R5F21257SNFP#U0 Renesas Electronics America, R5F21257SNFP#U0 Datasheet - Page 426

• 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
Figure 19.6
Flash Memory Control Register 1
b7 b6 b5 b4
NOTES:
1
1.
2.
3.
To set this bit to 1, set it to 1 immediately after setting it first to 0 w hile the FMR01 bit is set to 1 (CPU rew rite mode
enable). Do not generate an interrupt betw een setting the bit to 0 and setting it to 1.
This bit is set to 0 by setting the FMR01 bit to 0 (CPU rew rite mode disabled).
When the FMR01 bit is set to 1 (CPU rew rite mode enabled), bits FMR15 and FMR16 can be w ritten to.
To set this bit to 0, set it to 0 immediately after setting it first to 1.
To set this bit to 1, set it to 1.
Feb 29, 2008
0
b3 b2
0
0
FMR1 Register
b1 b0
Bit Symbol
(b4-b2)
Symbol
FMR15
FMR16
FMR11
FMR1
(b0)
(b7)
Page 407 of 485
—
—
—
Reserved bit
EW1 mode select bit
Reserved bits
Block 0 rew rite disable bit
Block 1 rew rite disable bit
Reserved bit
Address
Bit Name
01B5h
(1, 2)
(2,3)
(2,3)
When read, the content is undefined.
0 : EW0 mode
1 : EW1 mode
Set to 0.
0 : Enables rew rite
1 : Disables rew rite
0 : Enables rew rite
1 : Disables rew rite
Set to 1.
After Reset
1000000Xb
Function
19. Flash Memory
RW
RW
RW
RW
RW
RW
RO