UPD78F0034BGC-8BS-A Renesas Electronics America, UPD78F0034BGC-8BS-A Datasheet - Page 420

• 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

Example 3. Nesting does not occur because interrupts are not enabled
is not acknowledged and nesting does not take place. The INTyy interrupt request is held pending, and is
acknowledged following execution of one main processing instruction.
418
Interrupts are not enabled during servicing of interrupt INTxx (EI instruction is not issued), so interrupt request INTyy
PR = 0:
IE = 0:
Higher priority level
Interrupt request acknowledgment disabled
(PR = 0)
INTxx
1 instruction execution
Main processing
EI
Figure 19-13. Nesting Examples (2/2)
CHAPTER 19 INTERRUPT FUNCTIONS
User’s Manual U14046EJ5V0UD
IE = 0
IE = 1
(PR = 0)
INTyy
INTxx servicing INTyy servicing
IE = 0
IE = 1
RETI
RETI