R5S72030W200FP Renesas Electronics America, R5S72030W200FP Datasheet - Page 748

• Manufacturer Part Number: R5S72030W200FP
• Description: IC SUPERH MPU ROMLESS 240QFP
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7200r

Specifications of R5S72030W200FP

• Core Processor: SH2A-FPU
• Core Size: 32-Bit
• Speed: 200MHz
• Connectivity: CAN, I²C, SCI, SSI, SSU, USB
• Peripherals: DMA, LCD, POR, PWM, WDT
• Number Of I /o: 82
• Program Memory Type: ROMless
• Ram Size: 80K x 8
• Voltage - Supply (vcc/vdd): 1.1 V ~ 3.6 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 240-QFP
• For Use With: R0K572030S000BE - KIT DEV FOR SH7203HS0005KCU11H - EMULATOR E10A-USB H8S(X),SH2(A)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Program Memory Size: -

Section 14 Realtime Clock (RTC)
14.4.3
Figure 14.3 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 14.3 shows the method of reading the time without using interrupts; part
(b) in figure 14.3 shows the method using carry interrupts. To keep programming simple, method
(a) should normally be used.
Rev. 3.00 Sep. 28, 2009 Page 716 of 1650
REJ09B0313-0300
Reading Time
Yes
Yes
(a) To read the time without using interrupts
(b) To read the time using interrupts
Disable the carry interrupt
Disable the carry interrupt
Enable the carry interrupt
Read counter register
Read counter register
Clear the carry flag
Clear the carry flag
Clear the carry flag
Carry flag = 1?
interrupt
Figure 14.3 Reading Time
No
No
Write 0 to CIE in RCR1
Write 0 to CF in RCR1
(Set AF in RCR1 to 1 so that alarm
Read RCR1 and check CF bit
Write 0 to CF in RCR1
(Set AF in RCR1 to 1 so that alarm
Write 0 to CIE in RCR1
Write 1 to CIE in RCR1
flag is not cleared.)
flag is not cleared.)