upd70f3017ay Renesas Electronics Corporation., upd70f3017ay Datasheet - Page 295

• Manufacturer Part Number: upd70f3017ay
• Description: V850/sa1tm 32-/16-bit Single-chip Microcontroller
• Manufacturer: Renesas Electronics Corporation.

(2) Asynchronous serial interface (UART) mode
(n = 0, 1)
After reset: 00H
This mode enables full-duplex operation in which one byte of data is transmitted and received after the start bit.
The on-chip dedicated UARTn baud rate generator enables communications using a wide range of selectable
baud rates.
The UARTn baud rate generator can also be used to generate a MIDI-standard baud rate (31.25 kbps).
(a) Register settings
ASIMn
Cautions 1. Do not switch the operation mode until after the current serial transmit/receive operation
UART mode settings are made via asynchronous serial interface mode register n (ASIMn), asynchronous
serial interface status register n (ASISn), baud rate generator control register n (BRGCn), baud rate generator
mode control registers n and 01 (BRGMCn, BRGMC01) (n = 0, 1).
2. Be sure to set bit 0 to 0.
ISRMn
TXEn
TXEn
PS1n
CLn
SLn
7
0
1
1
0
0
1
1
0
1
0
1
0
1
has stopped.
R/W
7 bits
8 bits
1 bit
2 bits
Receive completion interrupt is issued when an error occurs
Receive completion interrupt is not issued when an error occurs
RXEn
RXEn
PS0n
6
1
0
1
0
1
0
1
CHAPTER 10
Figure 10-25. ASIMn Setting (UART Mode)
UART mode (receive only)
UART mode (transmit only)
UART mode (transmit and receive)
No parity
Zero parity always added during transmission
No parity detection during reception (parity errors do not occur)
Odd parity
Even parity
PS1n
User’s Manual U12768EJ4V1UD
Address: FFFFF300H, FFFFF310H
5
Receive completion interrupt control when error occurs
SERIAL INTERFACE FUNCTION
Operation mode
Stop bit length specification for transmit data
PS0n
4
Character length specification
Parity bit specification
CLn
3
RXDn/Pxx pin function
Serial function
Port function
Serial function
SLn
2
ISRMn
1
TXDn/Pxx pin function
Port function
Serial function
Serial function
0
0
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