R5F211B1SP#U0 Renesas Electronics America, R5F211B1SP#U0 Datasheet - Page 86

• Manufacturer Part Number: R5F211B1SP#U0
• Description: IC R8C MCU FLASH 4K 20SSOP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M16C/R8C/Tiny/1Br

Specifications of R5F211B1SP#U0

• Core Processor: R8C
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: I²C, SIO, SSU, 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 4x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 20-SSOP
• For Use With: R0K5211B4S001BE - KIT STARTER FOR R8C/18191A1BR0K5211B4S000BE - KIT DEV EVALUATION R8C/1BR0E521174CPE10 - EMULATOR COMPACT R8C/18/19/1
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/1A Group, R8C/1B Group
Rev.1.30
REJ09B0252-0130
10.4
10.4.1
Table 10.2
NOTE:
High-speed mode
Medium-
speed mode
High-speed
and low-speed
on-chip
oscillator
modes
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.
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.
(1)
Power Control
Dec 08, 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 68 of 315
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
−
−
−
−
−
10. Clock Generation Circuit
CM06
0
0
0
1
0
0
0
0
1
0
CM0
Register
CM05
0
0
0
0
0
−
−
−
−
−