R5F21257SNFP#U0 Renesas Electronics America, R5F21257SNFP#U0 Datasheet - Page 133

• Manufacturer Part Number: R5F21257SNFP#U0
• Description: IC R8C/25 MCU FLASH 52LQFP
• Manufacturer: Renesas Electronics America
• Series: R8C/2x/25r

Specifications of R5F21257SNFP#U0

• Core Processor: R8C
• Core Size: 16/32-Bit
• Speed: 20MHz
• Connectivity: I²C, LIN, SIO, SSU, UART/USART
• Peripherals: POR, Voltage Detect, WDT
• Number Of I /o: 41
• Program Memory Size: 48KB (48K x 8)
• Program Memory Type: FLASH
• Ram Size: 2.5K x 8
• Voltage - Supply (vcc/vdd): 2.2 V ~ 5.5 V
• Data Converters: A/D 12x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 52-LQFP
• For Use With: R0K521256S000BE - KIT EVAL STARTER FOR R8C/25
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/24 Group, R8C/25 Group
Rev.3.00
REJ09B0244-0300
Figure 12.11
12.1.6.10 Interrupt Priority Judgement Circuit
The interrupt priority judgement circuit selects the highest priority interrupt, as shown in Figure 12.11.
Feb 29, 2008
Interrupt Priority Level Judgement Circuit
Priority level of interrupt
NOTE:
1. The IICSEL bit in the PMR register switches functions.
Oscillation stop detection
Voltage monitor 1
Voltage monitor 2
UART1 transmit
UART0 transmit
SSU / I
Watchdog timer
UART1 receive
UART0 receive
A/D conversion
Address match
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Timer RD0
Timer RD1
Timer RB
Timer RA
Timer RE
Key input
INT3
INT0
INT1
INT2
I flag
IPL
2
C bus
(1)
Level 0 (default value)
Highest
Lowest
Priority of peripheral function interrupts
(if priority levels are same)
Interrupt request level
judgment output signal
Interrupt request
acknowledged
12. Interrupts