UPD78F1146AGB-GAH-AX Renesas Electronics America, UPD78F1146AGB-GAH-AX Datasheet - Page 274

• Manufacturer Part Number: UPD78F1146AGB-GAH-AX
• Description: MCU 16BIT 78K0R/KX3 64-LQFP
• Manufacturer: Renesas Electronics America
• Series: 78K0R/Kx3r

Specifications of UPD78F1146AGB-GAH-AX

• Core Processor: 78K/0R
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: 3-Wire SIO, I²C, LIN, UART/USART
• Peripherals: DMA, LVD, POR, PWM, WDT
• Number Of I /o: 50
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 12K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

272
Address: FFF96H
(9) Day count register (DAY)
Symbol
DAY
The DAY register is an 8-bit register that takes a value of 1 to 31 (decimal) and indicates the count value of
days.
It counts up when the hour counter overflows.
This counter counts as follows.
• 01 to 31 (January, March, May, July, August, October, December)
• 01 to 30 (April, June, September, November)
• 01 to 29 (February, leap year)
• 01 to 28 (February, normal year)
When data is written to this register, it is written to a buffer and then to the counter up to 2 clocks (32.768 kHz)
later. Even if the hour count register overflows while this register is being written, this register ignores the
overflow and is set to the value written. Set a decimal value of 01 to 31 to this register in BCD code. If a value
outside the range is set, the register value returns to the normal value after 1 period.
DAY can be set by an 8-bit memory manipulation instruction.
Reset signal generation clears this register to 01H.
7
0
After reset: 01H
6
0
Figure 7-10. Format of Day Count Register (DAY)
R/W
CHAPTER 7 REAL-TIME COUNTER
DAY20
5
User’s Manual U17854EJ9V0UD
DAY10
4
DAY8
3
DAY4
2
DAY2
1
DAY1
0