HD6417712BPV Renesas Electronics America, HD6417712BPV Datasheet - Page 569

• Manufacturer Part Number: HD6417712BPV
• Description: MPU 1.5/3.3V 0K PB-FREE 256-BGA
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH Ethernetr

Specifications of HD6417712BPV

• Core Processor: SH-3 DSP
• Core Size: 32-Bit
• Speed: 200MHz
• Connectivity: EBI/EMI, Ethernet, FIFO, SCI, SIO
• Peripherals: DMA, POR, WDT
• Number Of I /o: 24
• Program Memory Type: ROMless
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 1.4 V ~ 1.6 V
• Oscillator Type: External
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 256-BGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -

15.4
15.4.1
All the registers should be set after the power is turned on.
15.4.2
Figure 15.2 shows how to set the time when the clock is stopped.
15.4.3
Figure 15.3 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 15.3 shows the method of reading the time without using interrupts; part
(b) in figure 15.3 shows the method using carry interrupts. To keep programming simple, method
(a) should normally be used.
Operation
Initial Settings of Registers after Power-On
Setting Time
Reading Time
week, month, and year
Set seconds, minutes,
hour, day, day of the
reset divider circuit
Stop clock,
Start clock
Figure 15.2 Setting Time
Write 1 to RESET and 0 to
START in the RCR2 register
Order is irrelevant
Write 1 to START in the
RCR2 register
Rev. 1.00 Dec. 27, 2005 Page 525 of 932
Section 15 Realtime Clock (RTC)
REJ09B0269-0100