HD64F36077GHV Renesas Electronics America, HD64F36077GHV Datasheet - Page 191

• 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

10.3
The RTC has the following registers.
• 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)
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
Register Descriptions
Second Data Register/Free Running Counter Data Register (RSECDR)
Bit Name
BSY
SC12
SC11
SC10
SC03
SC02
SC01
SC00
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. 1.00 Sep. 16, 2005 Page 161 of 490
Section 10 Realtime Clock (RTC)
REJ09B0216-0100