R5F21346CNFP#U0 Renesas Electronics America, R5F21346CNFP#U0 Datasheet - Page 65

MCU 1KB FLASH 32K ROM 48-LQFP

R5F21346CNFP#U0

Manufacturer Part Number
R5F21346CNFP#U0
Description
MCU 1KB FLASH 32K ROM 48-LQFP
Manufacturer
Renesas Electronics America
Series
R8C/3x/34Cr
Datasheet

Specifications of R5F21346CNFP#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
43
Program Memory Size
32KB (32K x 8)
Program Memory Type
FLASH
Ram Size
2.5K 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
48-LQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-

Available stocks

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Price
Company:
Part Number:
R5F21346CNFP#U0
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Part Number:
R5F21346CNFP#U0
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R8C/34C Group
REJ09B0586-0100 Rev.1.00 Jan 13, 2010
Page 32 of 723
5.2
5.2.1
5.2.2
A reset is applied using the RESET pin. When an “L” signal is applied to the RESET pin while the supply voltage
meets the recommended operating conditions, pins, CPU, and SFRs are all reset (refer to Table 5.2 Pin Functions
while RESET Pin Level is “L”, Figure 5.2 CPU Register Status after Reset, and Table 4.1 to Table 4.12 SFR
Information).
When the input level applied to the RESET pin changes from “L” to “H”, a program is executed beginning with the
address indicated by the reset vector. After reset, the low-speed on-chip oscillator clock with no division is
automatically selected as the CPU clock.
Refer to 4. Special Function Registers (SFRs) for the states of the SFRs after reset.
The internal RAM is not reset. If the RESET pin is pulled “L” while writing to the internal RAM is in progress, the
contents of internal RAM will be undefined.
Figure 5.4 shows an Example of Hardware Reset Circuit and Operation and Figure 5.5 shows an Example of
Hardware Reset Circuit (Usage Example of External Supply Voltage Detection Circuit) and Operation.
(1) Apply “L” to the RESET pin.
(2) Wait for 10 µs.
(3) Apply “H” to the RESET pin.
(1) Apply “L” to the RESET pin.
(2) Let the supply voltage increase until it meets the recommended operating conditions.
(3) Wait for td(P-R) or more to allow the internal power supply to stabilize (refer to 33. Electrical
(4) Wait for 10 µs.
(5) Apply “H” to the RESET pin.
Hardware Reset
Characteristics).
When Power Supply is Stable
Power On
5. Resets

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