATUS BUFFER.......................................................................................................51
5.2.3 PRINTER CONTROL LATCH AND PRINTER CONTROL SWAPPER...............................52
5.2.4 EPP ADDRESS PORT...................................................................................................................52
5.2.5 EPP DATA PORT 0-3....................................................................................................................53
5.2.6 BIT MAP OF PARALLEL PORT AND EPP REGISTERS .......................................................53
5.2.7 EPP PIN DESCRIPTIONS ............................................................................................................54
5.2.8 EPP OPERATION ..........................................................................................................................54
EXTENDED CAPABILITIES PARALLEL (ECP) PORT .....................................................................55
5.3.1 ECP REGISTER AND MODE DEFINITIONS...........................................................................55
5.3.2 DATA AND ECPAFIFO PORT....................................................................................................56
5.3.3 DEVICE STATUS REGISTER (DSR).........................................................................................56
5.3.4 DEVICE CONTROL REGISTER (DCR) ....................................................................................57
(WRITE BASE ADDRESS + 7)...................................................................................................39
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Publication Release Date: March 1998
W83977TF
Revision 0.62