R5F21334CNFP#U0 Renesas Electronics America, R5F21334CNFP#U0 Datasheet - Page 198

MCU 1KB FLASH 16K ROM 32-LQFP

R5F21334CNFP#U0

Manufacturer Part Number
R5F21334CNFP#U0
Description
MCU 1KB FLASH 16K ROM 32-LQFP
Manufacturer
Renesas Electronics America
Series
R8C/3x/33Cr
Datasheet

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
-

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R8C/33C Group
REJ09B0570-0100 Rev.1.00 Dec. 14, 2009
Page 168 of 589
Figure 14.1
Bits WDTRCS0 and WDTRCS1
Oscillation starts
when CSPRO = 1
CPU clock
Internal reset signal
Write to WDTR register
Note:
1. A value set by bits WDTUFS0 and WDTUFS1 is set in the watchdog timer (value when shipping: 3FFFh).
(“L” active)
Watchdog Timer Block Diagram
Low-speed on-chip oscillator
for watchdog timer
Prescaler
1/128
1/16
1/2
Refresh period
CM07 = 0,
WDTC7 = 1
control circuit
CM07 = 1
CM07 = 0,
WDTC7 = 0
CSPRO = 0
CSPRO: Bit in CSPR register
WDTC7: Bit in WDTC register
PM12: Bit in PM1 register
CM07: Bit in CM0 register
WDTUFS0, WDTUFS1, WDTRCS0, WDTRCS1: Bits in OFS2 register
CSPRO = 1
Watchdog timer
(Note 1)
14. Watchdog Timer
PM12 = 1
PM12 = 0
Watchdog
timer reset
Watchdog timer
interrupt request

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