HD6417727F100V Renesas Electronics America, HD6417727F100V Datasheet - Page 531

• Manufacturer Part Number: HD6417727F100V
• Description: MPU 3V 16K PB-FREE 240-QFP
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7700r

Specifications of HD6417727F100V

• 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
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -

16.3
16.3.1
All RTC registers should be set initially after the power is turned on.
16.3.2
Figures 16.2 (a) and 16.2 (b) show how to set the time after stopping the clock. This procedure can
be used to set the entire calendar and clock function. It can be programmed easily.
Usage Notes
1. Initialization Timing for 64 Hz Counter (R64CNT)
2. Incrementing RSECCNT by Initializing R64CNT
If it is necessary, after initializing the counter by means of the RESET bit in the RTC’s RCR2
register, to confirm that the change has taken effect by reading the R64CNT value, wait at least
107 µs after setting the RESET bit to 1 before reading the R64CNT counter. Note that the
divider circuit (RTC prescaler) is also initialized when the RESET bit is set to 1.
Either method (a) or method (b) below may be used.
(a) After setting the RESET bit to 1 and confirming that R64CNT has been initialized, set the
(b) Set the START bit to 1 and the RESET bit to 1 at the same time. This process is shown in
START bit to 1. This process is shown in figure 16.2 (a).
figure 16.2 (b). Note that the processing indicated by the asterisk (*) in figure 16.2 (b) may
be omitted if nothing is written to the RCR2 register during an interval of approximately
107 µs after the START bit is set to 1.
RTC Operation
Initial Settings of Registers after Power-On
Setting the Time
Rev.6.00 Mar. 27, 2009 Page 473 of 1036
Section 16 Realtime Clock (RTC)
REJ09B0254-0600