R5F21191SP#U0 Renesas Electronics America, R5F21191SP#U0 Datasheet - Page 204

• Manufacturer Part Number: R5F21191SP#U0
• Description: IC R8C MCU FLASH 8K 20SSOP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M16C/R8C/Tiny/19r

Specifications of R5F21191SP#U0

• Core Processor: R8C
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: SIO, UART/USART
• Peripherals: LED, POR, Voltage Detect, WDT
• Number Of I /o: 13
• Program Memory Size: 4KB (4K x 8)
• Program Memory Type: FLASH
• Ram Size: 384 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 4x1b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 20-SSOP
• For Use With: R0K521134S000BE - KIT EVAL STARTER FOR R8C/13R0E521174CPE10 - EMULATOR COMPACT R8C/18/19/1
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/18 Group, R8C/19 Group
Rev.1.30
REJ09B0222-0130
Figure 17.11
NOTES:
Jump to the on-chip oscillator mode (main clock stops)
program which has been transferred to an area other
than the flash memory.
(The subsequent processing is executed by the program
in an area other than the flash memory.)
Transfer an on-chip oscillator mode (main clock stops)
program to an area other then the flash memory.
1. Set the FMR01 bit to 1 (CPU rewrite mode) before setting the FMSTP bit to 1 .
2. Before switching to a different clock source for the CPU, make sure the designated clock is stable.
3. Insert a 30 µ s wait time in a program. Do not access the flash memory during this wait time.
Apr 14, 2006
Stops)
Process to Reduce Power Consumption in On-Chip Oscillator Mode (Main Clock
Page 187 of 233
On-chip oscillator mode
(main clock stops) program
Jump to a specified address in the flash memory
Turn main clock on → wait until oscillation
stabilizes → switch the clock source for CPU
clock
Switch the clock source for the CPU clock.
Turn XIN off.
Wait until the flash memory circuit stabilizes
(30 µ s)
Write 1 to the FMSTP bit (flash memory stops.
Process in on-chip oscillator mode (main
clock stops)
Write 0 to the FMR01 bit before writing 1
(2)
(3)
low power consumption mode)
(CPU rewrite mode enabled)
(CPU rewrite mode disabled)
(flash memory operation)
Write 0 to the FMR01 bit
Write 0 to the FMSTP bit
17. Flash Memory Version
(1)