R5F21334CNFP#U0 Renesas Electronics America, R5F21334CNFP#U0 Datasheet - Page 531

MCU 1KB FLASH 16K ROM 32-LQFP

R5F21334CNFP#U0

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

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
-

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R8C/33C Group
REJ09B0570-0100 Rev.1.00 Dec. 14, 2009
Page 501 of 589
30.4.4
Notes:
After Reset
1. To set this bit to 1, first write 0 and then 1 immediately. Disable interrupts and DTC activation between writing 0
2. To set the FMR21 bit to 0 (erase restart), set it when the FMR01 bit in the FMR0 register is set to 1 (CPU rewrite
3. Set the FMR27 bit to 1 after setting either of the following:
FMR20 Bit (Erase-Suspend Enable Bit)
FMR21 Bit (Erase-Suspend Request Bit)
Bit
b0
b1
b2
b3
b4
b5
b6
b7
Address 01B6h
[Condition for setting to 0]
Set to 0 by a program.
[Conditions for setting to 1]
and writing 1.
mode enabled).
• Set the CPU clock to the low-speed on-chip oscillator clock divided by 4, 8, or 16.
• Set the CPU clock to the XCIN clock divided by 1 (no division), 2, 4, or 8.
Enter wait mode or stop mode after setting the FMR27 bit to 0 (low-current-consumption read mode disabled).
Do not enter wait mode or stop mode while the FMR27 bit is 1 (low-current-consumption read mode enabled).
When the FMR20 bit is set to 1 (enabled), the erase-suspend function is enabled.
When the FMR21 bit is set to 1, erase-suspend mode is entered. If the FMR22 bit is set to 1 (erase-suspend
request enabled by interrupt request), the FMR21 bit is automatically set to 1 (erase-suspend request) when an
interrupt request for the enabled interrupt is generated, and erase-suspend mode is entered. To restart auto-
erasure, set the FMR21 bit to 0 (erase restart).
Symbol
When the FMR22 bit is set to 1 (erase-suspend request enabled by interrupt request) at the time an interrupt is
generated.
Set to 1 by a program.
Symbol
FMR20 Erase-suspend enable bit
FMR21 Erase-suspend request bit
FMR22 Interrupt request suspend
FMR27 Low-current-consumption
Bit
Flash Memory Control Register 2 (FMR2)
FMR27
b7
0
request enable bit
Nothing is assigned. If necessary, set to 0. When read, the content is 0.
Reserved bits
read mode enable bit
b6
0
Bit Name
(1)
b5
0
(1, 3)
(1)
(2)
b4
0
0: Erase-suspend disabled
1: Erase-suspend enabled
0: Erase restart
1: Erase-suspend request
0: Erase-suspend request disabled by interrupt request
1: Erase-suspend request enabled by interrupt request
Set to 0.
0: Low-current-consumption read mode disabled
1: Low-current-consumption read mode enabled
b3
0
FMR22
b2
0
Function
FMR21
b1
0
FMR20
b0
0
30. Flash Memory
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W

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