UPD78F1009GB-GAH-AX Renesas Electronics America, UPD78F1009GB-GAH-AX Datasheet - Page 902

• Manufacturer Part Number: UPD78F1009GB-GAH-AX
• Description: MCU 16BIT 78K0R/KX3-L 64-LQFP
• Manufacturer: Renesas Electronics America
• Series: 78K0R/Kx3-Lr

Specifications of UPD78F1009GB-GAH-AX

• Core Processor: 78K/0R
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: 3-Wire SIO, I²C, LIN, UART/USART
• Peripherals: DMA, LVD, POR, PWM, WDT
• Number Of I /o: 50
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Ram Size: 3K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 12x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

78K0R/Kx3-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.
R01UH0106EJ0300 Rev.3.00
Oct 01, 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 = 00: Specify level 0 with ××PR1× = 0, ××PR0× = 0 (higher priority level)
PR = 01: Specify level 1 with ××PR1× = 0, ××PR0× = 1
PR = 10: Specify level 2 with ××PR1× = 1, ××PR0× = 0
PR = 11: Specify level 3 with ××PR1× = 1, ××PR0× = 1 (lower priority level)
IE = 0:
IE = 1:
Interrupt request acknowledgment is disabled
Interrupt request acknowledgment is enabled.
INTxx
(PR = 11)
Main processing
EI
Figure 18-15. Examples of Multiple Interrupt Servicing (1/2)
INTxx
(PR = 10)
1 instruction execution
Main processing
IE = 1
IE = 0
EI
INTyy
(PR = 10)
INTxx servicing
RETI
EI
IE = 1
INTyy
(PR = 11)
IE = 0
IE = 0
IE = 1
INTxx servicing
IE = 1
IE = 0
INTzz
(PR = 01)
RETI
EI
INTyy servicing
RETI
EI
CHAPTER 18 INTERRUPT FUNCTIONS
INTyy servicing
RETI
IE = 1
IE = 0
INTzz servicing
RETI
902