R5F211B1SP#U0 Renesas Electronics America, R5F211B1SP#U0 Datasheet - Page 81

• 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
Figure 10.5
High-Speed On-Chip Oscillator Control Register 0
b7 b6 b5 b4
NOTES :
0 0 0 0
1. Set the PRC0 bit in the PRCR register to 1 (w rite enable) before rew riting the HRA0 register.
2.
3.
Change the HRA01 bit under the follow ing conditions.
• HRA00 = 1 (high-speed on-chip oscillation)
• The CM14 bit in the CM1 register = 0 (low -speed on-chip oscillator on)
When setting the HRA01 bit to 0 (low -speed on-chip oscillator selected), do not set the HRA00 bit to 0 (high-speed
on-chip oscillator off) at the same time.
Set the HRA00 bit to 0 after setting the HRA01 bit to 0.
Dec 08, 2006
b3 b2 b1 b0
0 0
HRA0 Register
Bit Symbol
(b7-b2)
Symbol
HRA00
HRA01
HRA0
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—
High-speed on-chip oscillator enable
bit
High-speed on-chip oscillator select
bit
Reserved bits
(2)
Address
Bit Name
0020h
(1)
0 : High-speed on-chip oscillator off
1 : High-speed on-chip oscillator on
0 : Selects low -speed on-chip oscillator.
1 : Selects high-speed on-chip oscillator.
Set to 0.
After Reset
Function
00h
10. Clock Generation Circuit
(3)
RW
RW
RW
RW