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參數資料
型號： W83877AF
廠商： WINBOND ELECTRONICS CORP
元件分類： 外設及接口
英文描述： Multi-Function I/O Port Controller(多功能輸入／輸出口控制器)
中文描述： MULTIFUNCTION PERIPHERAL, PQFP100
封裝： QFP-100
文件頁數： 47/171頁
文件大小： 1634K
代理商： W83877AF
W83877AF
Publication Release Date: Sep. 1996
Preliminary Version 0.50
- 45 -
4.2 Register Address
TABLE 4-1 UART Register Bit Map
Bit Number
Register Address Base
0
1
2
3
4
5
6
7
8
BDLAB = 0
Receiver
Buffer
Register
(Read Only)
RBR
RX Data
Bit 0
RX Data
Bit 1
RX Data
Bit 2
RX Data
Bit 3
RX Data
Bit 4
RX Data
Bit 5
RX Data
Bit 6
RX Data
Bit 7
8
BDLAB = 0
Transmitter
Buffer Register
(Write Only)
TBR
TX Data
Bit 0
TX Data
Bit 1
TX Data
Bit 2
TX Data
Bit 3
TX Data
Bit 4
TX Data
Bit 5
TX Data
Bit 6
TX Data
Bit 7
9
BDLAB = 0
Interrupt Control
Register
ICR
RBR Data
Ready
Interrupt
Enable
(ERDRI)
TBR
Empty
Interrupt
Enable
(ETBREI)
USR
Interrupt
Enable
(EUSRI)
HSR
Interrupt
Enable
(EHSRI)
0
0
0
0
A
Interrupt Status
Register
(Read Only)
ISR
"0" if
Interrupt
Pending
Interrupt
Status
Bit (0)
Interrupt
Status
Bit (1)
Interrupt
Status
Bit (2)**
0
0
FIFOs
Enabled
**
FIFOs
Enabled
**
A
UART FIFO
Control
Register
(Write Only)
UFR
FIFO
Enable
RCVR
FIFO
Reset
XMIT
FIFO
Reset
DMA
Mode
Select
Reserved
Reversed
RX
Interrupt
Active Level
(LSB)
RX
Interrupt
Active Level
(MSB)
B
UART Control
Register
UCR
Data
Length
Select
Bit 0
(DLS0)
Data
Length
Select
Bit 1
(DLS1)
Multiple
Stop Bits
Enable
(MSBE)
Parity
Bit
Enable
(PBE)
Even
Parity
Enable
(EPE)
Parity
Bit Fixed
Enable
PBFE)
Set
Silence
Enable
(SSE)
Baud rate
Divisor
Latch
Access Bit
(BDLAB)
C
Handshake
Control
Register
HCR
Data
Terminal
Ready
(DTR)
Request
to
Send
(RTS)
Loopback
RI
Input
IRQ
Enable
Internal
Loopback
Enable
0
0
0
D
UART Status
Register
USR
RBR Data
Ready
(RDR)
Overrun
Error
(OER)
Parity Bit
Error
(PBER)
No Stop
Bit
Error
(NSER)
Silent
Byte
Detected
(SBD)
TBR
Empty
(TBRE)
TSR
Empty
(TSRE)
RX FIFO
Error
Indication
(RFEI) **
E
Handshake
Status Register
HSR
CTS
Toggling
(TCTS)
DSR
Toggling
(TDSR)
RI Falling
Edge
(FERI)
DCD
Toggling
(TDCD)
Clear
to Send
(CTS)
Data Set
Ready
(DSR)
Ring
Indicator
(RI)
Data Carrier
Detect
(DCD)
F
User Defined
Register
UDR
Bit 0
Bit 1
Bit 2
Bit 3
Bit 4
Bit 5
Bit 6
Bit 7
8
BDLAB = 1
Baudrate Divisor
Latch Low
BLL
Bit 0
Bit 1
Bit 2
Bit 3
Bit 4
Bit 5
Bit 6
Bit 7
9
BDLAB = 1
Baudrate
Divisor Latch
High
BHL
Bit 8
Bit 9
Bit 10
Bit 11
Bit 12
Bit 13
Bit 14
Bit 15
*: Bit 0 is the least significant bit. The least significant bit is the first bit serially transmitted or received.
**: These bits are always 0 in 16450 mode.
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