參數(shù)資料
型號: XE8807AMI026TLF
廠商: Semtech
文件頁數(shù): 14/143頁
文件大?。?/td> 0K
描述: IC MCU LOW PWR MTP FLASH 32-TQFP
標準包裝: 1
系列: XE880x
應(yīng)用: 感測機
核心處理器: Coolrisc816?
程序存儲器類型: 閃存(11 kB)
控制器系列: XE8000
RAM 容量: 512 x 8
接口: UART,USRT
輸入/輸出數(shù): 24
電源電壓: 2.4 V ~ 5.5 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 32-TQFP
包裝: 標準包裝
供應(yīng)商設(shè)備封裝: 32-TQFP(7x7)
產(chǎn)品目錄頁面: 585 (CN2011-ZH PDF)
配用: XE8000MP-ND - PROG BOARD AND PROSTART2 CARD
其它名稱: XE8807AMI026DKR
Semtech 2006
www.semtech.com
15-3
XE8806A/XE8807A
pos.
RegUartTx
rw
reset
description
7-0
UartTx
r/w
00000000
nresetglobal
Data to be send
Table 15-4: RegUartTx
pos.
RegUartTxSta
rw
reset
description
7-2
-
r
000000
Unused
1
UartTxBusy
r
0 nresetglobal
Uart busy transmitting
0
UartTxFull
r
0 nresetglobal
RegUartTx full
Set by writing to RegUartTx
Cleared when transferring RegUartTx into
internal shift register
Table 15-5: RegUartTxSta
pos.
RegUartRx
rw
reset
description
7-0
UartRx
r
00000000
nresetglobal
Received data
Table 15-6: RegUartRx
pos.
RegUartRxSta
rw
reset
description
7-6
-
r
00
Unused
5
UartRxSErr
r
0 nresetglobal
Start error
4
UartRxPErr
r
0 nresetglobal
Parity error
3
UartRxFErr
r
0 nresetglobal
Frame error
2
UartRxOErr
r/c
0 nresetglobal
Overrun error
Cleared by writing RegUartRxSta
1
UartRxBusy
r
0 nresetglobal
Uart busy receiving
0
UartRxFull
r
0 nresetglobal
RegUartRx full
Cleared by reading RegUartRx
Table 15-7: RegUartRxSta
15.4
Interrupts map
interrupt source
default mapping in the interrupt manager
Irq_uart_Tx
IrqHig(1)
Irq_uart_Rx
IrqHig(0)
Table 15-8: Interrupts map
15.5
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 an external clock source, the RC oscillator or the crystal oscillator. The precision of the baud
rate will depend on the precision of the selected clock source.
15.6
UART on the RC oscillator or external clock source
To select the external clock or RC oscillator for the Uart, the bit SelXtal in RegUartCmd has to be 0. The choice
between the RC oscillator and the external clock source is made with the bit EnExtClock in RegSysClock.
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