HD64F3687GH Renesas Electronics America, HD64F3687GH Datasheet - Page 183
HD64F3687GH
Manufacturer Part Number
HD64F3687GH
Description
IC H8 MCU FLASH 56K 64-QFP
Manufacturer
Renesas Electronics America
Series
H8® H8/300H Tinyr
Datasheet
1.HD64F3684GFPV.pdf
(538 pages)
Specifications of HD64F3687GH
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-QFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
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10.3.7
RTCCSR selects clock source. A free running counter controls start/stop of counter operation by
the RUN bit in RTCCR1. When a clock other than 32.768 kHz is selected, the RTC is disabled
and operates as an 8-bit free running counter. When the RTC operates as an 8-bit free running
counter, RSECDR enables counter values to be read. An interrupt can be generated by setting 1 to
the FOIE bit in RTCCR2 and enabling an overflow interrupt of the free running counter. A clock
in which the system clock is divided by 32, 16, 8, or 4 is output in active or sleep mode.
Legend: X: Don't care.
Bit
7
6
5
4
3
2
1
0
Bit Name
—
RCS6
RCS5
—
RCS3
RCS2
RCS1
RCS0
Clock Source Select Register (RTCCSR)
Initial
Value
0
0
0
0
1
0
0
0
R/W
—
R/W
R/W
—
R/W
R/W
R/W
R/W
Description
Reserved
This bit is always read as 0.
Clock output selection
Selects a clock output from the TMOW pin when setting
TMOW in PMR1 to 1.
00: /4
01: /8
10: /16
11: /32
Reserved
This bit is always read as 0.
Clock source selection
0000: /8
0001: /32
0010: /128
0011: /256
0100: /512
0101: /2048
0110: /4096
0111: /8192
1XXX: 32.768 kHz
Free running counter operation
Free running counter operation
Free running counter operation
Free running counter operation
Free running counter operation
Free running counter operation
Free running counter operation
Free running counter operation
Rev.5.00 Nov. 02, 2005 Page 149 of 500
RTC operation
Section 10 Realtime Clock (RTC)
REJ09B0027-0500
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