R5F21102DFP#U0 Renesas Electronics America, R5F21102DFP#U0 Datasheet - Page 157

• Manufacturer Part Number: R5F21102DFP#U0
• Description: IC R8C MCU FLASH 8K 32LQFP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M16C/R8C/Tiny/10r

Specifications of R5F21102DFP#U0

• Core Processor: R8C
• Core Size: 16-Bit
• Speed: 16MHz
• Connectivity: SIO, UART/USART
• Peripherals: LED, WDT
• Number Of I /o: 22
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-LQFP
• For Use With: R0K521134S000BE - KIT EVAL STARTER FOR R8C/13R0E521134EPB00 - KIT EMULATOR PROBE FOR PC7501R0E521134CPE00 - EMULATOR COMPACT R8C/13
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/10 Group
Rev.1.20 Jan 27, 2006
REJ09B0019-0120
Figure 17.3 shows the FMR0 register. Figure 17.4 shows the FMR1 and FMR4 registers.
• FMR00 Bit
• FMR01 Bit
• FMSTP Bit
• FMR06 Bit
• FMR07 Bit
• FMR11 Bit
• FMR40 bit
• FMR41 bit
• FMR46 bit
• FMR02 Bit
This bit indicates the operating status of the flash memory. The bit is “0” during programming, eras-
ing, or erase-suspend mode; otherwise, the bit is “1”.
The microcomputer is made ready to accept commands by setting the FMR01 bit to “1” (CPU rewrite
mode).
The Block1 and Block0 do not accept the Program and Block Erase commands if the FMR02 bit is
set to “0” (rewrite disabled).
This bit is provided for initializing the flash memory control circuits, as well as for reducing the amount
of current consumed in the flash memory. The flash memory is disabled against access by setting
the FMSTP bit to “1”. Therefore, the FMSTP bit must be written to by a program in other than the
flash memory.
In the following cases, set the FMSTP bit to “1”:
Figure 17.6 shows a flow chart to be followed before and after entering on-chip oscillator mode (main
clock stop).
Note that when going to stop or wait mode while the CPU rewrite mode is disabled, the FMR0
register does not need to be set because the power for the flash memory is automatically turned off
and is turned back on again after returning from stop or wait mode.
This is a read-only bit indicating the status of auto program operation. The bit is set to “1” when a
program error occurs; otherwise, it is cleared to “0”. For details, refer to the description of the full
status check.
This is a read-only bit indicating the status of auto erase operation. The bit is set to “1” when an erase
error occurs; otherwise, it is set to “0”. For details, refer to the description of "17.4.5 Full status
check".
Setting this bit to “1” (EW1 mode) places the microcomputer in EW1 mode.
The erase-suspend function is enabled by setting the FMR40 bit to “1” (valid).
In EW0 mode, the flash module goes to erase-suspend mode when the FMR41 bit is set to “1”. In
EW1 mode, the FMR41 bit is automatically set to “1” (erase-suspend requested) when an enabled
interrupt occurred, and then the flash module goes to erase-suspend mode.
The auto-erase operation restarts when the FMR41 bit is set to “0” (erase restart).
The FMR46 bit is set to “0”(disables reading) during auto-erase execution and set to “1”(enables
reading) during erase-suspend mode. Do not access to the flash memory when this bit is set to “0”.
• When flash memory access resulted in an error while erasing or programming in EW0 mode
• When entering on-chip oscillator mode (main clock stop).
(FMR00 bit not reset to “1” (ready))
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17.4 CPU Rewrite Mode