參數(shù)資料
型號(hào): XR16C872
廠商: Exar Corporation
英文描述: Dual UART with 1284 Parallel Port and Plug-and-Play(PnP) Controller(雙通用異步接收器/發(fā)送器(帶1284雙向并行端口和即插即用控制器))
中文描述: 雙UART)與1284并行端口,插頭插即用(PnP)功能控制器(雙通用異步接收器/發(fā)送器(帶1284雙向并行端口和即插即用控制器)
文件頁(yè)數(shù): 26/60頁(yè)
文件大小: 314K
代理商: XR16C872
XR16C872
26
Rev. P1.00
Preliminary
UART INTERNAL REGISTERS (CONT'D)
A2 A1 A0
Register
[Default]
Note
*3
BIT-7
BIT-6
BIT-5
BIT-4
BIT-3
BIT-2
BIT-1
BIT-0
Enhanced Registers are accessible only when LCR is set to 0xBF.
0
0
0
TRG [00]
Trig/
FC
Trig/
FC
Trig/
FC
Trig/
FC
Trig
FC
Trig/
FC
Trig/
FC
Trig/
FC
0
0
1
FCTR [00]
Rx/Tx
Mode
SPR/EMSR
Select
Trig
bit-1
Trig
bit-0
RS485
Auto
control
IrRx
Inv.
RTS
RTS
Hysteresis Hysteresis
bit-1
bit-0
0
1
0
EFR [00]
Auto
CTS
Auto
RTS
Special
Char.
select
1234567890123
Cont-3
Tx,Rx
Control
Cont-2
Tx,Rx
Control
Cont-1
Tx,Rx
Control
Cont-0
Tx,Rx
Control
1
0
0
Xon-1[00]
bit-7
bit-6
bit-5
bit-4
bit-3
bit-2
bit-1
bit-0
1
0
1
Xon-2[00]
bit-15
bit-14
bit-13
bit-12
bit-11
bit-10
bit-9
bit-8
1
1
0
Xoff-1[00]
bit-7
bit-6
bit-5
bit-4
bit-3
bit-2
bit-1
bit-0
1
1
1
Xoff-2[00]
bit-15
bit-14
bit-13
bit-12
bit-11
bit-10
bit-9
bit-8
EMSR Register is accessible only when FCTR bit 6 is set to logic 1.
1
1
1
EMSR [00]
Not
Used
Not
Used
RTS
RTS
Reserved Reserved
ALT.
Rx/Tx
FIFO
Count
Rx/Tx
FIFO
Count
Hysteresis Hysteresis
bit-3
bit-2
1234567890123
1234567890123
1234567890123
1234567890123
1234567890123
1234567890123
1234567890123
1234567890123
1234567890123
1234567890123
1234567890123
1234567890123
1234567890123
1234567890123
1234567890123
1234567890123
1234567890123
1234567890123
1234567890123
1234567890123
1234567890123
Note:
*3
- The value represents the register’s initialized HEX value. An “X” signifies a 4-bit un-initialized nibble.
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