HD64F3684FP Renesas Electronics America, HD64F3684FP Datasheet - Page 177

• Manufacturer Part Number: HD64F3684FP
• Description: IC H8 MCU FLASH 32K 64LQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300H Tinyr

Specifications of HD64F3684FP

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: I²C, SCI
• Peripherals: PWM, WDT
• Number Of I /o: 45
• Program Memory Size: 32KB (32K 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: -

10.3
The RTC has the following registers.
10.3.1
RSECDR counts the BCD-coded second value. The setting range is decimal 00 to 59. It is an 8-bit
read register used as a counter, when it operates as a free running counter. For more information
on reading seconds, minutes, hours, and day-of-week, see section 10.4.3, Data Reading Procedure.
Bit
7
6
5
4
3
2
1
0
Second data register/free running counter data register (RSECDR)
Minute data register (RMINDR)
Hour data register (RHRDR)
Day-of-week data register (RWKDR)
RTC control register 1 (RTCCR1)
RTC control register 2 (RTCCR2)
Clock source select register (RTCCSR)
Bit Name
BSY
SC12
SC11
SC10
SC03
SC02
SC01
SC00
Register Descriptions
Second Data Register/Free Running Counter Data Register (RSECDR)
Initial
Value
—
—
—
—
—
—
—
—
R/W
R
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Description
RTC busy
This bit is set to 1 when the RTC is updating (operating)
the values of second, minute, hour, and day-of-week data
registers. When this bit is 0, the values of second, minute,
hour, and day-of-week data registers must be adopted.
Counting ten’s position of seconds
Counts on 0 to 5 for 60-second counting.
Counting one’s position of seconds
Counts on 0 to 9 once per second. When a carry is
generated, 1 is added to the ten’s position.
Rev.5.00 Nov. 02, 2005 Page 143 of 500
Section 10 Realtime Clock (RTC)
REJ09B0027-0500