UPD78F0034BGC-8BS-A Renesas Electronics America, UPD78F0034BGC-8BS-A Datasheet - Page 316

• 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

(2) Communication operations
314
(a) Data format
Figure 16-8 shows the format of the transmit/receive data.
1 data frame consists of the following bits.
• Start bit ............. 1 bit
• Character bits ... 7 bits or 8 bits (LSB first)
• Parity bit ........... Even parity, odd parity, zero parity, or no parity
• Stop bit(s) ......... 1 bit or 2 bits
Asynchronous serial interface mode register 0 (ASIM0) is used to set the character bit length, parity selection,
and stop bit length within each data frame.
When “7 bits” is selected as the number of character bits, only the lower 7 bits (bits 0 to 6) are valid, so that
during a transmission the highest bit (bit 7) is ignored and during reception the highest bit (bit 7) must be
cleared to 0.
Baud rate generator control register 0 (BRGC0) is used to set the serial transfer rate.
If a receive error occurs, information about the receive error can be ascertained by reading asynchronous
serial interface status register 0 (ASIS0).
Figure 16-8. Example of Transmit/Receive Data Format in Asynchronous Serial Interface
Start
bit
D0
D1
CHAPTER 16 SERIAL INTERFACE UART0
D2
User’s Manual U14046EJ5V0UD
Character bits
D3
1 data frame
D4
D5
D6
D7
Parity
bit
Stop bit