HD64F36077GHV Renesas Electronics America, HD64F36077GHV Datasheet - Page 198

• Manufacturer Part Number: HD64F36077GHV
• Description: 16BIT MCU FLASH 56K, SMD, LQFP64
• Manufacturer: Renesas Electronics America

Specifications of HD64F36077GHV

• No. Of I/o's: 47
• Ram Memory Size: 4KB
• Cpu Speed: 20MHz
• No. Of Timers: 4
• Digital Ic Case Style: LQFP
• Supply Voltage Range: 4.5V
• Core Size: 16bit
• Program Memory Size: 56KB
• Oscillator Type: External Only
• Controller Family/series: H8/300H
• Peripherals: ADC
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Section 10 Realtime Clock (RTC)
10.4
10.4.1
The RTC registers that store second, minute, hour, and day-of week data are not reset by a RES
input. Therefore, all registers must be set to their initial values after power-on. Once the register
setting are made, the RTC provides an accurate time as long as power is supplied regardless of a
RES input.
10.4.2
Figure 10.3 shows the procedure for the initial setting of the RTC. To set the RTC again, also
follow this procedure.
Rev. 1.00 Sep. 16, 2005 Page 168 of 490
REJ09B0216-0100
Operation
Initial Settings of Registers after Power-On
Initial Setting Procedure
Set RTCCSR, RSECDR,
RMINDR,RHRDR,
RWKDR,12/24 in
RTCCR1, and PM
RUN in RTCCR1=0
RUN in RTCCR1=1
RST in RTCCR1=1
RST in RTCCR1=0
Figure 10.3 Initial Setting Procedure
RTC operation is stopped.
RTC registers and clock count
controller are reset.
Clock output and clock source are
selected and second, minute, hour,
day-of-week,operating mode, and
a.m/p.m are set.
RTC operation is started.