UPD70F3738GF-GAS-AX Renesas Electronics America, UPD70F3738GF-GAS-AX Datasheet - Page 489

• 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: -

(3) DEV bit
The DEV bit determines when the setting by the F6 to F0 bits is enabled.
The value set by the F6 to F0 bits is reflected upon the next timing, but not to the RC1SUBC count value every
time.
As described above, the RC1SUBC count value is corrected every 20 seconds or 60 seconds, instead of every
second, in order to match the RC1SUBC count value with the deviation width of the resonator.
The range in which the resonator frequency can be actually corrected is shown below.
The range in which the frequency can be corrected when the DEV bit is 0 is three times wider than when the
DEV bit is 1.
However, the accuracy of setting the frequency when the DEV bit is 1 is three times that when the DEV bit is 0.
Tables 11-7 and 11-8 show the setting values of the DEV, and F6 to F0 bits, and the corresponding frequencies
that can be corrected.
[Example when 0010101B is set to F6 to F0 bits]
• If the DEV bit is 0: 32.76180000 kHz to 32.77420000 kHz
• If the DEV bit is 1: 32.76593333 kHz to 32.77006667 kHz
• If the DEV bit is 0
• IF DEV bit is 1
The RC1SUBC count value is 32,808 at 00, 20, or 40 seconds.
Otherwise, it is 32,768.
The RC1SUBC count value is 32,808 at 00 seconds.
Otherwise, it is 32,768.
0
1
DEV Bit Value
CHAPTER 11 REAL-TIME COUNTER (
Table 11-6. DVE Bit Setting
User’s Manual U18953EJ5V0UD
When RC1SEC is 00, 20, or 40 seconds.
When RC1SEC is 00 seconds.
Timing of Reflecting Value to RC1SUBC
PD70F3792, 70F3793)
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