R5F21334CNFP#U0 Renesas Electronics America, R5F21334CNFP#U0 Datasheet - Page 535

• Manufacturer Part Number: R5F21334CNFP#U0
• Description: MCU 1KB FLASH 16K ROM 32-LQFP
• Manufacturer: Renesas Electronics America
• Series: R8C/3x/33Cr

Specifications of R5F21334CNFP#U0

• Core Processor: R8C
• Core Size: 16/32-Bit
• Speed: 20MHz
• Connectivity: I²C, LIN, SIO, SSU, UART/USART
• Peripherals: POR, PWM, Voltage Detect, WDT
• Number Of I /o: 27
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Ram Size: 1.5K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 12x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 32-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/33C Group
REJ09B0570-0100 Rev.1.00 Dec. 14, 2009
Page 505 of 589
Figure 30.4
Figure 30.5
30.4.8
EW0 Mode Execution Procedure
(When Rewriting User ROM)
Figure 30.4 shows How to Set and Exit EW0 Mode and Figure 30.5 shows How to Set and Exit EW0 Mode
(When Rewriting Data Flash) and EW1 Mode.
FMR01: Bit in FMR0 register
Note:
Transfer the rewrite mode program that uses
CPU rewrite mode to the RAM
Jump to the rewrite control program transferred
to the RAM
(The subsequent process is executed by the
rewrite control program in the RAM)
To set the FMR01 bit to 1, first write 0 and then 1 immediately. Disable interrupts and DTC activation between writing 0 and writing 1.
Writing to the FMR01 bit must be performed in the RAM.
How to Set and Exit Each Mode
How to Set and Exit EW0 Mode
How to Set and Exit EW0 Mode (When Rewriting Data Flash) and EW1 Mode
EW0 Mode Execution Procedure (When Rewriting Data Flash)
EW1 Mode Execution Procedure
FMR01, FMR02: Bits in FMR0 register
Notes:
1. To set the FMR01 bit to 1, first write 0 and then 1 immediately.
2. Not required when rewriting the data flash in EW0 mode.
Disable interrupts and DTC activation between writing 0 and writing 1.
After writing 0 to the FMR01 bit,
write 1 (CPU rewrite mode enabled)
After writing 0 to the FMR02 bit,
write 1 (EW1 mode)
Write 0 (CPU rewrite mode disabled) to
the FMR01 bit
Execute software commands
Program in ROM
Rewrite control program
(2)
Jump to the specified address in the flash memory
After writing 0 to the FMR01 bit,
write 1 (CPU rewrite mode enabled)
Write 0 (CPU rewrite mode disabled) to
the FMR01 bit
Execute software commands
(1)
30. Flash Memory
(1)