參數(shù)資料
型號： MCS7840
廠商： Electronic Theatre Controls, Inc.
英文描述： USB-2.0 to Four Serial Ports
中文描述： 的USB 2.0 4個串行端口
文件頁數(shù)： 14/41頁
文件大?。?/td> 447K
代理商： MCS7840
MCS7840
USB-2.0 to Four Serial Ports
Page 14
Rev.
1.2
Line Control Register (LCR):
The LCR speci
fi
es the data format that is common to both transmitter and receiver.
Register:
Description:
Offset:
Permissions:
Access Condition:
Default Value:
LCR
Line Control Register
3
Read/Write
0x00
Bit[7]
Bit[6]
TX
Break
Bit[5]
Force
Parity
Bit[4]
Odd/Even
Parity
Bit[3]
Parity
Enable
Bit[2]
Bit[1]
Bit[0]
Data
Length
DLE
Number of
Stop-Bits
LCR[1:0] Data Length of serial characters.
LCR[2]
Number of Stop-Bits per serial character.
LCR[5:3] Parity Type
The selected parity type will be generated
during transmission and checked by the
receiver, which may produce a parity
error as a result. In 9-bit mode parity is
disabled and LCR[5:3] are ignored.
LCR[6]
Transmission Break
Logic 0: Transmission Break Disabled.
Logic 1: Forces the transmitter data
output SOUT low to alert the
communications channel, or
sends zeroes in IrDA mode.
LCR[7]
Divisor Latch Enable
Logic 0: Accesses to DLL and DLM
registers disabled.
Logic 1: Accesses to DLL and DLM
registers enabled.
LCR[1:0]
2’b00
2’b01
2’b10
2’b11
Data Length
5 bits
6 bits
7 bits
8 bits
LCR[2]
Data Length
Number of
Stop-Bits
1
1.5
2
0
1
1
5, 6, 7, 8
5
6, 7, 8
LCR[5:3]
3’bxx0
3’b001
3’b011
3’b101
3’b111
Parity Type
No Parity
Odd Parity
Even Parity
Parity bit forced to 1
Parity bit forced to 0
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參數(shù)描述
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