R5F21244SNFP#U0 Renesas Electronics America, R5F21244SNFP#U0 Datasheet - Page 290

• Manufacturer Part Number: R5F21244SNFP#U0
• Description: IC R8C MCU FLASH 16K 52LQFP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M16C/R8C/Tiny/24r

Specifications of R5F21244SNFP#U0

• Core Processor: R8C
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: I²C, LIN, SIO, SSU, UART/USART
• Peripherals: POR, Voltage Detect, WDT
• Number Of I /o: 41
• 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: -20°C ~ 85°C
• Package / Case: 52-LQFP
• For Use With: R0K521256S000BE - KIT EVAL STARTER FOR R8C/25
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/24 Group, R8C/25 Group
Rev.3.00
REJ09B0244-0300
Figure 14.113 Block Diagram of Real-Time Clock Mode
14.4.1
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 14.113
shows a Block Diagram of Real-Time Clock Mode and Table 14.37 lists the Real-Time Clock Mode
Specifications. Figures 14.114 to 14.118, and Figures 14.120 and 14.121 show the Registers Associated with
Real-Time Clock Mode. Table 14.38 lists the Interrupt Sources, Figure 14.119 shows the Definition of Time
Representation and Figure 14.122 shows the Operating Example in Real-Time Clock Mode.
H12_H24, PM, INT: Bits in TRECR1 register
BSY: Bit in registers TRESEC, TREMIN, TREHR, and TREWK
BSY
Feb 29, 2008
fC4
bit
TRESEC
register
Real-Time Clock Mode
MNIE
SEIE
Overflow
Page 271 of 485
1/2
TREMIN
register
HRIE
Overflow
4-bit counter
H12_H24
(1/16)
bit
Data bus
TREHR
register
PM
bit
DYIE
Overflow
WKIE
8-bit counter
(1/256)
TREWK
register
000
(1s)
Overflow
Timing
control
INT
bit
Timer RE
interrupt
14. Timers