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参数资料
| 型号： | XR68C92IV-F |
| 厂商： | Exar Corporation |
| 文件页数： | 17/33页 |
| 文件大小： | 0K |
| 描述： | DUAL CHANNEL UART 44LQFP |
| 标准包装： | 160 |
| 特点： | * |
| 通道数： | 2，DUART |
| FIFO's： | 16 字节 |
| 电源电压： | 2.97 V ~ 5.5 V |
| 带自动流量控制功能： | 是 |
| 带CMOS： | 是 |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 44-LQFP |
| 供应商设备封装： | 44-LQFP（10x10） |
| 包装： | 托盘 |
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XR68C92/192
24
Rev. 1.33
PROGRAMMING EXAMPLES
The following examples show how to initialize the XR68C92/192 for various operating conditions:
A) The first example will initialize channel A of an XR68C92 device for regular RX/TX. The operating parameters
will be 9600 baud, 8 word length, no parity and 1 stop bit.
Operation
Register
Value
Remarks
Write
CRA
0x20
; reset RX (receiver)
Write
CRA
0x30
; reset TX (transmitter)
Write
CRA
0x40
; reset error status
Write
CRA
0xB0
; reset MR pointer to MR0
Write
MR0A
0x00
; use normal baud rate table. Now MR pointer points to MR1
Write
MR1A
0x13
; select word length & parity. Now MR pointer points to MR2
Write
MR2A
0x07
; normal mode (not loopback) & 1 stop bit
Write
CSRA
0xBB
; 9600 baud for RX & TX - clock source is XTAL1
Write
CRA
0x05
; enable RX & TX
Read
SRA
; should get a value 0x0C
B) This example will show how to use hardware flow control for both RX (RTS via OP0) and TX (CTS via IP0):
Write
CRA
0x10
; reset MR pointer to MR1
Write
MR1A
0x93
; select auto RTS control. The -RTS signal is sent via output OP0
Write
MR2A
0x17
; select auto CTS control. The input IP0 serves as the -CTS signal
C) This example will configure clock sources for TX and RX of both channels and C/T. Specifically, XTAL1 will be used
as channel A's TX clock; IP4 as channel A's 16X RX clock; IP5 as channel B's 1X TX clock and XTAL1 as channel
B's RX clock. Also, the C/T will be initialized in the timer mode and IP2 will be used as its clock source. Some
of these will be programmed to appear at the multi-purpose output pins:
Write
ACR
0x40
; C/T initialized in timer mode & IP2 chosen as its clock source
; also, bit-7 = 0, therefore baud rate Set1 has been selected
Write
CTPU
0x00
; It is essential to program CTPU & CTPL before programming OP3
Write
CTPL
0x05
; as C/T output (see below)
Write
CSRA
0xEB
; channel A RX clock source: IP4-16X, TX clock source: XTAL1 (if MR0A
; bits 2 and 0 = 0, the TX baud rate is 9600)
Write
CSRB
0xBF
; channel B RX clock source: XTAL1 (9600 baud), TX clock source: IP5-1X
Read
STCR
; Start the C/T
Write
OPCR
0x06
; C/T output appears at OP3 and channel A's TX 1X clock (this is XTAL1
; clock divided by 16) at OP2.
D) The next example will show how to configure and run channel B's transmitter in a multi-drop application. Note
that all other relevant parameters should be configured already, like baud rate etc.
Write
CRB
0x10
; reset MR pointer to MR1
Write
MR1B
0x1B
; word length = 8 and use A/D tag in the place of parity
Write
CRB
0x04
; Enable transmitter of channel B
Write
TXB
address
; Send the address first (A/D tag = 1)
Write
CRB
0x10
; reset MR pointer to MR1
Write
MR1B
0x13
; change A/D tag = 0
Write
TXB
data
; You can load the data (A/D tag = 0) immediately after the address. There is no
; need to wait till the transmitter is empty. Load all the data. Check to see if the
Read
SRB
; transmitter is empty & ready. You need to do this before you can load the next
; address. Repeat the last 5 steps to load different addresses and their data.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| XR68C92IVTR-F | 制造商:Exar Corporation 功能描述:UART 2-CH 8Byte FIFO 3.3V/5V 44-Pin LQFP T/R 制造商:Exar Corporation 功能描述:XR68C92IVTR-F |
| XR68M752 | 制造商:EXAR 制造商全称:EXAR 功能描述:HIGH PERFORMANCE DUART WITH 64-BYTE FIFO |
| XR68M752IB-0A-EVB | 功能描述:界面开发工具 Eval Board for XR68M752IB-0A RoHS:否 制造商:Bourns 产品:Evaluation Boards 类型:RS-485 工具用于评估:ADM3485E 接口类型:RS-485 工作电源电压:3.3 V |
| XR68M752IB-0B-EVB | 功能描述:界面开发工具 Eval Board for XR68M752IB Series RoHS:否 制造商:Bourns 产品:Evaluation Boards 类型:RS-485 工具用于评估:ADM3485E 接口类型:RS-485 工作电源电压:3.3 V |
| XR68M752IB49 | 制造商:EXAR 制造商全称:EXAR 功能描述:HIGH PERFORMANCE DUART WITH 64-BYTE FIFO |
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