參數(shù)資料
型號: XR19L202IL48-0B-EB
廠商: Exar Corporation
文件頁數(shù): 15/50頁
文件大?。?/td> 0K
描述: EVAL BOARD FOR XR19L202 48QFN
標(biāo)準(zhǔn)包裝: 1
系列: *
XR19L202
22
TWO CHANNEL INTEGRATED UART AND RS-232 TRANSCEIVER
REV. 1.0.1
4.0
INTERNAL REGISTER DESCRIPTIONS
4.1
Receive Holding Register (RHR) - Read- Only
4.2
Transmit Holding Register (THR) - Write-Only
4.3
Interrupt Enable Register (IER) - Read/Write
The Interrupt Enable Register (IER) masks the interrupts from receive data ready, transmit empty, line status
and modem status registers. These interrupts are reported in the Interrupt Status Register (ISR).
Baud Rate Generator Divisor
0 0 0
DLL
RD/WR
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
LCR[7]=1
LCR
≠ 0xBF
0 0 1
DLM
RD/WR
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
0 1 0
DLD
RD/WR
0
Bit-3
Bit-2
Bit-1
Bit-0
LCR[7]=1
LCR
≠ 0xBF
EFR[4] = 1
0 0 0
DREV
RD
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
LCR[7]=1
LCR
≠ 0xBF
DLL=0x00
DLM=0x00
0 0 1
DVID
RD
0
1
0
1
0
Enhanced Registers
0 0 0
TRG
WR
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
LCR=0XBF
0 0 0
FC
RD
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
0 0 1
FCTR
RD/WR
RX/TX
Mode
SCPAD
Swap
Trig
Table
Bit-1
Trig
Table
Bit-0
Rsrvd
RX IR
Input
Inv.
Rsrvd
0 1 0
EFR
RD/WR
Rsrvd
Special
Char
Select
Enable
IER [7:4],
ISR [5:4],
FCR[5:4],
MCR[7:5],
DLD
Soft-
ware
Flow
Cntl
Bit-3
Soft-
ware
Flow
Cntl
Bit-2
Soft-
ware
Flow
Cntl
Bit-1
Soft-
ware
Flow
Cntl
Bit-0
1 0 0
XON1
RD/WR
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
1 0 1
XON2
RD/WR
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
1 1 0
XOFF1 RD/WR
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
1 1 1
XOFF2 RD/WR
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
TABLE 8: INTERNAL REGISTER DESCRIPTIONS. SHADED BITS ARE ENABLED WHEN EFR BIT-4=1
ADDRESS
A2-A0
REG
NAME
READ/
WRITE
BIT-7
BIT-6
BIT-5
BIT-4
BIT-3
BIT-2
BIT-1
BIT-0
COMMENT
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