REV. 1.4.3 18 TIMERMSB [31:24] and TIMERLSB [23:16] TIMERMSB and TIMERLSB form a 16-bit value. The least-sign" />
參數(shù)資料
型號: XR17C158IV-F
廠商: Exar Corporation
文件頁數(shù): 10/67頁
文件大?。?/td> 0K
描述: IC UART PCI BUS OCTAL 144LQFP
標準包裝: 60
特點: *
通道數(shù): 8
FIFO's: 64 字節(jié)
規(guī)程: RS485
電源電壓: 4.5 V ~ 5.5 V
帶自動流量控制功能:
帶IrDA 編碼器/解碼器:
帶故障啟動位檢測功能:
帶調(diào)制解調(diào)器控制功能:
安裝類型: 表面貼裝
封裝/外殼: 144-LQFP
供應(yīng)商設(shè)備封裝: 144-LQFP(20x20)
包裝: 托盤
其它名稱: 1016-1646
XR17C158IV-F-ND
XR17C158
xr
5V PCI BUS OCTAL UART
REV. 1.4.3
18
TIMERMSB [31:24] and TIMERLSB [23:16]
TIMERMSB and TIMERLSB form a 16-bit value. The least-significant bit of the timer is bit [0] of the TIMERLSB
with most-significant-bit being bit [7] in TIMERMSB. Notice that these registers do not hold the current counter
value when read. Reading the TIMERCNTL register will clear its interrupt. Default value is zero (timer disabled)
upon powerup and reset.
1.2.3
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 and logic 1 selects 8X sampling rate. Transmit and receive data rates will double by
selecting 8X sampling rate.
1.2.4
REGA [15:8] Reserved
1.2.5
RESET [23:16] (default 0x00)
The 8-bit 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 19 for details. Bit-0 =1 resets UART channel 0 while
bit-7=1 resets channel 7.
TIMERMSB Register
Bit-15 Bit-14 Bit-13 Bit-12 Bit-11 Bit-10
Bit-9 Bit-8
TIMERLSB Register
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1 Bit-0
16-Bit Timer/Counter Programmable Registers
Ch-6
Ch-7
Ch-5 Ch-4 Ch-3 Ch-2 Ch-1 Ch-0
8XMODE Register
Individual UART Channel 8X Clock Mode Enable
Bit-7 Bit-6 Bit-5 Bit-4 Bit-3 Bit-2 Bit-1 Bit-0
Ch-6
Ch-7
Ch-5 Ch-4 Ch-3 Ch-2 Ch-1 Ch-0
RESET Register
Individual UART Channel Reset Enable
Bit-7 Bit-6 Bit-5 Bit-4 Bit-3 Bit-2 Bit-1 Bit-0
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