R5F21132FP#U0 Renesas Electronics America, R5F21132FP#U0 Datasheet - Page 50

• Manufacturer Part Number: R5F21132FP#U0
• Description: IC R8C MCU FLASH 8K 32LQFP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M16C/R8C/Tiny/13r

Specifications of R5F21132FP#U0

• Core Processor: R8C
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: SIO, UART/USART
• Peripherals: LED, POR, Voltage Detect, 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 12x10b
• Oscillator Type: Internal
• Operating Temperature: -20°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/13 Group
Rev.1.20
REJ09B0111-0120
6.4 Power Control
There are three power control modes. All modes other than wait and stop modes are referred to as
normal operation mode.
6.4.1 Normal Operation Mode
Normal operation mode is further classified into four modes.
In normal operation mode, because the CPU clock and the peripheral function clocks both are on, the
CPU and the peripheral functions are operating. Power control is exercised by controlling the CPU
clock frequency. The higher the CPU clock frequency, the greater the processing capability. The lower
the CPU clock frequency, the smaller the power consumption in the chip. If the unnecessary oscillator
circuits are turned off, the power consumption is further reduced.
Before the clock sources for the CPU clock can be switched over, the new clock source to which
switched must be oscillating stably. If the new clock source is the main clock, allow a sufficient wait
time in a program until it becomes oscillating stably.
• High-speed Mode
• Medium-speed Mode
• High-speed, Low-speed, On-Chip Oscillator Mode
Jan 27, 2006
The main clock divided by 1 (undivided) provides the CPU clock. If the CM14 bit is set to “0” (low-
speed on-chip oscillator on) or the HR00 bit in the HR0 register is set to “1” (high-speed on-chip
oscillator on), the f
f
The main clock divided by 2, 4, 8 or 16 provides the CPU clock. If the CM14 bit is set to “0” (low-
speed on-chip oscillator on) or the HR00 bit in the HR0 register is set to “1” (high-speed on-chip
oscillator on), the f
f
The on-chip oscillator clock divided by 1 (undivided), 2, 4, 8 or 16 provides the CPU clock. The on-
chip oscillator clock is also the clock source for the peripheral function clocks. When the HR00 bit is
set to “1”, f
RING-
RING-
fast can be used for timer C.
fast can be used for timer C.
RING-
page 37 of 205
fast can be used for timer C.
RING
RING
and f
and f
RING128
RING128
can be used for timers Y and C. When the HR00 bit is set to “1”,
can be used for timers Y and C. When the HR00 bit is set to “1”,
6.4 Power Control