参数资料
型号: XR16L784CV-F
厂商: Exar Corporation
文件页数: 30/51页
文件大小: 0K
描述: IC UART 8B 3.3V QUAD 64LQFP
标准包装: 160
特点: *
通道数: 4,QUART
FIFO's: 64 字节
规程: RS485
电源电压: 2.97 V ~ 5.5 V
带自动流量控制功能:
带IrDA 编码器/解码器:
带故障启动位检测功能:
带调制解调器控制功能:
安装类型: 表面贴装
封装/外壳: 64-LQFP
供应商设备封装: 64-LQFP(10x10)
包装: 托盘
其它名称: 1016-1281
XR16L784
36
HIGH PERFORMANCE 2.97V TO 5.5V QUAD UART
REV. 1.2.3
4.11
SCRATCH PAD REGISTER (SPR) - Read/Write
This is a 8-bit general purpose register for the user to store temporary data. The content of this register is
preserved during sleep mode but becomes 0xFF (default) after a reset or a power off-on cycle.
4.12
FEATURE CONTROL REGISTER (FCTR) - Read/Write
This register controls the UART enhanced functions that are not available on ST16C554 or ST16C654.
FCTR [3:0] - Auto RTS/DTR Flow Control Hysteresis Select
These bits select the auto RTS/DTR flow control hysteresis and only valid when TX and RX Trigger Table-D is
selected (FCTR bit-6 and 7 are set to logic 1). The RTS/DTR hysteresis is referenced to the RX FIFO trigger
level. After reset, these bits are set to logic 0 selecting the next FIFO trigger level for hardware flow control.
below shows the 16 selectable hysteresis levels.
TABLE 16: AUTO RS485 HALF-DUPLEX DIRECTION CONTROL DELAY FROM TRANSMIT-TO-RECEIVE
MSR[7]
MSR[6]
MSR[5]
MSR[4]
DELAY IN DATA BIT(S) TIME
0
1
0
1
0
2
0
1
3
0
1
0
4
9
1
0
1
5
0
1
0
6
0
1
7
1
0
8
1
0
1
9
1
0
1
0
10
1
0
1
11
1
0
12
1
0
1
13
1
0
14
1
15
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