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參數(shù)資料
型號(hào)： XR19L220IL40-0B-EB
廠(chǎng)商： Exar Corporation
文件頁(yè)數(shù)： 23/43頁(yè)
文件大?。?/td> 0K
描述： EVAL BOARD FOR XR19L202 40QFN
標(biāo)準(zhǔn)包裝： 1
系列： *
XR19L220
3
REV. 1.0.2
SINGLE CHANNEL INTEGRATED UART AND RS-232 TRANSCEIVER
PIN DESCRIPTIONS
Pin Descriptions
NAME
40-QFN
PIN#
TYPE
DESCRIPTION
DATA BUS INTERFACE (CMOS/TTL Voltage Levels)
A2
A1
A0
23
24
25
I
Address bus lines [2:0]. These 3 address lines select one of the internal registers in the
UART during a data bus transaction.
D7
D6
D5
D4
D3
D2
D1
D0
8
7
5
38
37
36
35
34
I/O
Data bus lines [7:0] (bidirectional).
IOR#
(NC)
19
I
When I/M# pin is HIGH, the Intel bus interface is selected and this input becomes read
strobe (active LOW). The falling edge instigates an internal read cycle and retrieves the
data byte from an internal register pointed by the address lines [A2:A0], puts the data byte
on the data bus to allow the host processor to read it on the rising edge.
When I/M# pin is LOW, the Motorola bus interface is selected and this input is not used.
IOW#
(R/W#)
17
I
When I/M# pin is HIGH, it selects Intel bus interface and this input becomes write strobe
(active LOW). The falling edge instigates the internal write cycle and the rising edge trans-
fers the data byte on the data bus to an internal register pointed by the address lines.
When I/M# pin is LOW, the Motorola bus interface is selected and this input becomes read
(HIGH) and write (LOW) signal.
CS#
9
I
This input is chip select (active LOW) to enable the device.
INT
(IRQ#)
26
O
(OD)
When I/M# pin is HIGH, it selects Intel bus interface and this output become the active
HIGH device interrupt output. This output is enabled through the software setting of MCR[3]:
set to the active mode when MCR[3] is set to a logic 1, and set to the three state mode when
MCR[3] is set to a logic 0. See MCR[3].
When I/M# pin is LOW, it selects Motorola bus interface and this output becomes the active
LOW, open-drain interrupt output. An external pull-up resistor is required for proper opera-
tion. MCR[3] must be set to a logic 0 for proper operation of the interrupt.
MODEM OR SERIAL I/O INTERFACE (EIA-232/RS-232 Voltage Levels)
TXD
10
O
UART Transmit Data. The TX signal will be LOW (< -5.0V) during reset or idle (no data).
RXD
2
I
UART Receive Data. The RX data input must idle LOW (< -3.0V).
RTS
11
O
UART Request-to-Send or general purpose output. This output must be asserted prior to
using auto RTS flow control, see EFR[6], MCR[1] and IER[6].
CTS
1
I
UART Clear-to-Send or general purpose input. It can be used for auto CTS flow control,
see EFR[7], MSR[4] and IER[7]. This input has an internal pull-down resistor and can be left
unconnected when not used.
DTR
12
O
UART Data-Terminal-Ready or general purpose output.
DSR
3
I
UART Data-Set-Ready or general purpose input. This input has an internal pull-down resis-
tor and can be left unconnected when not used.
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參數(shù)描述
XR19L220IL40-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
XR19L222 制造商:EXAR 制造商全稱(chēng):EXAR 功能描述:TWO CHANNEL INTEGRATED UART AND RS-232 TRANSCEIVER
XR19L222IL64 制造商:EXAR 制造商全稱(chēng):EXAR 功能描述:TWO CHANNEL INTEGRATED UART AND RS-232 TRANSCEIVER
XR19L222IL64-0B-EB 功能描述:界面開(kāi)發(fā)工具 Supports L222 64 pin QFN, pci 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
XR19L222IL64-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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