R5F21324CNSP#U0 Renesas Electronics America, R5F21324CNSP#U0 Datasheet - Page 121

• Manufacturer Part Number: R5F21324CNSP#U0
• Description: MCU 1KB FLASH 16K ROM 20-LSSOP
• Manufacturer: Renesas Electronics America
• Series: R8C/3x/32Cr

Specifications of R5F21324CNSP#U0

• Core Processor: R8C
• Core Size: 16/32-Bit
• Speed: 20MHz
• Connectivity: I²C, LIN, SIO, SSU, UART/USART
• Peripherals: POR, PWM, Voltage Detect, WDT
• Number Of I /o: 15
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Ram Size: 1.5K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 20-LSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/32C Group
REJ09B0573-0100 Rev.1.00 Dec. 18, 2009
Page 92 of 573
9.2.2
Notes:
After Reset
1. When the CM06 bit is set to 0 (bits CM16 and CM17 enabled), bits CM16 and CM17 are enabled.
2. If the CM10 bit is set to 1 (stop mode), the on-chip feedback resistor is disabled.
3. When the OCD2 bit is set to 0 (XIN clock selected), the CM14 bit can be set to 1 (low-speed on-chip oscillator
4. To use the voltage monitor 1 interrupt or voltage monitor 2 interrupt (when the digital filter is used), set the CM14
5. Once the CM13 bit is set to 1 by a program, it cannot be set to 0.
6. Do not set the CM10 bit to 1 (stop mode) when the VCA20 bit in the VCA2 register to 1 (low consumption
Bit
b0
b1
b2
b3
b4
b5
b6
b7
Address 0007h
off). When the OCD2 bit is set to 1 (on-chip oscillator clock selected), the CM14 bit is set to 0 (low-speed on-chip
oscillator on). It remains unchanged even if 1 is written to it.
bit to 0 (low-speed on-chip oscillator on).
enabled).
Set the PRC0 bit in the PRCR register to 1 (write enabled) before rewriting the CM1 register.
Symbol
Symbol
Bit
CM10
CM11
CM12
CM13
CM14
CM16
CM17
System Clock Control Register 1 (CM1)
—
CM17
b7
0
All clock stop control bit
XIN-XOUT on-chip feedback resistor
select bit
XCIN-XCOUT on-chip feedback
resistor select bit
Port/XIN-XOUT switch bit
Low-speed on-chip oscillator stop bit
(3, 4)
Reserved bit
CPU clock division select bit 1
CM16
b6
0
Bit Name
b5
—
1
(2, 6)
(5)
CM14
b4
(1)
0
0: Clock oscillates
1: All clocks stop (stop mode)
0: On-chip feedback resistor enabled
1: On-chip feedback resistor disabled
0: On-chip feedback resistor enabled
1: On-chip feedback resistor disabled
0: I/O ports P4_6 and P4_7
1: XIN-XOUT pin
0: Low-speed on-chip oscillator on
1: Low-speed on-chip oscillator off
Set to 1.
b7 b6
0 0: No division mode
0 1: Divide-by-2 mode
1 0: Divide-by-4 mode
1 1: Divide-by-16 mode
CM13
b3
0
CM12
b2
0
Function
CM11
b1
0
9. Clock Generation Circuit
CM10
b0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W