UPD78F0550MA-FAA-AX Renesas Electronics America, UPD78F0550MA-FAA-AX Datasheet - Page 363

• 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: -

Example of correcting from 32767.4 Hz to 32768 Hz (32767.4 Hz + 18.3 ppm)
[Measuring the oscillation frequency]
outputting about 1 Hz from the RTC1HZ pin when the watch error correction register is set to its initial value (00H).
Note Refer to 10.4.4 1 Hz output of real-time counter for the setting procedure of outputting about 1 Hz from
[Calculating the correction value]
[Calculating the values to be set to (F6 to F0)]
Correction example <2>
The oscillation frequency
(When the output frequency from the RTCCL pin is 0.9999817 Hz)
Oscillation frequency = 32768
Assume the target frequency to be 32768 Hz (32767.4 Hz + 18.3 ppm) and DEV to be 1.
The expression for calculating the correction value when DEV is 1 is applied.
(When the correction value is 36)
If the correction value is 0 or less (when quickening), assume F6 to be 1.
Calculate (F5, F4, F3, F2, F1, F0) from the correction value.
Consequently, when correcting from 32767.4 Hz to 32768 Hz (32767.4 Hz + 18.3 ppm), setting the correction
register such that DEV is 1 and the correction value is 36 (bits 6 to 0 of SUBCUD: 1101110) results in 32768
Hz (0 ppm).
Figure 10-26 shows the operation when (DEV, F6, F5, F4, F3, F2, F1, F0) is (1, 1, 1, 0, 1, 1, 1, 0).
the RTC1HZ pin, and 10.4.5
outputting about 32 kHz from the RTCCL pin.
Correction value = Number of correction counts in 1 minute
(/F5, /F4, /F3, /F2, /F1, /F0)
(/F5, /F4, /F3, /F2, /F1, /F0)
(F5, F4, F3, F2, F1, F0)
{(/F5, /F4, /F3, /F2, /F1, /F0)
Note
= (Oscillation frequency
= (32767.4
= 36
of each product is measured by outputting about 32 kHz from the RTCCL pin or
0.9999817
CHAPTER 10 REAL-TIME COUNTER
Preliminary User’s Manual U19111EJ2V1UD
32.768 kHz output of real-time counter for the setting procedure of
32768
1}
32767.4 Hz
2
1)
Target frequency
32768
= 36
= 17
= (0, 1, 0, 0, 0, 1)
= (1, 0, 1, 1, 1, 0)
60
1)
32768
60
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