R5F21324ANSP#U1 Renesas Electronics America, R5F21324ANSP#U1 Datasheet - Page 61
R5F21324ANSP#U1
Manufacturer Part Number
R5F21324ANSP#U1
Description
MCU 1KB FLASH 16K ROM 20-LSSOP
Manufacturer
Renesas Electronics America
Series
R8C/3x/32Ar
Datasheet
1.R5F21322ANSPU1.pdf
(629 pages)
Specifications of R5F21324ANSP#U1
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
-
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Under development
R8C/32A Group
REJ09B0458-0020 Rev.0.20
Page 31 of 583
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”). 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 32. Electrical
(4) Wait for 10 µs.
(5) Apply “H” to the RESET pin.
Hardware Reset
Characteristics).
When Power Supply is Stable
Power On
Preliminary specification
Specifications in this manual are tentative and subject to change.
Nov 05, 2008
5. Resets
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