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參數資料
型號: W90221F
廠商: WINBOND ELECTRONICS CORP
英文描述: PA-RISC Embedded Micro-Controller(惠普PA-RISC結構的32位嵌入式微控制器)
中文描述: PA - RISC的嵌入式微控制器(惠普的PA - RISC結構的32位嵌入式微控制器)
文件頁數: 122/174頁
文件大小: 2102K
代理商: W90221F
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The above information is the exclusive intellectual property of Winbond Electronics and shall not be disclosed, distributed or reproduced without permission from Winbond.
122
Versi on 0. 4, March/2000
Port address : 0xf00003fb (COM0)
0xf00002fb (COM1)
Read/Write
Power-on Default : 0x0
0
1
2
3
4
5
6
7
DLAB
BREAK
SPAR
EPAR
PAR
STOP
WLEN
Bits 0 Divisor Latch Access Bit
0 = "2F8/3F8" and "2F9/3F9" are used to access RBR, THR or IER.
1 = "2F8/3F8" and "2F9/3F9" are used to access Divisor Latch Registers (DLL, DLM).
Bit 1
Break Control Bit
When this bit is set to a logic 1, the serial data output (SOUT) is forced to the
Spacing State
(logic 0). This bit affects SOUT only and has no effect on the transmitter logic.
Bit 2
Stick Parity Enable
0 = Disable Stick Parity
1 = The parity bit is transmitted and checked as a logic 1 if bit-3=0 (odd parity), or
as a logic 0 if bit-3=1 (even parity).
This bit has effects only when bit-4 (Parity Bit Enable) is set.
Bit 3
Even Parity Enable
0 = Odd number of logic 1s is transmitted or checked in the data word bits and parity bit.
1 = Even number of logic 1s is transmitted or checked in the data word bits and parity bit.
This bit has effects only when bit-4 (Parity Bit Enable) is set.
Bit 4
Parity Bit Enable
0 = Praity bit is not generated (transmit data) or checked (receive data) during transfer.
1 = Parity bit is generated of checked between the "last data word bit" and "stop bit" of
the serial data.
Bit 5
Number of "Stop bit"
0 = One "stop bit" is generated in the transmitted data.
1 =
One and a half
"stop bit" is generated in the transmitted data when
5-bit
word length
is selected.
Two
"stop bit" is generated when
6-, 7-
and
8-bit
word length is selected.
Bits 6-7 Word Length Select
LCR[6:7]
0 0
Character length
5 bits
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