D6417709SHF200BV Renesas Electronics America, D6417709SHF200BV Datasheet - Page 469

• Manufacturer Part Number: D6417709SHF200BV
• Description: IC SUPER H MPU ROMLESS 208LQFP
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7700r

Specifications of D6417709SHF200BV

• Core Processor: SH-3
• Core Size: 32-Bit
• Speed: 200MHz
• Connectivity: EBI/EMI, FIFO, IrDA, SCI, SmartCard
• Peripherals: DMA, POR, WDT
• Number Of I /o: 96
• Program Memory Type: ROMless
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 1.85 V ~ 2.15 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 208-QFP Exposed Pad, 208-eQFP, 208-HQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -

13.3.3
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.
Reading the Time
Yes
Yes
b. To use interrupts
a.
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?
interrupt
Interrupt
interrupt
register
register
interrupt
Figure 13.3 Reading the Time
No
No
Clear CIE in RCR1 to 0
Write 0 to CF in RCR1
Note: Set AF to 1 so that alarm
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
flag is not cleared.
alarm flag is not cleared.
Rev. 5.00, 09/03, page 423 of 760