R5F21102DFP#U0 Renesas Electronics America, R5F21102DFP#U0 Datasheet - Page 185

• Manufacturer Part Number: R5F21102DFP#U0
• Description: IC R8C MCU FLASH 8K 32LQFP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M16C/R8C/Tiny/10r

Specifications of R5F21102DFP#U0

• Core Processor: R8C
• Core Size: 16-Bit
• Speed: 16MHz
• Connectivity: SIO, UART/USART
• Peripherals: LED, WDT
• Number Of I /o: 22
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-LQFP
• For Use With: R0K521134S000BE - KIT EVAL STARTER FOR R8C/13R0E521134EPB00 - KIT EMULATOR PROBE FOR PC7501R0E521134CPE00 - EMULATOR COMPACT R8C/13
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/10 Group
Rev.1.20 Jan 27, 2006
REJ09B0019-0120
19.8 Noise
(1) Bypass Capacitor between V
(2) Port Control Registers Data Read Error
(3) CNVss Pin Wiring
Insert a bypass capacitor (at least 0.1 µF) between V
noise and latch-up. The connecting wires must be the shortest and widest possible.
During severe noise testing, mainly power supply system noise, and introduction of external noise, the
data of port related registers may changed. As a firmware countermeasure, it is recommended to
periodically reset the port registers, port direction registers and pull-up control registers. However, you
should fully examine before introducing the reset routine as conflicts may be created between this
reset routine and interrupt routines (i. e. ports are switched during interrupts).
In order to improve the pin tolerance to noise, insert a pull down resistance (about 5 k ) between
CNVss and Vss, and placed as close as possible to the CNVss pin.
page 173 of 180
CC
and V
SS
Pins
CC
and V
SS
pins as the countermeasures against
19. Usage Notes