xe8802 Semtech Corporation, xe8802 Datasheet - Page 91

• Manufacturer Part Number: xe8802
• Description: Data Acquisition Soc With 16+10 Bit Zoomingadc? Embedded Risc Controller And Lcd Driver
• Manufacturer: Semtech Corporation

14.1 Features
•
• Internal baudrate generator with 10 programmable baudrates (300 - 153600).
• 7 or 8 bits word length.
• Even, odd, or no-parity bit generation and detection
• 1 stop bit
• Error receive detection: Start, Parity, Frame and Overrun
• Receiver echo mode
• 2 interrupts (receive full and transmit empty)
• Enable receive and/or transmit
• Invert pad Rx and/or Tx
14.2 Overview
The Uart pins are PB[7], which is used as Rx - receive and PB[6] as Tx - transmit.
14.3 Registers map
© Semtech 2006
Full duplex operation with buffered receiver and transmitter.
pos.
pos.
5-3
2-0
7
6
2
1
0
7
6
5
4
3
UartRcSel(2:0)
RegUartCmd
RegUartCtrl
UartBR(2:0)
UartEnRx
UartEcho
UartEnTx
UartXRx
UartXTx
UartPM
UartWL
UartPE
SelXtal
-
r/w
r/w
r/w
r/w
r/w
r/w
r/w
r/w
r/w
r/w
r/w
rw
rw
r
000 nresetglobal
101 nresetglobal
XE8802 Sensing Machine Data Acquisition MCU
0 nresetglobal
0 nresetglobal
0 nresetglobal
1 nresetglobal
0 nresetglobal
0 nresetglobal
0 nresetglobal
0 nresetglobal
0 nresetglobal
RegUartCtrl
RegUartCmd
RegUartTx
RegUartTxSta
RegUartRx
RegUartRxSta
reset
reset
Table 14-1: Uart registers
Table 14-2: RegUartCmd
Table 14-3: RegUartCtrl
0
register name
14-2
with ZoomingADC™ and LCD driver
Select input clock: 0 = RC/external, 1 = xtal
Enable parity: 1 = with parity, 0 = no parity
Select word length: 1 = 8 bits, 0 = 7 bits
Select parity mode: 1 = odd, 0 = even
1 = echo Rx->Tx, 0 = no echo
Enable uart transmission
RC prescaler selection
Enable uart reception
Enable echo mode:
Select baud rate
Invert pad Rx
Invert pad Tx
description
description
Unused
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