HD6417727F100CV Renesas Electronics America, HD6417727F100CV Datasheet - Page 533

• Manufacturer Part Number: HD6417727F100CV
• Description: SH3-DSP, LEAD FREE
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7700r

Specifications of HD6417727F100CV

• Core Processor: SH-3 DSP
• Core Size: 32-Bit
• Speed: 100MHz
• Connectivity: FIFO, SCI, SIO, SmartCard, USB
• Peripherals: DMA, LCD, POR, WDT
• Number Of I /o: 104
• Program Memory Type: ROMless
• Ram Size: 32K x 8
• Voltage - Supply (vcc/vdd): 1.6 V ~ 2.05 V
• Data Converters: A/D 6x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 240-QFP Exposed Pad, 240-eQFP, 240-HQFP
• Cpu Family: SuperH
• Device Core Size: 32b
• Frequency (max): 100MHz
• Interface Type: SCI/USB
• Program Memory Size: Not Required
• Total Internal Ram Size: 16KB
• # I/os (max): 104
• Number Of Timers - General Purpose: 4
• Operating Supply Voltage (typ): 1.8/3.3V
• Operating Supply Voltage (max): 2.05/3.6V
• Operating Supply Voltage (min): 1.6/2.6V
• On-chip Adc: 6-chx10-bit
• On-chip Dac: 2-chx8-bit
• Instruction Set Architecture: RISC
• Operating Temp Range: -20C to 75C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 240
• Package Type: HQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Lead Free Status / Rohs Status: Compliant

16.3.3
Figure 16.3 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. The method of reading the time without using
interrupts is shown at (a) in figure 16.3, and the method using carry interrupts is shown at (b). To
keep the program simple, method (a) is used normally.
Reading the Time
Yes
Yes
b. To use interrupts
a.
Clear the carry flag
Clear the carry flag
Disable the carry
To read the time
without using interrupts
Disable the carry
Enable the carry
Carry flag = 1?
Read counter
Read counter
generated?
Interrupt
interrupt
interrupt
register
register
interrupt
Figure 16.3 Reading the Time
No
No
Write 0 to CIE in RCR1
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
alarm flag is not cleared.
flag is not cleared.
Rev.6.00 Mar. 27, 2009 Page 475 of 1036
Section 16 Realtime Clock (RTC)
REJ09B0254-0600