UPD78F0552MA-FAA-AX Renesas Electronics America, UPD78F0552MA-FAA-AX Datasheet - Page 647

• Manufacturer Part Number: UPD78F0552MA-FAA-AX
• Description: MCU 8BIT 16-SSOP
• Manufacturer: Renesas Electronics America
• Series: 78K0/Kx2-Lr

Specifications of UPD78F0552MA-FAA-AX

• Core Processor: 78K/0
• Core Size: 8-Bit
• Speed: 10MHz
• Connectivity: I²C, LIN, UART/USART
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 9
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Ram Size: 768 x 8
• Voltage - Supply (vcc/vdd): 1.8 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: -

78K0/Kx2-L
servicing takes place. Before each interrupt request is acknowledged, the EI instruction must always be issued to enable
interrupt request acknowledgment.
that of INTxx, and multiple interrupt servicing does not take place. The INTyy interrupt request is held pending, and is
acknowledged following execution of one main processing instruction.
R01UH0028EJ0400 Rev.4.00
Sep 27, 2010
Example 1. Multiple interrupt servicing occurs twice
During servicing of interrupt INTxx, two interrupt requests, INTyy and INTzz, are acknowledged, and multiple interrupt
Example 2. Multiple interrupt servicing does not occur due to priority control
Interrupt request INTyy issued during servicing of interrupt INTxx is not acknowledged because its priority is lower than
PR = 0: Higher priority level
PR = 1: Lower priority level
IE = 0:
Interrupt request acknowledgment disabled
INTxx
(PR = 1)
Main processing
EI
Figure 17-28. Examples of Multiple Interrupt Servicing (1/2)
INTxx
(PR = 0)
1 instruction execution
Main processing
IE = 1
IE = 0
EI
INTyy
(PR = 0)
INTxx servicing
RETI
EI
IE = 1
INTyy
(PR = 1)
IE = 0
IE = 0
IE = 1
INTxx servicing
IE = 1
IE = 0
INTzz
(PR = 0)
RETI
EI
INTyy servicing
RETI
EI
CHAPTER 17 INTERRUPT FUNCTIONS
INTyy servicing
RETI
IE = 1
IE = 0
INTzz servicing
RETI
633