R5F21191SP#U0 Renesas Electronics America, R5F21191SP#U0 Datasheet - Page 80

• 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
10.4
10.4.1
Table 10.2
NOTE:
High-speed mode
Medium-
speed
mode
High-speed,
low-speed
on-chip
oscillator
mode
There are three power control modes. All modes other than wait mode and stop mode are referred to as
standard operating mode.
1. The low-speed on-chip oscillator is used as the on-chip oscillator clock when the CM14 bit in the
Standard operating mode is further separated into four modes.
In standard operating mode, the CPU clock and the peripheral function clock are supplied to operate
the CPU and the peripheral function clocks. Power consumption control is enabled by controlling the
CPU clock frequency. The higher the CPU clock frequency, the more processing power increases.
The lower the CPU clock frequency, the more power consumption decreases. When unnecessary
oscillator circuits stop, power consumption is further reduced.
Before the clock sources for the CPU clock can be switched over, the new clock source needs to be
oscillating and stable. If the new clock source is the main clock, allow sufficient wait time in a
program until oscillation is stabilized before exiting.
(1)
CM1 register is set to 0 (low-speed on-chip oscillator on) and the HRA01 bit in the HRA0 register is
set to 0. The high-speed on-chip oscillator is used as the on-chip oscillator clock when the HRA00
bit in the HRA0 register is set to 1 (high-speed on-chip oscillator A on) and the HRA01 bit in the
HRA0 register is set to 1.
Power Control
Apr 14, 2006
Standard Operating Mode
Modes
Settings and Modes of Clock Associated Bits
Divide-by-2
Divide-by-4
Divide-by-8
Divide-by-16
No division
Divide-by-2
Divide-by-4
Divide-by-8
Divide-by-16
Page 63 of 233
OCD Register
OCD2
0
0
0
0
0
1
1
1
1
1
CM17, CM16
00b
01b
10b
11b
00b
01b
10b
11b
−
−
CM1
Register
CM13
1
1
1
1
1
−
−
−
−
−
CM06
10. Clock Generation Circuit
0
0
0
1
0
0
0
0
1
0
CM0
Register
CM05
0
0
0
0
0
−
−
−
−
−