參數(shù)資料
型號: ST16C452PS
廠商: Exar Corporation
英文描述: Dual UART with Parallel Printer Port(雙通用異步接收器/發(fā)送器(帶并行打印機端口))
中文描述: 雙UART與并行打印機端口(雙通用異步接收器/發(fā)送器(帶并行打印機端口))
文件頁數(shù): 21/30頁
文件大小: 389K
代理商: ST16C452PS
21
ST16C452/452PS
Rev. 3.10
CON BIT-5:
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
REGISTERS
(UART)
RESET STATE
IER
ISR
LCR
MCR
LSR
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
MSR
REGISTERS
Printer Port
RESET STATE
IOSEL
SR
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
COM
CON
SIGNALS
RESET STATE
TX A/B
-RTS A/B
-DTR A/B
INT A/B, P
PD0-PD7
-STROBE
-AutoFDXT
INIT
-SLCTIN
High
High
High
Three state mode
Low, output mode
High, output mode
High, output mode
Low, output mode
High, output mode
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