UPD78F0550MA-FAA-AX Renesas Electronics America, UPD78F0550MA-FAA-AX Datasheet - Page 341

• Manufacturer Part Number: UPD78F0550MA-FAA-AX
• Description: MCU 8BIT 16-SSOP
• Manufacturer: Renesas Electronics America
• Series: 78K0/Kx2-Lr

Specifications of UPD78F0550MA-FAA-AX

• Package / Case: *
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Speed: 10MHz
• Number Of I /o: 12
• Core Processor: 78K/0
• Program Memory Type: FLASH
• Ram Size: 384 x 8
• Program Memory Size: 4KB (4K x 8)
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Peripherals: LVD, POR, PWM, WDT
• Connectivity: I²C, LIN, UART/USART
• Core Size: 8-Bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

10.3 Registers Controlling Real-Time Counter
The real-time counter is controlled by the following 16 registers.
(1) Peripheral enable register 0 (PER0)
(2) Real-time counter control register 0 (RTCC0)
Address: FF25H
The RTCC0 register is an 8-bit register that is used to start or stop the real-time counter operation, control the
RTCCL and RTC1HZ pins, and set a 12- or 24-hour system and the constant-period interrupt function.
RTCC0 can be set by a 1-bit or 8-bit memory manipulation instruction.
Reset signal generation clears this register to 00H.
Symbol
This register controls the supply of the real-time counter control clock. The power consumption can be
reduced by stopping the real-time counter control clock supply.
PER0 can be set by a 1-bit or 8-bit memory manipulation instruction.
Reset signal generation clears this register to 00H.
PER0
Note The control clock supply stopped by clearing RTCEN to 0 is the clock to be used when write-
Caution Be sure to clear bits 0 to 6 of PER0 to “0”.
RTCEN
RTCEN
7
0
1
After reset: 00H
accessing the registers (such as the RTCC0 register) to be used for the real-time counter
(RTC) from the CPU. The RTC operating clock (f
to 0.
Figure 10-2. Format of Peripheral Enable Register 0 (PER0)
Stops supply of control clock.
Supplies control clock.
SFR used by the real-time counter cannot be written (can be read).
Operation of the real-time counter continues.
SFR used by the real-time counter can be read and written.
6
0
CHAPTER 10 REAL-TIME COUNTER
R/W
Preliminary User’s Manual U19111EJ2V1UD
5
0
Control of real-time counter (RTC) control clock
4
0
3
0
SUB
) does not stop, even if RTCEN is cleared
2
0
Note
1
0
0
0
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