HD6417706F133 Renesas Electronics America, HD6417706F133 Datasheet - Page 408

• Manufacturer Part Number: HD6417706F133
• Description: IC SUPERH MPU ROMLESS 176LQFP
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7700r

Specifications of HD6417706F133

• Core Processor: SH-3
• Core Size: 32-Bit
• Speed: 133MHz
• Connectivity: EBI/EMI, FIFO, SCI, SmartCard
• Peripherals: DMA, POR, WDT
• Number Of I /o: 103
• Program Memory Type: ROMless
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 1.75 V ~ 2.05 V
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 176-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -

Section 13 Realtime Clock (RTC)
13.4.3
Figure 13.3 shows how to read the time. If a carry occurs while reading the time, the correct time
will not be obtained, so it must be read again. Part (a) in figure 13.3 shows the method of reading
the time without using interrupts; part (b) in figure 13.3 shows the method using carry interrupts.
To keep programming simple, method (a) should normally be used.
Rev. 5.00 May 29, 2006 page 358 of 698
REJ09B0146-0500
Reading the Time
Yes
Yes
(a)
(b) To use interrupts
Clear the carry flag
Clear the carry flag
To read the time
without using interrupts
Disable the carry
Disable the carry
Enable the carry
Carry flag = 1?
Read counter
Read counter
generated?
Figure 13.3 Reading the Time
interrupt
Interrupt
interrupt
register
register
interrupt
No
No
Write 0 to CIE in RCR1
Write 0 to CF in RCR1
Note: Set AF in RCR1 to 1 so that
Read RCR1 and check CF
Write 1 to CIE in RCR1,
and write 0 to CF in RCR1
Note: Set AF in RCR1 to 1 so that
Write 0 to CIE in RCR1
alarm flag is not cleared.
alarm flag is not cleared.