R5F21334CNFP#U0 Renesas Electronics America, R5F21334CNFP#U0 Datasheet - Page 317

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

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: -

R8C/33C Group
REJ09B0570-0100 Rev.1.00 Dec. 14, 2009
Page 287 of 589
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 20.2 lists the Real-Time Clock Mode Specifications.
Table 20.3 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.
(8.192kHz)
Real-Time Clock Mode
fC4
TOENA, 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
RCS4 to RCS6: Bits in TRECSR register
BSY
bit
TRESEC
Block Diagram of Real-Time Clock Mode
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
fC
f2
f4
f8
RCS6 to RCS4
= 010b
= 001b
= 100b
Timing
control
= 000b
= 011b
INT
bit
Timer RE
interrupt
TOENA
TREO pin
20. Timer RE