R5F21294SNSP#U0 Renesas Electronics America, R5F21294SNSP#U0 Datasheet - Page 45

MCU 3/5V 16K+2K 20PIN-SSOP

R5F21294SNSP#U0

Manufacturer Part Number
R5F21294SNSP#U0
Description
MCU 3/5V 16K+2K 20PIN-SSOP
Manufacturer
Renesas Electronics America
Series
M16C™ M16C/R8C/Tiny/29r
Datasheet

Specifications of R5F21294SNSP#U0

Core Processor
R8C
Core Size
16-Bit
Speed
20MHz
Connectivity
I²C, LIN, SIO, SSU, UART/USART
Peripherals
LED, POR, Voltage Detect, WDT
Number Of I /o
13
Program Memory Size
16KB (16K x 8)
Program Memory Type
FLASH
Ram Size
1K x 8
Voltage - Supply (vcc/vdd)
2.2 V ~ 5.5 V
Data Converters
A/D 4x10b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 85°C
Package / Case
20-SSOP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
R5F21294SNSP#U0R5F21294SNSP#UO
Manufacturer:
RENESAS
Quantity:
15 449
R8C/28 Group, R8C/29 Group
Rev.2.10
REJ09B0279-0210
5.1
5.1.1
5.1.2
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”). 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 divided by 8 is automatically selected as the CPU clock.
Refer to 4. Special Function Registers (SFRs) for the state 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 5.6 shows an Example of Hardware Reset Circuit and Operation and Figure 5.7 shows an Example of
Hardware Reset Circuit (Usage Example of External Supply Voltage Detection Circuit) and Operation.
Hardware Reset
(1) Apply “L” to the RESET pin.
(2) Wait for 10 µs or more.
(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 20. Electrical
(4) Wait for 10 µs or more.
(5) Apply “H” to the RESET pin.
Sep 26, 2008
When Power Supply is Stable
Power On
Characteristics).
Page 26 of 441
5. Resets

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