UPD78F1142AGA-HAB-AX Renesas Electronics America, UPD78F1142AGA-HAB-AX Datasheet - Page 286
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UPD78F1142AGA-HAB-AX
Manufacturer Part Number
UPD78F1142AGA-HAB-AX
Description
MCU 16BIT 78K0R/KX3 64-TQFP
Manufacturer
Renesas Electronics America
Series
78K0R/Kx3r
Datasheet
1.UPD78F1142AGA-HAB-AX.pdf
(880 pages)
Specifications of UPD78F1142AGA-HAB-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
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 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
*
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
UPD78F1142AGA-HAB-AX
Manufacturer:
Renesas Electronics America
Quantity:
10 000
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7.4.8 Example of watch error correction of real-time counter
correction register.
284
(When DEV = 0)
(When DEV = 1)
Note The correction value is the watch error correction value calculated by using bits 6 to 0 of the watch error
Remarks 1.
The watch can be corrected with high accuracy when it is slow or fast, by setting a value to the watch error
Example of calculating the correction value
The correction value used when correcting the count value of the sub-count register (RSUBC) is calculated by
using the following expression.
Set DEV to 0 when the correction range is −63.1 ppm or less, or 63.1 ppm or more.
Correction value
Correction value
correction register (SUBCUD).
2.
3.
(When F6 = 0) Correction value = {(F5, F4, F3, F2, F1, F0) − 1}
(When F6 = 1) Correction value = − {(/F5, /F4, /F3, /F2, /F1, /F0) + 1}
When (F6, F5, F4, F3, F2, F1, F0) is (*, 0, 0, 0, 0, 0, *), watch error correction is not performed. “*” is 0
or 1.
/F5 to /F0 are bit-inverted values (000011 when 111100).
The correction value is 2, 4, 6, 8, … 120, 122, 124 or −2, −4, −6, −8, … −120, −122, −124.
The oscillation frequency is the subsystem clock (f
It can be calculated from the 32 kHz output frequency of the RTCCL pin or the output frequency of
the RTC1HZ pin
The target frequency is the frequency resulting after correction performed by using the watch error
correction register.
Note
Note
= Number of correction counts in 1 minute = (Oscillation frequency ÷ Target frequency − 1)
= Number of correction counts in 1 minute ÷ 3 = (Oscillation frequency ÷ Target frequency
− 1)
32768
32768
32768 when the watch error correction register is set to its initial value (00H).
CHAPTER 7 REAL-TIME COUNTER
60
60 ÷ 3
User’s Manual U17854EJ9V0UD
SUB
).
2
2
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