UPD78F9502MA-CAC-A NEC, UPD78F9502MA-CAC-A Datasheet - Page 106

• Manufacturer Part Number: UPD78F9502MA-CAC-A
• Description: 8BIT MCU, 4K FLASH, 128B RAM, SMD
• Manufacturer: NEC

Specifications of UPD78F9502MA-CAC-A

• Controller Family/series: UPD78F
• No. Of I/o's: 8
• Ram Memory Size: 128Byte
• Cpu Speed: 10MHz
• No. Of Timers: 2
• No. Of Pwm: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 4KB
• Oscillator Type: External, Internal

The vector interrupt enable state is set for INTP0, INTP1, and INTTMH1.
(Interruption priority INTP0 > INTP1 > INTTMH1 (refer to Table8-1))
INTP0 interrupt was first masked.
performed.
8.4.3
execution of the next instruction even if the interrupt request (maskable interrupt and external interrupt) is generated
during the execution. The following shows such instructions (interrupt request pending instruction).
106
In the interrupt INTTMH1 servicing, servicing is performed such that the INTP1 interrupt is given priority, since the
Afterwards, once the interrupt mask for INTP0 is released, INTP0 processing through multiple interrupts is
IE = 0: Interrupt request acknowledgment disabled
Some instructions may keep pending the acknowledgment of an instruction request until the completion of the
Manipulation instruction for interrupt request flag register 0 (IF0)
Manipulation instruction for interrupt mask flag register 0 (MK0)
Interrupt request pending
INTTMH1
Main processing
Example 3. A priority is controlled by the Multiple interrupts
EI
Figure 8-9. Example of Multiple Interrupts (2/2)
IE = 0
CHAPTER 8 INTERRUPT FUNCTIONS
Preliminary User’s Manual U18681EJ1V0UD
INTP0
INTP1
INTTNH1 servicing
PMK0 = 1
PMK0 = 0
RETI
EI
IE = 0
IE = 0
INTP1 servicing
INTP0 servicing
RETI
RETI