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(jī)端口))
中文描述: 雙UART與并行打印機(jī)端口(雙通用異步接收器/發(fā)送器(帶并行打印機(jī)端口))
文件頁數(shù): 13/30頁
文件大?。?/td> 389K
代理商: ST16C452PS
13
ST16C452/452PS
Rev. 3.10
REGISTER FUNCTIONAL DESCRIPTIONS
The following table delineates the assigned bit functions for the eighteen 452/452PS internal registers. The
assigned bit functions are more fully defined in the following paragraphs.
Table 7, ST16C452/452PS INTERNAL REGISTERS
A2 A1 A0
Register
[Default]
Note 5*
BIT-7
BIT-6
BIT-5
BIT-4
BIT-3
BIT-2
BIT-1
BIT-0
General Register Set: Note 1*
0
0
0
RHR [XX]
bit-7
bit-6
bit-5
bit-4
bit-3
bit-2
bit-1
bit-0
0
0
0
THR [XX]
bit-7
bit-6
bit-5
bit-4
bit-3
bit-2
bit-1
bit-0
0
0
1
IER [00]
0
0
0
0
Modem
Status
Interrupt
Receive
Line
Status
interrupt
Transmit
Holding
Register
interrupt
Receive
Holding
Register
0
1
0
ISR [01]
0
0
0
0
INT
priority
bit-2
INT
priority
bit-1
INT
priority
bit-0
INT
status
0
1
1
LCR [00]
divisor
latch
enable
set
break
set
parity
even
parity
parity
enable
stop
bits
word
length
bit-1
word
length
bit-0
1
0
0
MCR [00]
0
0
0
loop
back
INT A/B
enable
[X]
-RTS
-DTR
1
0
1
LSR [60]
0
THR &
TSR
empty
THR.
empty
break
interrupt
framing
error
parity
error
overrun
error
receive
data
ready
1
1
0
MSR [X0]
CD
RI
DSR
CTS
delta
-CD
delta
-RI
delta
-DSR
delta
-CTS
1
1
1
SPR [FF]
bit-7
bit-6
bit-5
bit-4
bit-3
bit-2
bit-1
bit-0
Special Register Set: Note *2
0
0
0
DLL [XX]
bit-7
bit-6
bit-5
bit-4
bit-3
bit-2
bit-1
bit-0
0
0
1
DLM [XX]
bit-15
bit-14
bit-13
bit-12
bit-11
bit-10
bit-9
bit-8
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