参数资料
型号: XR17V252IM-F
厂商: Exar Corporation
文件页数: 13/69页
文件大小: 0K
描述: IC UART PCI BUS DUAL 100TQFP
标准包装: 90
特点: *
通道数: 2,DUART
FIFO's: 64 字节
规程: RS485
电源电压: 3.3V,5V
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: 100-TQFP
供应商设备封装: 100-TQFP(14x14)
包装: 托盘
XR17V252
20
66 MHZ PCI BUS DUAL UART WITH POWER MANAGEMENT SUPPORT
REV. 1.0.2
1.6.3
8XMODE [7:0] (default 0x00)
Each bit selects 8X or 16X sampling rate for that UART channel, bit-0 is channel 0. Logic 0 (default) selects
normal 16X sampling with logic one selects 8X sampling rate. Transmit and receive data rates will double by
selecting 8X.
1.6.4
REGA [15:8] Reserved
1.6.5
RESET [23:16] - (default 0x00)
Bits 0 to 1 of the Reset register [RESET] provides the software with the ability to reset the UART(s) when there
is a need. Each bit is self-resetting after it is written a logic 1 to perform a reset to that channel. All registers in
that channel will be reset to the default condition, see Table 21 for details. Bit-0 =1 resets UART channel 0
while bit-1=1 resets channel 1.
1.6.6
SLEEP [31:24] (default 0x00)
FIGURE 8. INTERRUPT OUTPUT (ACTIVE LOW) IN ONE-SHOT AND RE-TRIGGERABLE MODES
One-shot Mode
Timer Started
Timer Timed
Out
TIMERCNTL
read
Re-triggerable
Mode
Timer Timed
Out
TIMERCNTL
read
Timer Timed
Out
Rsvd
Rsvd Rsvd Rsvd Rsvd Ch-1 Ch-0
8XM O DE Register
Individual UART Channel 8X Clock Mode Enable
B it-7 Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1 Bit-0
Rsvd
Rsvd Rsvd Rsvd Rsvd Ch-1 Ch-0
RESET Register
Individual U A R T C hannel Reset E nable
B it-7 B it-6
B it-5
B it-4
B it-3
B it-2
B it-1
B it-0
SLEEP Register
Individual UART Channel Sleep Enable
Bit-7 Bit-6 Bit-5 Bit-4 Bit-3 Bit-2 Bit-1 Bit-0
Rsvd
Rsvd Rsvd Ch-1 Ch-0
Rsvd Rsvd Rsvd
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