參數(shù)資料
型號(hào): ST68C454CJ68
廠商: EXAR CORP
元件分類: 微控制器/微處理器
英文描述: 4 CHANNEL(S), 1.5M bps, SERIAL COMM CONTROLLER, PQCC68
封裝: PLASTIC, LCC-68
文件頁(yè)數(shù): 6/29頁(yè)
文件大?。?/td> 184K
代理商: ST68C454CJ68
ST16C454
14
Rev. 3.30
REGISTER FUNCTIONAL DESCRIPTIONS
The following table delineates the assigned bit functions for the fifteen 454 internal registers. The assigned bit
functions are more fully defined in the following paragraphs.
Table 6, ST16C454 INTERNAL REGISTERS
A2 A1 A0
Register
BIT-7
BIT-6
BIT-5
BIT-4
BIT-3
BIT-2
BIT-1
BIT-0
[Default]
Note *5
General Register Set
0
RHR[XX]
bit-7
bit-6
bit-5
bit-4
bit-3
bit-2
bit-1
bit-0
0
THR[XX]
bit-7
bit-6
bit-5
bit-4
bit-3
bit-2
bit-1
bit-0
0
1
IER[00]
0000
modem
receive
transmit
receive
status
line
holding
interrupt
status
register
interrupt
0
1
0
ISR[01]
0000
INT
priority
status
bit-2
bit-1
bit-0
0
1
LCR[00]
divisor
set
even
parity
stop
word
latch
break
parity
enable
bits
length
enable
bit-1
bit-0
1
0
MCR[00]
0
loop
-OP2/
-OP1
-RTS
-DTR
back
INTx
enable
1
0
1
LSR[60]
0
trans.
break
framing
parity
overrun
receive
empty
holding
interrupt
error
data
empty
ready
1
0
MSR[X0]
CD
RI
DSR
CTS
delta
-CD
-RI
-DSR
-CTS
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
DLL[XX]
bit-7
bit-6
bit-5
bit-4
bit-3
bit-2
bit-1
bit-0
0
1
DLM[XX]
bit-15
bit-14
bit-13
bit-12
bit-11
bit-10
bit-9
bit-8
Note *2: The Special register set is accessible only when LCR bit-7 is set to “1”.
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