R5F21256SNFP#ES Renesas Electronics America, R5F21256SNFP#ES Datasheet - Page 433

• Manufacturer Part Number: R5F21256SNFP#ES
• Description: MCU 2/5V 32K 52-LQFP ES SAMPLE
• Manufacturer: Renesas Electronics America
• Series: R8C/2x/25r

Specifications of R5F21256SNFP#ES

• 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: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 2K 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
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/24 Group, R8C/25 Group
Rev.3.00
REJ09B0244-0300
Figure 19.13
EW0 Mode
EW1 Mode
Feb 29, 2008
NOTES:
1. In EW0 mode, the interrupt vector table and interrupt routine for interrupts to be used should be allocated to the RAM area.
2. td(SR-SUS) is needed until the interrupt request is acknowledged after it is generated. The interrupt to enter suspend
3. When no interrupt is used, the instruction to enable interrupts is not needed.
4. td(SR-SUS) is needed until program is suspended after the FMR42 bit in the FMR4 register is set to 1.
should be in interrupt enabled status.
Program Command (When Suspend Function Enabled)
Write data to the write address
Write data to the write address
Write the command code 40h
Write the command code 40h
I = 1 (enable interrupt)
I = 1 (enable interrupt)
to the write address
Program completed
Program completed
Full status check
Full status check
FMR44 = 0 ?
FMR44 = 0 ?
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FMR40 = 1
FMR40 = 1
FMR42 = 0
Start
Start
Yes
Yes
(3)
No
No
Access flash memory
Access flash memory
Maskable interrupt
Maskable interrupt
FMR44 = 1 ?
FMR42 = 1
FMR46 = 1 ?
FMR42 = 0
REIT
REIT
Yes
Yes
(4)
(1)
(2)
No
No
Access flash memory
19. Flash Memory