NEC V850E/RS1, User Manual, Page: 404 / 852

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Chapter 12 Asynchronous Serial Interface A (UARTA)
User’s Manual U16702EE3V2UD00
12.2 Configuration
UARTA consists of the following hardware:
Remark: n = 0 to 1
The pins of asynchronous serial interface A (UARTA) function alternately as port pins. For how to select
the alternate functions, refer to the description of registers in
Chapter 4 Port Functions .
Table 12-1: Configuration of UARTA0 and UARTA1
Item Configuration
Register
UARTAn reception shift register
UARTAn reception data register (UAnRX)
UARTAn transmit shift register
UARTAn transmit data register (UAnTX)
Reception data input 2 (RXDA0, RXDA1)
Transmit data output 2 (TXDA0, TXDA1)
Baud rate clock input 2 (ASCKA0, ASCKA1)
Control register
UARTAn control register 0 to 2 (UAnCTL0 to UAnCTL2)
UARTAn option control register 0 (UAnOPT0)
UARTAn status register (UAnSTR)
Table 12-2: List of Pins of Asynchronous Serial Interface A
Pin Name Alternate-Function Pin I/O Function
RXDA0 P31/INTP7
Input
Serial receive data input (UARTA0)
RXDA1 P95 Serial receive data input (UARTA1)
TXDA0 P30
Output
Serial transmit data output (UARTA0)
TXDA1 P96 Serial transmit data output (UARTA1)
ASCKA0 P32
Input
Baud rate clock input (UARTA0)
ASCKA1 P94/CS303 Baud rate clock input (UARTA1)
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