R5F21257SNFP#U0 Renesas Electronics America, R5F21257SNFP#U0 Datasheet - Page 496

• 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
Table 21.3
NOTES:
Mode
EW1 During auto-erasure
1. Do not use the address match interrupt while a command is executing because the vector of the
2. Do not use a non-maskable interrupt while block 0 is being automatically erased because the fixed
address match interrupt is allocated in ROM.
vector is allocated in block 0.
(erase-suspend
function enabled)
During auto-erasure
(erase-suspend
function disabled)
During auto-
programming
(program suspend
function enabled)
During auto-
programming
(program suspend
function disabled)
Feb 29, 2008
EW1 Mode Interrupts
Status
Page 477 of 485
Auto-erasure is suspended after
td(SR-SUS) and interrupt
handling is executed. Auto-
erasure can be restarted by
setting the FMR41 bit in the
FMR4 register to 0 (erase restart)
after interrupt handling
completes.
Auto-erasure has priority and the
interrupt request
acknowledgement is put on
standby. Interrupt handling is
executed after auto-erasure
completes.
Auto-programming is suspended
after td(SR-SUS) and interrupt
handling is executed.
Auto-programming can be
restarted by setting the FMR42 bit
in the FMR4 register to 0
(program restart) after interrupt
handling completes.
Auto-programming has priority
and the interrupt request
acknowledgement is put on
standby. Interrupt handling is
executed after auto-programming
completes.
Request is Acknowledged
When Maskable Interrupt
Once an interrupt request is
acknowledged, auto-programming or
auto-erasure is forcibly stopped
immediately and the flash memory is
reset. Interrupt handling starts after the
fixed period and the flash memory
restarts. Since the block during auto-
erasure or the address during auto-
programming is forcibly stopped, the
normal value may not be read. Execute
auto-erasure again and ensure it
completes normally.
Since the watchdog timer does not stop
during the command operation,
interrupt requests may be generated.
Reset the watchdog timer regularly
using the erase-suspend function.
Voltage Monitor 2 Interrupt Request is
Stop Detection, Voltage Monitor 1, or
When Watchdog Timer, Oscillation
Acknowledged
21. Usage Notes