UPD78F9234MC-5A4-A Renesas Electronics America, UPD78F9234MC-5A4-A Datasheet - Page 239

• Manufacturer Part Number: UPD78F9234MC-5A4-A
• Description: MCU 8BIT 8KB FLASH 30PIN
• Manufacturer: Renesas Electronics America
• Series: 78K0S/Kx1+r

Specifications of UPD78F9234MC-5A4-A

• Core Processor: 78K0S
• Core Size: 8-Bit
• Speed: 10MHz
• Connectivity: LIN, UART/USART
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 24
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 5.5 V
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

The vector interrupt enable state is set for INTP0, INTP1, and INTTMH1.
(Interrupt priority INTP0 > INTP1 > INTTMH1 (refer to Table13-1))
INTP0 interrupt was first masked.
performed.
13.4.3 Interrupt request pending
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).
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 registers 0, 1 (IF0, IF1)
Manipulation instruction for interrupt mask flag registers 0, 1 (MK0, MK1)
INTTMH1
Main processing
Example 3. A priority is controlled by the multiple interrupts
EI
Figure 13-10. Example of Multiple Interrupts (2/2)
IE = 0
CHAPTER 13 INTERRUPT FUNCTIONS
User’s Manual U17446EJ5V0UD
INTP0
INTP1
INTTNH1 servicing
PMK0 = 1
PMK0 = 0
RETI
EI
IE = 0
IE = 0
INTP1 servicing
INTP0 servicing
RETI
RETI
237