R5F21324CNSP#U0 Renesas Electronics America, R5F21324CNSP#U0 Datasheet - Page 305

MCU 1KB FLASH 16K ROM 20-LSSOP

R5F21324CNSP#U0

Manufacturer Part Number
R5F21324CNSP#U0
Description
MCU 1KB FLASH 16K ROM 20-LSSOP
Manufacturer
Renesas Electronics America
Series
R8C/3x/32Cr
Datasheet

Specifications of R5F21324CNSP#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
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
-
R8C/32C Group
REJ09B0573-0100 Rev.1.00 Dec. 18, 2009
Page 276 of 573
20.2
Figure 20.1
In real-time clock mode, a 1-second signal is generated from fC4 using a divide-by-2 frequency divider, 4-bit
counter, and 8-bit counter and used to count seconds, minutes, hours, and days of the week. Figure 20.1 shows
a Block Diagram of Real-Time Clock Mode and Table 20.1 lists the Real-Time Clock Mode Specifications.
Table 20.2 lists the Interrupt Sources, Figure 20.2 shows the Definition of Time Representation and Figure 20.3
shows the Operating Example in Real-Time Clock Mode.
Real-Time Clock Mode
(8.192kHz)
Block Diagram of Real-Time Clock Mode
fC4
H12_H24, PM, INT: Bits in TRECR1 register
SEIE, MNIE, HRIE, DYIE, WKIE: Bits in TRECR2 register
BSY: Bit in TRESEC, TREMIN, TREHR, TREWK register
BSY
bit
TRESEC
register
1/2
MNIE
SEIE
Overflow
TREMIN
4-bit counter
register
(1/16)
HRIE
Overflow
H12_H24
bit
Data bus
TREHR
register
8-bit counter
(1/256)
PM
DYIE
bit
Overflow
WKIE
TREWK
register
(1s) Overflow
000
Timing
control
INT
bit
Timer RE
interrupt
20. Timer RE

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