UPD78F0034BGC-8BS-A Renesas Electronics America, UPD78F0034BGC-8BS-A Datasheet - Page 304

• Manufacturer Part Number: UPD78F0034BGC-8BS-A
• Description: MCU 8-Bit 78K0 CISC 32KB Flash 2.5V/3.3V/5V 64-Pin LQFP
• Manufacturer: Renesas Electronics America

Specifications of UPD78F0034BGC-8BS-A

• Package: 64LQFP
• Family Name: 78K0
• Maximum Speed: 12 MHz
• Ram Size: 1 KB
• Program Memory Size: 32 KB
• Operating Supply Voltage: 2.5|3.3|5 V
• Data Bus Width: 8 Bit
• Program Memory Type: Flash
• Number Of Programmable I/os: 51
• Interface Type: 3-Wire/UART
• On-chip Adc: 8-chx10-bit
• Operating Temperature: -40 to 85 °C
• Number Of Timers: 3

(4) Asynchronous serial interface status register 0 (ASIS0)
(5) Transmission controller
(6) Reception controller
302
Address: FFA1H After reset: 00H
When a receive error occurs in UART mode, this register indicates the type of error.
ASIS0 can be read by an 8-bit memory manipulation instruction.
RESET input clears ASIS0 to 00H.
Notes 1. Even if the stop bit length is set to two bits by setting bit 2 (SL0) of asynchronous serial interface mode
The transmission controller controls transmit operations, such as adding a start bit, parity bit, and stop bit to data
that is written to transmit shift register 0 (TXS0), based on the values set to asynchronous serial interface mode
register 0 (ASIM0).
The reception controller controls receive operations based on the values set to asynchronous serial interface
mode register 0 (ASIM0). During a receive operation, it performs error checking, such as for parity errors, and
sets various values to asynchronous serial interface status register 0 (ASIS0) according to the type of error that
is detected.
Symbol
ASIS0
2. When an overrun error has occurred, further overrun errors will continue to occur until the contents
Figure 16-3. Format of Asynchronous Serial Interface Status Register 0 (ASIS0)
register 0 (ASIM0), stop bit detection during a receive operation only applies to a stop bit length of
1 bit.
of receive buffer register 0 (RXB0) are read.
OVE0
PE0
FE0
7
0
0
1
0
1
0
1
No parity error
Parity error
(Transmit data parity not matched)
No framing error
Framing error
(Stop bit not detected)
No overrun error
Overrun error
(Next receive operation was completed before data was read from receive buffer register
0 (RXB0))
6
0
CHAPTER 16 SERIAL INTERFACE UART0
R
Note 2
Note 1
5
0
User’s Manual U14046EJ5V0UD
4
0
Framing error flag
Overrun error flag
Parity error flag
3
0
PE0
2
FE0
1
OVE0
0