R5F21236KFP#U0 Renesas Electronics America, R5F21236KFP#U0 Datasheet - Page 95

• Manufacturer Part Number: R5F21236KFP#U0
• Description: IC R8C/23 MCU FLASH 48LQFP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M16C/R8C/Tiny/23r

Specifications of R5F21236KFP#U0

• Core Processor: R8C
• Core Size: 16-Bit
• Speed: 16MHz
• Connectivity: CAN, I²C, LIN, SIO, SSU, UART/USART
• Peripherals: POR, Voltage Detect, WDT
• Number Of I /o: 41
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 12x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 48-LQFP
• For Use With: RCDK8C - KIT DEV EVAL FOR CAN R8C/23R0E521237CPE00 - EMULATOR COMPACT R8C/20/21/22/23
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/22 Group, R8C/23 Group
Rev.2.00 Aug 20, 2008
REJ09B0251-0200
Figure 10.2
System Clock Control Register 0
b7 b6 b5 b4 b3 b2 b1 b0
NOTES:
0
1.
2.
3.
4.
5.
Set the PRC0 bit in the PRCR register to 1 (enables w riting) before rew riting to the CM0 register.
The CM05 bit is to stop the XIN clock w hen the high-speed on-chip oscillator mode, low -speed on-chip oscillator
mode is selected. Do not use this bit for w hether the XIN clock is stopped. To stop the XIN clock, set the bits in the
follow ing orders:
(a) Set the OCD0 and OCD1 bits in the OCD register to 00b.
(b) Set the OCD2 bit to 1 (selects on-chip oscillator clock).
During external clock input, only the clock oscillation buffer is turned off and clock input is acknow ledged.
P4_6 and P4_7 can be used as input ports w hen the CM05 bit is set to 1 (XIN clock stops) and the CM13 bit in the
CM1 register is set to 0 (P4_6, P4_7).
When entering stop mode, the CM06 bit is set to 1 (divide-by-8 mode).
0 1
CM0 Register
0 0
Bit Symbol
(b1-b0)
Symbol
CM02
CM05
CM06
Page 73 of 501
CM0
(b3)
(b4)
(b7)
—
—
—
—
Reserved bits
WAIT peripheral function clock stop
bit
Reserved bit
Reserved bit
XIN 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 w ait
Set to 1
Set to 0
0 : XIN clock oscillates
1 : XIN clock stops
0 : Enables CM16, CM17
1 : Divide-by-8 mode
Set to 0
in w ait mode
mode
After Reset
01101000b
Function
(3)
10. Clock Generation Circuit
RW
RW
RW
RW
RW
RW
RW
RW