参数资料
型号: XE8801AMI000WP
厂商: Semtech
文件页数: 109/135页
文件大小: 0K
描述: SENSING MACHINE WITH 16 + 10 BIT
标准包装: 558
系列: XE880x
应用: 感测机
核心处理器: Coolrisc816?
程序存储器类型: 闪存(22 kB)
控制器系列: XE8000
RAM 容量: 512 x 8
接口: UART,USRT
输入/输出数: 24
电源电压: 2.4 V ~ 5.5 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 模具
包装: 托盘
配用: XE8000MP-ND - PROG BOARD AND PROSTART2 CARD
其它名称: Q2722595
Semtech 2005
www.semtech.com
14-3
XE8801A – SX8801R
pos.
RegUartTxSta
rw
reset
description
7-2
-
r
000000
Unused
1
UartTxBusy
r
0 resetsystem
Uart busy transmitting
0
UartTxFull
r
0 resetsystem
RegUartTx full
Set by writing to RegUartTx
Cleared when transferring RegUartTx into
internal shift register
Table 14-4: RegUartTxSta
pos.
RegUartRx
rw
reset
description
7-0
UartRx
r
00000000
resetsystem
Received data
Table 14-5: RegUartRx
pos.
RegUartRxSta
rw
Reset
description
7-6
-
r
00
Unused
5
UartRxSErr
r
0 resetsystem
Start error
4
UartRxPErr
r
0 resetsystem
Parity error
3
UartRxFErr
r
0 resetsystem
Frame error
2
UartRxOErr
rc
0 resetsystem
Overrun error
Cleared by writing RegUartRxSta
1
UartRxBusy
r
0 resetsystem
Uart busy receiving
0
UartRxFull
r
0 resetsystem
RegUartRx full
Cleared by reading RegUartRx
Table 14-6: RegUartRxSta
14.4
Interrupts map
interrupt source
default mapping in the interrupt manager
Irq_uart_Tx
IrqHig(1)
Irq_uart_Rx
IrqHig(0)
Table 14-7: Interrupts map
14.5 Uart baud rate selection
In order to have correct baud rates, the Uart interface has to be fed with a stable and trimmed clock source. The
clock source can be the RC oscillator or the crystal oscillator. The precision of the baud rate will depend on the
precision of the selected clock source.
14.5.1
Uart on the RC oscillator
To select the RC oscillator for the Uart, the bit SelXtal in RegUartCmd has to be 0.
In order to obtain a correct baud rate, the RC oscillator frequency has to be set to one of the frequencies given in
the table below. The precision of the obtained baud rate is directly proportional to the frequency deviation with
respect to the values in the table.
Not
Recommended
for
New
Designs
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