參數(shù)資料
型號(hào)： XR16C864
廠商： Exar Corporation
元件分類： 通用總線功能
英文描述： Quad UART with RX/TX FIFO Counters and 128-byte FIFO(四通用異步接收器/發(fā)送器（帶RX/TX 先進(jìn)先出計(jì)數(shù)器和128字節(jié)先進(jìn)先出）)
中文描述： 四路與異步接收/發(fā)送FIFO的計(jì)數(shù)器和128字節(jié)的FIFO（四通用異步接收器/發(fā)送器（帶了Rx / Tx先進(jìn)先出計(jì)數(shù)器和128字節(jié)先進(jìn)先出））
文件頁數(shù)： 9/46頁
文件大?。?/td> 381K
代理商： XR16C864
XR16C864
9
Rev. 1.10
SYMBOL DESCRIPTION
-IOW
15
I
Input/Output Write. (active low strobe) - This function is associated with the
16 mode only. A logic 0 transition on this pin will transfer the contents of the
data bus (D0-D7) from the external CPU to an internal register that is defined
by address bits A0, A1 and A2. When the 68 mode is selected, this pin
functions as R/-W, see definition under R/-W.
A3-A4
17,64
I
Address 3-4 Select Bits. - When the 68 mode is selected, these pins are
used to address or select individual UART’s (provided -CS is a logic 0). In the
16 mode, these pins are reassigned as chip selects, see -CSB and -CSC.
-CS
13
I
Chip Select. (active low) - In the 68 mode, this pin functions as a multiple
channel chip enable. In this case, all four UARTs (A-D) are enabled when the
-CS pin is a logic 0. An individual UART channel is selected by the data
contents of address bits A3-A4. When the 16 mode is selected, this pin
functions as -CSA, see definition under -CS A-B.
-IRQ
12
O
Interrupt Request or Interrupt “A” - This function is associated with the 68
mode only. In the 68 mode, interrupts from UART channels A-D are WIRE-
OR’ed” internally to function as a single IRQ interrupt. This pin transitions to
a logic 0 (if enabled by the interrupt enable register) whenever a UART
channel(s) requires service. Individual channel interrupt status can be
determined by addressing each channel through its associated internal
register, using -CS and A3-A4. In the 68 mode an external pull-up resistor
must be connected between this pin and Vcc. The function of this pin
changes to INTA when operating in the 16 mode, see definition under INTA.
TxDRQ A-B
TxDRQ C-D
5,25
56,81
(EMSR register bit-2 = 1)
Transmit DMA Request. A Transmit empty request is indicated by a high
level on TxDRQ. TxDRQ ine s held high until either TC pulses, or the TX FIFO
is filled to above its trigger level.
O
RxDRQ A-B
RxDRQ C-D
100,31
50,82
(EMSR register bit-3 = 1)
Receive DMA Request. A Receive ready request is indicated by a high level
on RxDRQ. RxDRQ line is held high until either TC pulses, or the RX FIFO
is emptied.
O
Symbol
Pin
100
Signal
type
Pin Description
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XR16C864CQ 制造商:Rochester Electronics LLC 功能描述: 制造商:Exar Corporation 功能描述:
XR16C864CQ-0A-EVB 功能描述:UART 接口集成電路 Supports C864 100 ld QFP, ISA 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
XR16C864CQ-0B-EB 功能描述:界面開發(fā)工具 Eval Board for XR16C864CQ Series RoHS:否 制造商:Bourns 產(chǎn)品:Evaluation Boards 類型:RS-485 工具用于評(píng)估:ADM3485E 接口類型:RS-485 工作電源電壓:3.3 V
XR16C864CQ-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
XR16C864CQTR-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
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