W90221X Winbond Electronics Corp America, W90221X Datasheet - Page 163
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W90221X
Manufacturer Part Number
W90221X
Description
Pa-risc Embedded Controller
Manufacturer
Winbond Electronics Corp America
Datasheet
1.W90221X.pdf
(220 pages)
- Current page: 163 of 220
- Download datasheet (3Mb)
Line Control Register (LCR)
Port address : 0xf00003fb (COM0)
Default : 0x0
Bits 0 Divisor Latch Access Bit
Bit 1 Break Control Bit
to the Spacing State
transmitter logic.
Bit 2 Stick Parity Enable
Bit 3 Even Parity Enable
Bit 4 Parity Bit Enable
Bit 5 Number of "Stop bit"
W90221X version 0.6
DLAB BREAK SPAR
0
When this bit is set to a logic 1, the serial data output (SOUT) is forced
(logic 0). This bit affects SOUT only and has no effect on the
This bit has effects only when bit-4 (Parity Bit Enable) is set.
This bit has effects only when bit-4 (Parity Bit Enable) is set.
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).
0 = Disable Stick Parity
1 = The parity bit is transmitted and checked as a logic 1 if bit-3=0
(odd parity), or
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.
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
0xf00002fb (COM1)
1
as a logic 0 if bit-3=1 (even parity).
the serial data.
2
EPAR
3
PAR
4
STOP
Read/Write Power-on
5
6
WLEN
7
- 163 -
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