UPD78F0034BGC-8BS-A Renesas Electronics America, UPD78F0034BGC-8BS-A Datasheet - Page 318

• 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

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(c) Transmission
Figure 16-9. Timing of Asynchronous Serial Interface Transmit Completion Interrupt Request
TxD0 (output)
TxD0 (output)
The transmit operation is enabled if bit 7 (TXE0) of asynchronous serial interface mode register 0 (ASIM0)
is set to 1, and the transmit operation is started when transmit data is written to transmit shift register 0 (TXS0).
A start bit, parity bit, and stop bit(s) are automatically added to the data.
Starting the transmit operation shifts out the data in TXS0, thereby emptying TXS0, after which a transmit
completion interrupt request (INTST0) is issued.
The timing of the transmit completion interrupt request is shown in Figure 16-9.
(i) Stop bit length: 1 bit
(ii) Stop bit length: 2 bits
Caution
INTST0
INTST0
Do not rewrite asynchronous serial interface mode register 0 (ASIM0) during a transmit
operation. Rewriting the ASIM0 register during a transmit operation may disable further
transmit operations (in such cases, enter a RESET to restore normal operation).
START
START
CHAPTER 16 SERIAL INTERFACE UART0
D0
D0
User’s Manual U14046EJ5V0UD
D1
D1
D2
D2
D6
D6
D7
D7
Parity
Parity
STOP
STOP