R5F21236KFP#U0 Renesas Electronics America, R5F21236KFP#U0 Datasheet - Page 513

• Manufacturer Part Number: R5F21236KFP#U0
• Description: IC R8C/23 MCU FLASH 48LQFP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M16C/R8C/Tiny/23r

Specifications of R5F21236KFP#U0

• Core Processor: R8C
• Core Size: 16-Bit
• Speed: 16MHz
• Connectivity: CAN, I²C, LIN, SIO, SSU, UART/USART
• Peripherals: POR, Voltage Detect, WDT
• Number Of I /o: 41
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 12x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 48-LQFP
• For Use With: RCDK8C - KIT DEV EVAL FOR CAN R8C/23R0E521237CPE00 - EMULATOR COMPACT R8C/20/21/22/23
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/22 Group, R8C/23 Group
Rev.2.00 Aug 20, 2008
REJ09B0251-0200
22.9
22.9.1
Table 22.5
NOTES:
Mode
EW0 During automatic erasing Any interrupt can be used
22.9.1.1
22.9.1.2
22.9.1.3
1. Do not use the address match interrupt while the command is executed because the vector of the
2. Do not use the non-maskable interrupt while block 0 is automatically erased because the fixed
Before entering CPU rewrite mode (EW0 mode), select 5 MHz or below for the CPU clock using the CM06 bit
in the CM0 register and the CM16 to CM17 bits in the CM1 register. This usage note is not needed for EW1
mode.
The following instructions cannot be used in EW0 mode because the flash memory internal data is referenced:
UND, INTO, and BRK instructions.
Table 22.5 lists the EW0 Mode Interrupts and Table 22.6 lists the EW1 Mode Interrupts.
address match interrupt is allocated on ROM.
vector is allocated block 0.
Notes on Flash Memory
Automatic writing
CPU Rewrite Mode
Operating Speed
Prohibited Instructions
EW0 Mode Interrupts
Interrupts
Status
Page 491 of 501
by allocating a vector to
RAM
When Maskable Interrupt
Acknowledged
Request is
Once an interrupt request is acknowledged,
the auto-programming or auto-erasing is
forcibly stopped immediately and resets the
flash memory. An interrupt process starts
after the fixed period and the flash memory
restarts. Since the block during the auto-
erasing or the address during the auto-
programming is forcibly stopped, the
normal value may not be read. Execute the
auto-erasing again and ensure the auto-
erasing is completed normally.
Since the watchdog timer does not stop
during the command operation, the
interrupt request may be generated. Reset
the watchdog timer regularly.
Detection and Voltage Monitor 2 Interrupt
When Watchdog Timer, Oscillation Stop
Request are Acknowledged
22. Usage Notes