參數資料
型號： XR17C158
廠商： Exar Corporation
英文描述： PCI Bus Octal UART(八通用異步接收器/發(fā)送器（滿足通訊系統(tǒng)中PCI總線和高帶寬要求）)
中文描述： PCI總線八路的UART（八通用異步接收器/發(fā)送器（滿足通訊系統(tǒng)中的PCI總線和高帶寬要求））
文件頁數： 35/51頁
文件大?。?/td> 685K
代理商： XR17C158
XR17C158
PCI BUS OCTAL UART
PRELIMINARY
REV. 1.0.0
35
Line Control Register (LCR)
The Line Control Register is used to specify the asyn-
chronous data communication format. The word or
character length, the number of stop bits, and the
parity are selected by writing the appropriate bits in
this register.
LCR[1-0]: TX and RX Word Length Select
These two bits specify the word length to be transmit-
ted or received.
LCR[2]: TX and RX Stop-bit Length Select
The length of stop bit is specified by this bit in con-
junction with the programmed word length.
LCR[3]: TX and RX Parity Select
Parity or no parity can be selected via this bit. The
parity bit is a simple way used in communications for
data integrity check. See
Table 14
for parity selection
summary below.
Logic 0 = No parity.
Logic 1 = A parity bit is generated during the trans-
mission while the receiver checks for parity error of
the data character received.
LCR[4]: TX and RX Parity Select
If the parity bit is enabled with LCR bit-3 set to a logic
1, LCR BIT-4 selects the even or odd parity format.
Logic 0 = ODD Parity is generated by forcing an odd
number of logic 1’s in the transmitted character. The
receiver must be programmed to check the same for-
mat. (default).
Logic 1 = EVEN Parity is generated by forcing an
even the number of logic 1’s in the transmitted
character. The receiver must be programmed to
check the same format.
LCR[5]: TX and RX Parity Select
If the parity bit is enabled, LCR BIT-5 selects the
forced parity format.
LCR BIT-5 = logic 0, parity is not forced. (default)
LCR BIT-5 = logic 1 and LCR BIT-4 = logic 0, parity
bit is forced to a logical 1 for the transmit and
receive data.
LCR BIT-5 = logic 1 and LCR BIT-4 = logic 1, parity
bit is forced to a logical 0 for the transmit and
receive data.
LCR[6]: Transmit Break Enable
When enabled the Break control bit it causes a
break condition to be transmitted (the TX output is
forced to a “space’, logic 0, state). This condition
remains until disabled by setting LCR bit-6 to a
logic 0.
Logic 0 = No TX break condition. (default)
Logic 1 = Forces the transmitter output (TX) to a
“space”, logic 0, for alerting the remote receiver of
a line break condition.
LCR[7]: Baud Rate Divisors Enable
Baud rate generator divisor (DLL/DLM) enable.
Logic 0 = Data registers are selected. (default)
Logic 1 = Divisor latch registers are selected.
Modem Control Register (MCR) or General Pur-
pose Outputs Control.
This register controls the serial interface signals with
the modem or a peripheral device.
Modem Control Register (MCR)
The MCR register is used for controlling the modem
interface signals or general purpose inputs/outputs.
MCR[0]: DTR# Pins
The DTR# pin may be used for automatic hardware
flow control enabled by EFR bit-6 and MCR bit-2=1. If
the modem interface is not used, this output may be
used for general purpose.
Logic 0 = Force DTR# output to a logic 1. (default)
Logic 1 = Force DTR# output to a logic 0.
MCR[1]: RTS# Pins
The RTS# pin may be used for automatic hardware
flow control by enabled by EFR bit-6 and MCR bit-
BIT-1
BIT-0
W
ORD
LENGTH
0
0
1
1
0
1
0
1
5 (default)
6
7
8
BIT-2
W
ORD
LENGTH
S
TOP
BIT
LENGTH
(B
IT
TIME
(
S
))
0
1
1
5,6,7,8
5
6,7,8
1 (default)
1-1/2
2
T
ABLE
14: P
ARITY
SELECTION
LCR B
IT
-5 LCR B
IT
-4 LCR B
IT
-3
P
ARITY
SELECTION
X
0
0
1
1
X
0
1
0
1
0
1
1
1
1
No parity
Odd parity
Even parity
Force parity to mark, “1”
Forced parity to space,
“0”
相關PDF資料
PDF描述
XR17D152 UNIVERSAL (3.3V AND 5V) PCI BUS DUAL UART
XR17D152CM UNIVERSAL (3.3V AND 5V) PCI BUS DUAL UART
XR17D152IM UNIVERSAL (3.3V AND 5V) PCI BUS DUAL UART
XR17D158IV UNIVERSAL (3.3V AND 5V) PCI BUS OCTAL UART
XR17D158 UNIVERSAL (3.3V AND 5V) PCI BUS OCTAL UART
相關代理商/技術參數
參數描述
XR17C158CV 功能描述:UART 接口集成電路 UART RoHS:否 制造商:Texas Instruments 通道數量:2 數據速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel
XR17C158CV-0A-EVB 功能描述:UART 接口集成電路 Supports C158 144 ld TQFP, PCI Interface RoHS:否 制造商:Texas Instruments 通道數量:2 數據速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel
XR17C158CV-F 功能描述:UART 接口集成電路 UART RoHS:否 制造商:Texas Instruments 通道數量:2 數據速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel
XR17C158CVTR-F 制造商:Exar Corporation 功能描述:UART 8-CH 64Byte FIFO 5V 144-Pin LQFP T/R 制造商:Exar Corporation 功能描述:XR17C158CVTR-F
XR17C158IV 功能描述:UART 接口集成電路 UART RoHS:否 制造商:Texas Instruments 通道數量:2 數據速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel
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