REV. 1.0.3 2.25V TO 3.6V QUAD UART WITH 16-BYTE FIFO 2.2 Device Reset The RESET input resets the internal regist" />
參數(shù)資料
型號(hào)： XR16V554IV-0A-EVB
廠商： Exar Corporation
文件頁(yè)數(shù)： 3/43頁(yè)
文件大?。?/td> 0K
描述： EVAL BOARD FOR XR16V554 64LQFP
標(biāo)準(zhǔn)包裝： 1
系列： *
XR16V554/554D
11
REV. 1.0.3
2.25V TO 3.6V QUAD UART WITH 16-BYTE FIFO
2.2
Device Reset
The RESET input resets the internal registers and the serial interface outputs in all channels to their default
state (see Table 13). An active high pulse of longer than 40 ns duration will be required to activate the reset
function in the device. Following a power-on reset or an external reset, the V554 is software compatible with
previous generation of UARTs, 16C454 and 16C554.
2.3
Channel Selection
The UART provides the user with the capability to bi-directionally transfer information between an external
CPU and an external serial communication device. During Intel Bus Mode (16/68# pin is connected to VCC), a
logic 0 on chip select pins, CSA#, CSB#, CSC# or CSD# allows the user to select UART channel A, B, C or D
to configure, send transmit data and/or unload receive data to/from the UART. Selecting all four UARTs can be
useful during power up initialization to write to the same internal registers, but do not attempt to read from all
four uarts simultaneously. Individual channel select functions are shown in Table 1.
TABLE 1: CHANNEL A-D SELECT IN 16 MODE
CSA#
FUNCTION
1
UART de-selected
0
1
Channel A selected
1
0
1
Channel B selected
1
0
1
Channel C selected
1
0
Channel D selected
0
Channels A-D selected
During Motorola Bus Mode (16/68# pin is connected to GND), the package interface pins are configured for
connection with Motorola, and other popular microprocessor bus types. In this mode the V554 decodes two
additional addresses, A3 and A4, to select one of the four UART ports. The A3 and A4 address decode
function is used only when in the Motorola Bus Mode. See Table 2.
TABLE 2: CHANNEL A-D SELECT IN 68 MODE
CS#
FUNCTION
1
X
UART de-selected
0
Channel A selected
0
1
Channel B selected
0
1
0
Channel C selected
0
1
Channel D selected
CSB# CSC# CSD#
A4
A3
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XR16V554IV80 制造商:EXAR 制造商全稱(chēng):EXAR 功能描述:2.25V TO 3.6V QUAD UART WITH 16-BYTE FIFO
XR16V554IV80-0A-EB 功能描述:界面開(kāi)發(fā)工具 Supports V554 80 ld LQFP,ISA Interface RoHS:否 制造商:Bourns 產(chǎn)品:Evaluation Boards 類(lèi)型:RS-485 工具用于評(píng)估:ADM3485E 接口類(lèi)型:RS-485 工作電源電壓:3.3 V
XR16V554IV80-F 功能描述:UART 接口集成電路 2.25V-3.6V 16B FIFO temp -45 to 85C;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
XR16V554IV80TR-F 功能描述:UART 接口集成電路 XR16V554IV80TR-F 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
XR16V554IV-F 功能描述:通用總線(xiàn)函數(shù) UART RoHS:否 制造商:Texas Instruments 邏輯類(lèi)型:CMOS 邏輯系列:74VMEH 電路數(shù)量:1 開(kāi)啟電阻（最大值）: 傳播延遲時(shí)間:10.1 ns 電源電壓-最大:3.45 V 電源電壓-最小:3.15 V 最大工作溫度:+ 85 C 最小工作溫度:0 C 封裝 / 箱體:TSSOP-48 封裝:Reel
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