REV. 1.0.3 4.0 INTERNAL REGISTERS DESCRIPTION 4.1 Receive Holding Regi" />
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參數(shù)資料
型號(hào): |
XR19L402IL48-F |
廠商: |
Exar Corporation |
文件頁(yè)數(shù): |
17/49頁(yè) |
文件大小: |
0K |
描述: |
IC UART/TXRX RS485 48QFN |
標(biāo)準(zhǔn)包裝: |
260 |
特點(diǎn): |
*
|
通道數(shù): |
2,DUART
|
FIFO's: |
64 字節(jié)
|
規(guī)程: |
RS485
|
電源電壓: |
3.3V,5V
|
帶自動(dòng)流量控制功能: |
是
|
帶IrDA 編碼器/解碼器: |
是
|
帶故障啟動(dòng)位檢測(cè)功能: |
是
|
帶調(diào)制解調(diào)器控制功能: |
是
|
帶CMOS: |
是
|
安裝類(lèi)型: |
表面貼裝
|
封裝/外殼: |
48-VFQFN 裸露焊盤(pán)
|
供應(yīng)商設(shè)備封裝: |
48-QFN-EP(7x7)
|
包裝: |
托盤(pán)
|
XR19L402
24
TWO CHANNEL INTEGRATED UART AND RS-485 TRANSCEIVER
REV. 1.0.3
4.0 INTERNAL REGISTERS DESCRIPTION
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
Auto Half-
Duplex
Direction
Control
RX IR
Input
Inv.
(Ch B
Only)
Auto
RTS
Hyst
Bit-1
Auto
RTS
Hyst
Bit-0
0 1 0
EFR
RD/WR
Rsrvd
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 REGISTERS DESCRIPTION. 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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