UPD78F1146AGB-GAH-AX Renesas Electronics America, UPD78F1146AGB-GAH-AX Datasheet - Page 282

• 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: -

7.4.3 Reading/writing real-time counter
280
Note Be sure to confirm that RWST = 0 before setting STOP mode.
Remark SEC, MIN, HOUR, WEEK, DAY, MONTH, and YEAR may be read in any sequence.
Read or write the counter after setting 1 to RWAIT first.
Caution Complete the series of operations of setting RWAIT to 1 to clearing RWAIT to 0 within 1 second.
All the registers do not have to be set and only some registers may be read.
Figure 7-21. Procedure for Reading Real-Time Counter
No
No
Reading MONTH
Reading HOUR
Reading WEEK
Reading YEAR
RWST = 0?
Reading SEC
Reading DAY
Reading MIN
CHAPTER 7 REAL-TIME COUNTER
RWST = 1?
RWAIT = 1
RWAIT = 0
Start
End
User’s Manual U17854EJ9V0UD
Yes
Yes
Note
Checks wait status of counter.
Stops SEC to YEAR counters.
Mode to read and write count values
Reads second count register.
Reads minute count register.
Reads week count register.
Reads day count register.
Reads month count register.
Reads year count register.
Sets counter operation.
Reads hour count register.