R5F21274SDFP#U0 Renesas Electronics America, R5F21274SDFP#U0 Datasheet - Page 243

• Manufacturer Part Number: R5F21274SDFP#U0
• Description: IC R8C/27 MCU FLASH 32LQFP
• Manufacturer: Renesas Electronics America
• Series: R8C/2x/27r

Specifications of R5F21274SDFP#U0

• Core Processor: R8C
• Core Size: 16/32-Bit
• Speed: 20MHz
• Connectivity: I²C, LIN, SIO, SSU, UART/USART
• Peripherals: LED, POR, Voltage Detect, WDT
• Number Of I /o: 25
• 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 12x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-LQFP
• For Use With: R0K521276S000BE - KIT DEV RSK-R8C/26-29R0E521000EPB00 - PROBE EMULATOR FOR PC7501
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/26 Group, R8C/27 Group
Rev.2.10
REJ09B0278-0210
Figure 14.61
14.4.1
H12_H24, PM, INT: Bits in TRECR1 register
BSY: Bit in registers TRESEC, TREMIN, TREHR, and TREWK
fC4
BSY
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 14.61 shows
a Block Diagram of Real-Time Clock Mode and Table 14.25 lists the Specifications of Real-Time Clock Mode.
Figures 14.62 to 14.66 and 14.68 and 14.69 show the registers associated with real-time clock mode. Table
14.26 lists the Interrupt Sources, Figure 14.67 shows the Definition of Time Representation, and Figure 14.70
shows the Operating Example in Real-Time Clock Mode.
bit
TRESEC
register
Sep 26, 2008
Real-Time Clock Mode (For N, D Version Only)
MNIE
SEIE
Overflow
Block Diagram of Real-Time Clock Mode
1/2
TREMIN
register
Page 224 of 453
HRIE
4-bit counter
Overflow
(1/16)
H12_H24
bit
Data bus
TREHR
register
PM
DYIE
bit
Overflow
8-bit counter
WKIE
(1/256)
TREWK
register
000
(1s)
Overflow
Timing
control
INT
bit
Timer RE interrupt
14. Timers