R5F21334CNFP#U0 Renesas Electronics America, R5F21334CNFP#U0 Datasheet - Page 64
R5F21334CNFP#U0
Manufacturer Part Number
R5F21334CNFP#U0
Description
MCU 1KB FLASH 16K ROM 32-LQFP
Manufacturer
Renesas Electronics America
Series
R8C/3x/33Cr
Datasheet
1.R5F21331CNFPU0.pdf
(622 pages)
Specifications of R5F21334CNFP#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
27
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 12x10b; D/A 2x8b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 85°C
Package / Case
32-LQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
R5F21334CNFP#U0R5F21334CNFP#V2
Manufacturer:
Renesas Electronics America
Quantity:
10 000
- Current page: 64 of 622
- Download datasheet (7Mb)
R8C/33C Group
REJ09B0570-0100 Rev.1.00 Dec. 14, 2009
Page 34 of 589
5.4
Figure 5.7
A reset is applied using the on-chip voltage detection 0 circuit. The voltage detection 0 circuit monitors the input
voltage to the VCC pin. The voltage to monitor is Vdet0. To use voltage monitor 0 reset, set the LVDAS bit in the
OFS register to 0 (voltage monitor 0 reset enabled after reset). The Vdet0 voltage detection level can be changed by
the settings of bits VDSEL0 to VDSEL1 in the OFS register.
When the input voltage to the VCC pin reaches the Vdet0 level or below, the pins, CPU, and SFR are reset.
When the input voltage to the VCC pin reaches the Vdet0 level or above, the low-speed on-chip oscillator clock
start counting. When the low-speed on-chip oscillator clock count reaches 32, the internal reset signal is held “H”
and the MCU enters the reset sequence (refer to Figure 5.3). The low-speed on-chip oscillator clock with no
division is automatically selected as the CPU clock after reset.
To use the power-on reset function, enable voltage monitor 0 reset by setting the LVDAS bit in the OFS register to
0.
Bits VDSEL0 to VDSEL1 and LVDAS cannot be changed by a program. To set these bits, write values to b4 to b6
of address 0FFFFh using a flash programmer.
Refer to 5.1.3 Option Function Select Register (OFS) for details of the OFS register.
Refer to 4. Special Function Registers (SFRs) for the status of the SFR after voltage monitor 0 reset.
The internal RAM is not reset. When the input voltage to the VCC pin reaches the Vdet0 level or below while
writing to the internal RAM is in progress, the contents of internal RAM are undefined.
Refer to 6. Voltage Detection Circuit for details of voltage monitor 0 reset.
Figure 5.7 shows an Example of Voltage Monitor 0 Reset Circuit and Operation.
Notes:
Voltage Monitor 0 Reset
1. Vdet0 indicates the voltage detection level of the voltage detection 0 circuit. Refer to 6. Voltage
2. To use the power-on reset function, enable voltage monitor 0 reset by setting the LVDAS bit in
Detection Circuit for details.
the OFS register to 0.
Example of Voltage Monitor 0 Reset Circuit and Operation
Internal reset signal
Power V
External
0.5 V
V
det0
CC
circuit response time
Voltage detection 0
f
OCO-S
1
× 32
5. Resets
Related parts for R5F21334CNFP#U0
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
KIT STARTER FOR M16C/29
Manufacturer:
Renesas Electronics America
Datasheet:
Part Number:
Description:
KIT STARTER FOR R8C/2D
Manufacturer:
Renesas Electronics America
Datasheet:
Part Number:
Description:
R0K33062P STARTER KIT
Manufacturer:
Renesas Electronics America
Datasheet:
Part Number:
Description:
KIT STARTER FOR R8C/23 E8A
Manufacturer:
Renesas Electronics America
Datasheet:
Part Number:
Description:
KIT STARTER FOR R8C/25
Manufacturer:
Renesas Electronics America
Datasheet:
Part Number:
Description:
KIT STARTER H8S2456 SHARPE DSPLY
Manufacturer:
Renesas Electronics America
Datasheet:
Part Number:
Description:
KIT STARTER FOR R8C38C
Manufacturer:
Renesas Electronics America
Datasheet:
Part Number:
Description:
KIT STARTER FOR R8C35C
Manufacturer:
Renesas Electronics America
Datasheet:
Part Number:
Description:
KIT STARTER FOR R8CL3AC+LCD APPS
Manufacturer:
Renesas Electronics America
Datasheet:
Part Number:
Description:
KIT STARTER FOR RX610
Manufacturer:
Renesas Electronics America
Datasheet:
Part Number:
Description:
KIT STARTER FOR R32C/118
Manufacturer:
Renesas Electronics America
Datasheet:
Part Number:
Description:
KIT DEV RSK-R8C/26-29
Manufacturer:
Renesas Electronics America
Datasheet:
Part Number:
Description:
KIT STARTER FOR SH7124
Manufacturer:
Renesas Electronics America
Datasheet:
Part Number:
Description:
KIT STARTER FOR H8SX/1622
Manufacturer:
Renesas Electronics America
Datasheet:
Part Number:
Description:
KIT DEV FOR SH7203
Manufacturer:
Renesas Electronics America
Datasheet: