R5F21191SP#U0 Renesas Electronics America, R5F21191SP#U0 Datasheet - Page 72

• 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 10.2
System Clock Control Register 0
b7 b6 b5 b4
NOTES:
0
1.
2.
3.
4.
5. When entering stop mode from high or medium speed mode, the CM06 bit is set to 1 (divide-by-8 mode).
Set the PRC0 bit in the PRCR register to 1 (w rite enable) before rew riting the CM0 register.
The CM05 bit stops the main clock w hen the on-chip oscillator mode is selected.
Do not use this bit to detect w hether the main clock is stopped. To stop the main clock, set the bits in the follow ing
order:
(a) Set bits OCD1 and OCD0 in the OCD register to 00b (oscillation stop detection function disabled).
(b) Set the OCD2 bit to 1 (selects on-chip oscillator clock).
To input an external clock, set the CM05 bit to 1 (main clock stops) and the CM13 bit in the CM1 register to 1
(XIN-XOUT pin).
When the CM05 bit is set to 1 (main clock stops), P4_6 and P4_7 can be used as input ports.
Apr 14, 2006
0
b3 b2 b1 b0
1
CM0 Register
0 0
Bit Symbol
(b1-b0)
Symbol
CM02
CM05
CM06
CM0
(b3)
(b4)
(b7)
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—
—
—
—
Reserved bits
WAIT peripheral function clock stop
bit
Reserved bit
Reserved bit
Main clock (XIN-XOUT) stop bit
System clock division select bit 0
Reserved bit
(1)
Address
Bit Name
0006h
(2, 4)
(5)
Set to 0.
0 : Peripheral function clock does not stop
1 : Peripheral function clock stops in
Set to 1.
Set to 0.
0 : Main clock oscillates.
1 : Main clock stops.
0 : CM16, CM17 enabled
1 : Divide-by-8 mode
Set to 0.
in w ait mode.
w ait mode.
After Reset
Function
68h
(3)
10. Clock Generation Circuit
RW
RW
RW
RW
RW
RW
RW
RW