M30626FJPFP#U5C Renesas Electronics America, M30626FJPFP#U5C Datasheet - Page 119

• Manufacturer Part Number: M30626FJPFP#U5C
• Description: IC M16C MCU FLASH 512K 100QFP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M16C/60r

Specifications of M30626FJPFP#U5C

• Core Processor: M16C/60
• Core Size: 16-Bit
• Speed: 24MHz
• Connectivity: I²C, IEBus, UART/USART
• Peripherals: DMA, WDT
• Number Of I /o: 85
• Program Memory Size: 512KB (512K x 8)
• Program Memory Type: FLASH
• Ram Size: 31K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 26x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 100-QFP
• For Use With: 867-1000 - KIT QUICK START RENESAS 62PR0K33062PS001BE - R0K33062P STARTER KITR0K33062PS000BE - KIT EVAL STARTER FOR M16C/62PM3062PT3-CPE-3 - EMULATOR COMPACT M16C/62P/30P
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

M16C/62P Group (M16C/62P, M16C/62PT)
Rev.2.41
REJ09B0185-0241
10.5
The system clock protection function prohibits the CPU clock from changing clock sources when the main clock is
selected the CPU clock source. This prevents the CPU clock from stopping should the program crash. This
function is available when the main clock is selected as the CPU clock source.
When the PM21 bit in the PM2 register is set to “1” (clock change disabled), the following bits cannot be written
to:
When using the system clock protection function, set the CM05 bit in the CM0 register to “0” (main clock
oscillation) and CM07 bit to “0” (main clock as CPU clock source) and follow the procedure below.
When the PM21 bit is set to “1,” do not execute the WAIT instruction.
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•
•
•
(1) Set the PRC1 bit in the PRCR register to “1” (write enable).
(2) Set the PM21 bit in the PM2 register to “1” (protects the clock).
(3) Set the PRC1 bit in the PRCR register to “0” (write disable).
The CM02 bit, CM05 bit and CM07 bit in the CM0 register
The CM10 bit and CM11 bit in the CM1 register
The CM20 bit in the CM2 register
All bits in the PLC0 register
System Clock Protection Function
Jan 10, 2006
Page 102 of 390
10. Clock Generation Circuit