HD64F3687GFP Renesas Electronics America, HD64F3687GFP Datasheet - Page 184
HD64F3687GFP
Manufacturer Part Number
HD64F3687GFP
Description
IC H8 MCU FLASH 56K 64-LQFP
Manufacturer
Renesas Electronics America
Series
H8® H8/300H Tinyr
Datasheet
1.HD64F3684GFPV.pdf
(538 pages)
Specifications of HD64F3687GFP
Core Processor
H8/300H
Core Size
16-Bit
Speed
20MHz
Connectivity
I²C, SCI
Peripherals
LVD, POR, PWM, WDT
Number Of I /o
45
Program Memory Size
56KB (56K x 8)
Program Memory Type
FLASH
Ram Size
4K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 75°C
Package / Case
64-LQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
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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.5.00 Nov. 02, 2005 Page 150 of 500
REJ09B0027-0500
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.
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