參數(shù)資料
型號(hào)： 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(yè)數(shù)： 31/51頁(yè)
文件大?。?/td> 685K
代理商： XR17C158
XR17C158
PCI BUS OCTAL UART
PRELIMINARY
REV. 1.0.0
31
4.7.2
Receiver Operation with FIFO
4.8
4.8.1
The receive holding register is a 8-bit register that
holds a receive data byte from the receive shift regis-
ter (RSR). It provides the receive data interface to the
host processor. The host reads the receive data byte
on this register whenever a data byte is trasferred
from the RSR. RHR also part of the receive FIFO of
R
EGISTERS
Receive Holding Register (RHR)
64 bytes by 11-bit wide, 3 extra bits are for the error
flags to be in LSR register. When the FIFO is enabled
by FCR bit-0, it acts as the first-out register of the
FIFO as new data are put over the first-in register.
The receive FIFO pointer is bumped after the RHR
register is read. Also, the error flags associated with
the data byte are immediately updated onto the line
status register (LSR) bits 1-4.
F
IGURE
14. R
ECEIVER
O
PERATION
IN
NON
-FIFO M
ODE
Receive Data Shift
Register (RSR)
Receive
Data Byte
and Errors
RHR Interrupt (ISR bit-2)
Receive Data
Holding Register
(RHR)
RXFIFO1
16X or 8X Clock
(8XMODE Register)
Receive Data Characters
Data Bit
Validation
Error
Flags in
LSR bits
4:2
F
IGURE
15. R
ECEIVER
O
PERATION
IN
FIFO
AND
F
LOW
C
ONTROL
M
ODE
Receive Data Shift
Register (RSR)
RXFIFO1
16X or 8X Sampling
Clock (8XMODE Reg.)
E
(
E
L
64 bytes by 11-
bit wide FIFO
Receive Data Characters
FIFO Trigger=48
Example:
- FIFO trigger level set at 48 bytes
- RTS/DTR hyasteresis set at +/-8 chars.
Data fills to 56
Data falls to 40
Data Bit
Validation
Receive Data
FIFO
(64-byte)
Receive
Data
Receive Data
Byte and Errors
RHR Interrupt (ISR bit-2) is programmed
at FIFO trigger level (RXTRG).
FIFO is Enable by FCR bit-0=1
RTS#/DTR# de-asserts when data fills above
the trigger level to suspend remote transmitter.
Enable by EFR bit-6=1, MCR bit-2.
RTS#/DTR# re-asserts when data falls below
the trigger level to restart remote transmitter.
Enable by EFR bit-6=1, MCR bit-2.
相關(guān)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(guān)代理商/技術(shù)參數(shù)
參數(shù)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(shù)量:2 數(shù)據(jù)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(shù)量:2 數(shù)據(jù)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(shù)量:2 數(shù)據(jù)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(shù)量:2 數(shù)據(jù)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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