W83977TF-A View Datasheet(PDF) - Winbond

Part Name

Description

Manufacturer

W83977TF-A

WINBOND I/O

Winbond 

W83977TF

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)

(WRITE BASE ADDRESS + 7)...................................................................................................39

3. UART PORT............................................................................................................................ 40

3.1 UNIVERSAL ASYNCHRONOUS RECEIVER/TRANSMITTER (UART A, UART B)..................40

3.2 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

4. INFRARED (IR) PORT ......................................................................................................... 49

5. PARALLEL PORT ............................................................................................................... 49

5.1 PRINTER INTERFACE LOGIC ...............................................................................................................49

5.2 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

5.3 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

Publication Release Date: March 1998

- II -

Revision 0.62

Share Link: