R5F21191SP#U0 Renesas Electronics America, R5F21191SP#U0 Datasheet - Page 76

• 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
Figure 10.6
High-Speed On-Chip Oscillator Control Register 1
High-Speed On-Chip Oscillator Control Register 2
b7 b6 b5 b4 b3 b2 b1 b0
NOTE:
b7 b6 b5 b4
NOTES:
1.
1.
2.
3.
4.
Set the PRC0 bit in the PRCR register to 1 (w rite enable) before rew riting the HRA1 register.
Set the PRC0 bit in the PRCR register to 1 (w rite enable) before rew riting the HRA2 register.
High-speed on-chip oscillator frequency = 8 MHz (HRA1 register = value w hen shipping)
If fRING-fast mode 0 is sw itched to fRING-fast mode 1, the frequency is multiplied by 1.5.
If fRING-fast mode 0 is sw itched to fRING-fast mode 2, the frequency is multiplied by 0.5.
Apr 14, 2006
0
b3 b2 b1 b0
0 0
Registers HRA1 and HRA2
The frequency of the high-speed on-chip oscillator is adjusted w ith bits 0 to 7.
High-speed on-chip oscillator frequency = 8 MHz
(HRA1 register = value w hen shipping ; fRING-fast mode 0)
Setting the HRA1 register to a low er value (minimum value: 00h), results in a higher
frequency.
Setting the HRA1 register to a higher value (maximum value: FFh), results in a low er
frequency.
Bit Symbol
(b4-b2)
(b7-b5)
Symbol
Symbol
HRA20
HRA21
HRA1
HRA2
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High-speed on-chip oscillator mode
select bits
Reserved bits
Nothing is assigned. If necessary, set to 0.
When read, the content is 0.
Address
Address
Bit Name
0021h
0022h
(1)
(1)
Function
b1 b0
0 0 : fRING-fast mode 0
0 1 : fRING-fast mode 1
1 0 : fRING-fast mode 2
1 1 : Do not set.
Set to 0.
When Shipping
After Reset
After Reset
Function
00h
10. Clock Generation Circuit
(2)
(3)
(4)
RW
RW
RW
RW
RW
RW
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