Epak General Purpose Input; Serial Eeprom Data In; Parallel Output Port; Request-To-Send - Performance Computer PT-VME161 User Manual

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Section FUNCTIONAL DESCRIPTION

EPAK General Purpose Input

Serial EEPROM Data In

Parallel Output Port

Request-to-Send

Data-Set-Ready

EPAK General Purpose Output

Serial EEPROM Select

Serial EEPROM Control

52 Extensible Single Board Computer/Controller User's Manual
Parallel Input 3 of the DUART is attached to the EPAK +EPKIO signal. The state of this control
signal can be read from the IP3 bit (3) of the DUART Input Port Register. The function of this
pin is determined by the attached EPAK Expansion Module.
The DUART is capable of generating an interrupt to the 68060 if a change of state occurs on
this signal. To accomplish this, the Delta IP3 IRQ bit (3) of the DUART Auxiliary Control
Register must be set, and the SCV64 registers associated with the DUART Interrupt Request
must be setup.
Parallel Input 5 of the DUART is attached to the Data Out (DO) pin of the 93C46 Serial
EEPROM. The state of this control signal can be read from the IP5 bit (5) of the DUART Input
Port Register.
Parallel Output 0 of the DUART is attached to the RS-232 Request-to-Send (RTS) transmitter
for Serial Port "A". To allow RTS to act as a hardware indicator that the channel A transmit
FIFO has data ready to send, Tx RTS Control bit (5) in DUART Channel A Mode Register must
be set to 1. Programmed I/O can control the state of this signal with the OPR0 bit (0) of the
DUART Output Port Register.
Parallel Output 1 of the DUART is attached to the RS-232 Data- Set-Ready (DSR) transmitter
for Serial Port "A". Programmed I/O can control the state of this signal with OPR1 bit (1) of the
DUART Output Port Register.
Parallel Output 3 of the DUART is attached to the EPAK +EPKIO signal. The state of this
control signal can be controlled by the OPR3 bit (3) of the DUART Output Port Register. The
function of this pin is determined by the attached EPAK Expansion Module.
Parallel Output 5 of the DUART is attached to the Chip Select (CS) pin of the 93C46 Serial
EEPROM. Programmed I/O can control the state of this signal with the OPR5 bit (5) of the
DUART Output Port Register.
Parallel Output 6 of the DUART is attached to the Control (SK) pin of the 93C46 Serial
EEPROM. Programmed I/O can control the state of this signal with the OPR6 bit (6) of the
DUART Output Port Register.