R5F21238DFP#U0 Renesas Electronics America, R5F21238DFP#U0 Datasheet - Page 514

• Manufacturer Part Number: R5F21238DFP#U0
• Description: IC R8C/23 MCU FLASH 48-LQFP
• Manufacturer: Renesas Electronics America
• Series: R8C/2x/23r

Specifications of R5F21238DFP#U0

• Core Size: 16/32-Bit
• Program Memory Size: 64KB (64K x 8)
• Peripherals: POR, Voltage Detect, WDT
• Core Processor: R8C
• Speed: 20MHz
• Connectivity: CAN, I²C, LIN, SIO, SSU, UART/USART
• Number Of I /o: 41
• Program Memory Type: FLASH
• Ram Size: 3K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 12x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 48-LQFP
• No. Of I/o's: 41
• Ram Memory Size: 3KB
• Cpu Speed: 20MHz
• No. Of Timers: 4
• Digital Ic Case Style: LQFP
• Embedded Interface Type: CAN, I2C, UART
• Rohs Compliant: Yes
• Cpu Family: R8C
• Device Core Size: 16b
• Frequency (max): 20MHz
• Interface Type: I2C/UART
• Total Internal Ram Size: 3KB
• # I/os (max): 41
• Number Of Timers - General Purpose: 5
• Operating Supply Voltage (typ): 3.3/5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 3V
• On-chip Adc: 12-chx10-bit
• Instruction Set Architecture: CISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 48
• Package Type: LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: RCDK8C - KIT DEV EVAL FOR CAN R8C/23R0K521237S000BE - KIT DEV RSK R8C/23R0E521237CPE00 - EMULATOR COMPACT R8C/20/21/22/23
• Eeprom Size: -
• Lead Free Status / Rohs Status: Compliant

R8C/22 Group, R8C/23 Group
Rev.2.00 Aug 20, 2008
REJ09B0251-0200
Table 22.6
NOTES:
Mode
EW1 During automatic erasing
22.9.1.4
22.9.1.5
22.9.1.6
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
Write 0 to the corresponding bits before writing 1 when setting the FMR01, FMR02, or FMR11 bit to 1. Do not
generate an interrupt between writing 0 and 1.
In EW0 mode, if the power supply voltage drops while rewriting any block in which the rewrite control
program is stored, the flash memory may not be able to be rewritten because the rewrite control program cannot
be rewritten correctly. In this case, use standard serial I/O mode.
Do not write additions to the already programmed address.
address match interrupt is allocated on ROM.
vector is allocated block 0.
(erase-suspend function
is enabled)
During automatic erasing
(erase-suspend function
is disabled)
During automatic
programming
(program suspend
function enabled)
Auto programming
(program suspend
function disabled)
EW1 Mode Interrupts
How to Access
Rewriting User ROM Area
Program
Status
Page 492 of 501
The auto-erasing is suspended
after td(SR-SUS) and the
interrupt process is executed.
The auto-erasing can be
restarted by setting the FMR41
bit in the FMR4 register to 0
(erase restart) after the
interrupt process completes.
The auto-erasing has a priority
and the interrupt request
acknowledgement is waited.
The interrupt process is
executed after the auto-erasing
completes.
The auto-programming is
suspended after td(SR-SUS)
and the interrupt process is
executed. The auto-
programming can be restarted
by setting the FMR42 bit in the
FMR4 register to 0 (program
restart) after the interrupt
process completes.
The auto-programming has a
priority and the interrupt
request acknowledgement is
waited. The interrupt process is
executed after the auto-
programming completes.
Request is Acknowledged
When Maskable Interrupt
Stop Detection and Voltage Monitor 2
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 using the erase-suspend
function.
Interrupt Request are Acknowledged
When Watchdog Timer, Oscillation
22. Usage Notes