UPD70F3785GJ-GAE-AX Renesas Electronics America, UPD70F3785GJ-GAE-AX Datasheet - Page 684
UPD70F3785GJ-GAE-AX
Manufacturer Part Number
UPD70F3785GJ-GAE-AX
Description
MCU 32BIT V850ES/JX3-E 144-LQFP
Manufacturer
Renesas Electronics America
Series
V850ES/Jx3-Er
Datasheet
1.UPD70F3778GF-GAT-AX.pdf
(1817 pages)
Specifications of UPD70F3785GJ-GAE-AX
Core Processor
RISC
Core Size
32-Bit
Speed
50MHz
Connectivity
CSI, EBI/EMI, Ethernet, I²C, UART/USART, USB
Peripherals
DMA, LVD, PWM, WDT
Number Of I /o
100
Program Memory Size
512KB (512K x 8)
Program Memory Type
FLASH
Ram Size
124K x 8
Voltage - Supply (vcc/vdd)
2.85 V ~ 3.6 V
Data Converters
A/D 12x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
*
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Available stocks
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Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
UPD70F3785GJ-GAE-AX
Manufacturer:
Renesas Electronics America
Quantity:
10 000
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12.4.9 Watch error correction example of real-time counter
V850ES/Jx3H.
resonator has been connected when designing the system, and the RC1SUBC and RC1SEC count operations to
correct the error are shown below.
682
(32.768 kHz)
(32.769 kHz)
(32.769 kHz)
The watch error correction function corrects deviation in the oscillation frequency of a resonator connected to the
Deviation, here, refers to steady-state deviation, which is deviation in the frequency when the resonator is designed.
Next, the timing chart when an error has occurred in the input clock intended to be 32.768 kHz but a 32.769 kHz
Notes 1. One second is counted by counting 32,768 (0000H to 7FFFH) with a 32.768 kHz clock.
RC1SUBC
RC1SUBC
RC1SUBC
RC1SEC
RC1SEC
RC1SEC
RTCCLK
RTCCLK
RTCCLK
2. Counting 32,768 (0000H to 7FFFH) with a 32.770 kHz clock results in 32,768/32,770 = 0.999939
3. With a 32.770 kHz clock, by counting to 32,770 (0000H to 8001H), one second can be counted
seconds.
Where an error of (32,768/32,770 − 1) × 60 (seconds) × 60 (minutes) × 24 (hours) × 30 (days) =
−158.2 seconds occurs per month.
without an error occurring.
7FFEH 7FFFH 0000H 0001H 0002H 0003H 0004H 0005H
7FFEH 7FFFH 0000H 0001H 0002H 0003H 0004H 0005H
7FFEH 7FFFH 0000H 0001H 0002H 0003H 0004H 0005H
00
00
00
Figure 12-10. Watch Error Correction Example
CHAPTER 12 REAL-TIME COUNTER
(32.769 kHz/no 0.002 error correction)
0.999939 seconds
User’s Manual U19601EJ2V0UD
(32.769 kHz/0.002 error correction)
Watch count (32.768 kHz)
1 second
1 second
Watch count
Watch count
01
01
01
Note 1
7FFEH 7FFFH 0000H 0001H 0002H 0003H 0004H
7FFEH 7FFFH 8000H 8001H 0000H 0001H 0002H
7FFDH 7FFEH 7FFFH 0000H 0001H 0002H 0003H
2 count numbers are added.
Note 3
Note 2
02
02
02
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