UPD78F1506GF-GAT-AX Renesas Electronics America, UPD78F1506GF-GAT-AX Datasheet - Page 379
UPD78F1506GF-GAT-AX
Manufacturer Part Number
UPD78F1506GF-GAT-AX
Description
MCU 16BIT 78K0R/LX3 128-LQFP
Manufacturer
Renesas Electronics America
Series
78K0R/Lx3r
Datasheet
1.UPD78F1500GK-GAK-AX.pdf
(1016 pages)
Specifications of UPD78F1506GF-GAT-AX
Core Processor
78K/0R
Core Size
16-Bit
Speed
20MHz
Connectivity
3-Wire SIO, I²C, LIN, UART/USART
Peripherals
DMA, LCD, LVD, POR, PWM, WDT
Number Of I /o
78
Program Memory Size
64KB (64K x 8)
Program Memory Type
FLASH
Ram Size
4K x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 5.5 V
Data Converters
A/D 12x12b, D/A 2x12b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
*
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
- Current page: 379 of 1016
- Download datasheet (7Mb)
78K0R/Lx3
R01UH0004EJ0401 Rev.4.01
Jul 2, 2010
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 See 7.4.5 1 Hz output of real-time counter for the setting procedure of outputting about 1 Hz from the RTC1HZ
[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 RTC1Hz 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 speeding up), 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 7-28 shows the operation when (DEV, F6, F5, F4, F3, F2, F1, F0) is (1, 1, 1, 0, 1, 1, 1, 0).
pin, and 7.4.6 32.768 kHz output of real-time counter for the setting procedure of outputting about 32 kHz from
the RTCCL pin.
Correction value = Number of correction counts in 1 minute
− {(/F5, /F4, /F3, /F2, /F1, /F0) + 1}
(/F5, /F4, /F3, /F2, /F1, /F0)
(/F5, /F4, /F3, /F2, /F1, /F0)
(F5, F4, F3, F2, F1, F0)
Note
= (Oscillation frequency ÷ Target frequency − 1)
= (32767.4 ÷ 32768 − 1)
= −36
of each product is measured by outputting about 32 kHz from the RTCCL pin or
0.9999817 ≈ 32767.4 Hz
2
32768
= −36
= 17
= (0, 1, 0, 0, 0, 1)
= (1, 0, 1, 1, 1, 0)
60
CHAPTER 7 REAL-TIME COUNTER
32768
60
379
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