UPD70F3738GF-GAS-AX Renesas Electronics America, UPD70F3738GF-GAS-AX Datasheet - Page 459

• 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: -

10.5 Cautions
(1) Operation as watch timer
(2) When watch timer and interval timer WT operate simultaneously
It takes 0.515625 seconds (max.) for the first INTWT signal to be generated (2
longer (max.)). The INTWT signal is then generated every 0.5 seconds.
The first watch timer interrupt request signal (INTWT) is not generated at the exact time specified using the
WTM2 and WTM3 bits after operation is enabled (WTM.WTM1 and WTM.WTM0 bits = 11). The second and
subsequent INTWT signals are generated at the specified time.
The interval time of interval timer WT can be set to a value between 488
changed later.
Do not stop interval timer WT (by clearing the WTM.WTM0 bit to 0) while the watch timer is operating. If the
WTM0 bit is set to 1 again after it had been cleared to 0, the watch timer will have a discrepancy of up to 0.5 or
0.25 seconds.
Figure 10-3. Example of Generation of Watch Timer Interrupt Request Signal (INTWT)
WTM0, WTM1
INTWT
(When Interrupt Cycle = 0.5 s)
CHAPTER 10 WATCH TIMER
0.515625 s
User’s Manual U18953EJ5V0UD
0.5 s
0.5 s
9
× 1/32768 = 0.015625 seconds
μ
s and 62.5 ms. It cannot be
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