UPD70F3738GF-GAS-AX Renesas Electronics America, UPD70F3738GF-GAS-AX Datasheet - Page 474

• Manufacturer Part Number: UPD70F3738GF-GAS-AX
• Description: MCU 32BIT V850ES/JX3-L 100-LQFP
• Manufacturer: Renesas Electronics America
• Series: V850ES/Jx3-Lr

Specifications of UPD70F3738GF-GAS-AX

• Core Processor: RISC
• Core Size: 32-Bit
• Speed: 20MHz
• Connectivity: CSI, EBI/EMI, I²C, UART/USART
• Peripherals: DMA, LVD, PWM, WDT
• Number Of I /o: 84
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 2.2 V ~ 3.6 V
• Data Converters: A/D 12x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

472
(13) Watch error correction register (RC1SUBU)
Remark
The RC1SUBU register can be used to correct the watch with high accuracy when the watch is early or late,
by changing the value (reference value: 7FFFH) overflowing from the sub-count register (RSUBC) to the
second counter register.
This register can be read or written in 8-bit or 1-bit units.
Reset sets this register to 00H.
Remarks 1. The RC1SUBU register can be rewritten only when the real-time counter is set to its initial
RC1SUBU
When RTC back up mode, Watch error correction is stop.
2. See 11.4.9 Watch error correction example of real-time counter for details of watch error
After reset: 00H
values. Be sure to see 11.4.1 Initial settings.
correction.
If the F6 to F0 bit values are {1/0, 0, 0, 0, 0, 0, 1/0}, watch error correction is not
performed.
CHAPTER 11 REAL-TIME COUNTER (
DEV
DEV
F6
7
0
1
0
1
Corrects watch errors when RC1SEC (second counter) is at 00, 20, or
40 seconds (every 20 seconds).
Corrects watch errors when RC1SEC (second counter) is at 00 seconds
(every 60 seconds).
Increments the RC1SUBC count value by the value set using the F5 to
F0 bits (positive correction).
Expression for calculating increment value:
Decrements the RC1SUBC count value by the value set using the F5 to
F0 bits (negative correction).
Expression for calculating decrement value:
R/W
F6
6
(Setting value of F5 to F0 bits − 1) × 2
(Inverted value of setting value of F5 to F0 bits + 1) × 2
User’s Manual U18953EJ5V0UD
Address: FFFFFAD9H
F5
5
Setting of watch error correction timing
Setting of watch error correction value
F4
4
PD70F3792, 70F3793)
F3
3
F2
2
F1
1
F0
0