R5F21324CNSP#U0 Renesas Electronics America, R5F21324CNSP#U0 Datasheet - Page 57

• 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 28 of 573
5.1
5.1.1
5.1.2
Notes:
After Reset
After Reset
1. The CWR bit is set to 0 (cold start-up) after power-on or voltage monitor 0 reset. This bit remains unchanged at a
2. If 1 is written to the CWR bit by a program, it is set to 1. (Writing 0 does not affect this bit.)
3. When the VW0C0 bit in the VW0C register is set to 0 (voltage monitor 0 reset disabled), the CWR bit value is
Bit
b0
b1
b2
b3
b4
b5
b6
b7
Bit
b0
b1
b2
b3
b4
b5
b6
b7
Address 0004h
Address 000Bh
Set the PRC1 bit in the PRCR register to 1 (write enabled) before rewriting the PM0 register.
hardware reset, software reset, or watchdog timer reset.
undefined.
Symbol
Symbol
Registers
Symbol
Symbol
Bit
Bit
PM03
CWR
HWR
SWR
WDR
Processor Mode Register 0 (PM0)
Reset Source Determination Register (RSTFR)
—
—
—
—
—
—
—
—
—
—
—
b7
b7
—
—
0
0
Reserved bits
Software reset bit
Nothing is assigned. If necessary, set to 0. When read, the content is 0.
Cold start-up/warm start-up
determine flag
Hardware reset detect flag
Software reset detect flag
Watchdog timer reset detect flag
Reserved bits
Reserved bit
b6
b6
—
—
X
0
Bit Name
Bit Name
(2, 3)
b5
—
b5
—
X
0
b4
b4
—
—
X
0
0: Cold start-up
1: Warm start-up
0: Not detected
1: Detected
0: Not detected
1: Detected
0: Not detected
1: Detected
When read, the content is undefined.
Set to 0.
Set to 0.
The MCU is reset when this bit is set to 1. When
read, the content is 0.
PM03
WDR
b3
b3
0
X
SWR
b2
b2
—
X
0
Function
Function
HWR
b1
b1
—
X
0
CWR
b0
b0
—
X
0
(Note 1)
5. Resets
R/W
R/W
R/W
R/W
R/W
R/W
—
R
R
R
R