R5F21276SNFP#U0 Renesas Electronics America, R5F21276SNFP#U0 Datasheet - Page 447

• Manufacturer Part Number: R5F21276SNFP#U0
• Description: IC R8C/27 MCU FLASH 32LQFP
• Manufacturer: Renesas Electronics America
• Series: R8C/2x/27r

Specifications of R5F21276SNFP#U0

• Core Size: 16/32-Bit
• Program Memory Size: 32KB (32K x 8)
• Core Processor: R8C
• Speed: 20MHz
• Connectivity: I²C, LIN, SIO, SSU, UART/USART
• Peripherals: LED, POR, Voltage Detect, WDT
• Number Of I /o: 25
• Program Memory Type: FLASH
• Ram Size: 1.5K 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: 32-LQFP
• No. Of I/o's: 25
• Ram Memory Size: 1.5KB
• Cpu Speed: 20MHz
• No. Of Timers: 4
• Digital Ic Case Style: LQFP
• Supply Voltage Range: 2.2V To 5.5V
• Embedded Interface Type: I2C, UART
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: R0K521276S000BE - KIT DEV RSK-R8C/26-29R0E521000EPB00 - PROBE EMULATOR FOR PC7501
• Eeprom Size: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

R8C/26 Group, R8C/27 Group
Rev.2.10
REJ09B0278-0210
21.2
21.2.1
21.2.2
21.2.3
Do not read address 00000h by a program. When a maskable interrupt request is acknowledged, the CPU reads
interrupt information (interrupt number and interrupt request level) from 00000h in the interrupt sequence. At
this time, the acknowledged interrupt IR bit is set to 0.
If address 00000h is read by a program, the IR bit for the interrupt which has the highest priority among the
enabled interrupts is set to 0. This may cause the interrupt to be canceled, or an unexpected interrupt to be
generated.
Set any value in the SP before an interrupt is acknowledged. The SP is set to 0000h after reset. Therefore, if an
interrupt is acknowledged before setting a value in the SP, the program may run out of control.
Either “L” level or an “H” level of width shown in the Electrical Characteristics is necessary for the signal input
to pins INT0, INT1, INT3 and pins KI0 to KI3, regardless of the CPU clock.
For details, refer to Table 20.21 (VCC = 5V), Table 20.27 (VCC = 3V), Table 20.33 (VCC = 2.2V), Table
20.52 (VCC = 5V), Table 20.58 (VCC = 3V) External Interrupt INTi (i = 0, 1, 3) Input.
Notes on Interrupts
Sep 26, 2008
Reading Address 00000h
SP Setting
External Interrupt and Key Input Interrupt
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21. Usage Notes