ST16C452CJ68PS-F View Datasheet(PDF) - Exar Corporation
Part Name
Description
MFG CO.
'ST16C452CJ68PS-F' PDF : 30 Pages View PDF
ST16C452/452PS
CON BIT-5: [452PS only]
This bit is used in conjunction with the state of BIDEN
to set the direction (input/output) of the PD7-PD0 data
bus.
Logic 0 + BIDEN 1 = PD7-PD0 are set for output mode
(normal default condition)
Logic 1 + BIDEN 1 = PD7-PD0 are set for input mode
CON BIT 6-7:
Not Used - initialized to a logic 1.
ST16C452/452PS EXTERNAL RESET CONDI-
TION
SIGNALS
TX A/B
-RTS A/B
-DTR A/B
INT A/B, P
PD0-PD7
-STROBE
-AutoFDXT
INIT
-SLCTIN
RESET STATE
High
High
High
Three state mode
Low, output mode
High, output mode
High, output mode
Low, output mode
High, output mode
REGISTERS
(UART)
RESET STATE
IER
ISR
LCR
MCR
LSR
MSR
BITS 0-7=0
ISR BIT-0=1, ISR BITS 1-7=0
LCR BITS 0-7=0
MCR BITS 0-7=0
LSR BITS 0-4=0,
LSR BITS 5-6=1 LSR, BIT 7=0
MSR BITS 0-3=0,
MSR BITS 4-7=input signals
REGISTERS
Printer Port
RESET STATE
IOSEL
SR
COM
CON
IOSEL BITS-0-7=0
SR BITS 0-1=1, BITS 2-7=input
signals
COM BITS 0-4=0, BITS 5-7=1
CON BITS 0-5=0, BITS 6-7=1
Rev. 3.20
21
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