参数资料
型号: XR16M680IB25-0C-EB
厂商: Exar Corporation
文件页数: 20/57页
文件大小: 0K
描述: EVAL BOARD FOR XR16M680-C 25BGA
标准包装: 1
系列: *
XR16M680
27
REV. 1.0.0
1.62V TO 3.63V HIGH PERFORMANCE UART WITH 32-BYTE FIFO
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
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 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
DLD[7:6]
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
BRG
select
Enable
Indepen-
dent
BRG
4X Mode 8X Mode
Bit-3
Bit-2
Bit-1
Bit-0
LCR[7] = 1
LCR
≠0xBF
EFR[4] = 1
Enhanced Registers
0 0 0
FC
RD
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
LCR=0XBF
0 0 1
FCTR
RD/WR
RX/TX
select
Swap
SCR
0
RS485
interrupt
mode
invert
RX IR
0
0 1 0
EFR
RD/WR
Auto
CTS#
Enable
Auto
RTS#
Enable
Special
Char
Select
Enable
IER [7:4],
ISR [5:4],
FCR[5:3],
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 7: 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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