UPD70F3738GF-GAS-AX Renesas Electronics America, UPD70F3738GF-GAS-AX Datasheet - Page 537

• 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: -

(6) Internal equivalent circuit
(7) AV
(a) The AV
(b) The AV
(c) If the source supplying power to the AV
The following shows the equivalent circuit of the analog input block.
Note Parasitic inductance
REF0
power to the AV
enabled may be lower than the voltage when conversion is stopped, because of a voltage drop caused by
the A/D conversion current.
alternate-function ports. In an application where a backup power supply is used, be sure to supply the
same voltage as V
the reference voltage may fluctuate due to the current that flows during conversion (especially, immediately
after the conversion enable bit ADA0CE has been set to 1). As a result, the conversion accuracy may drop.
To avoid this, it is recommended to connect a capacitor across the AV
reference voltage fluctuation as shown in Figure 14-15.
pin
REF0
REF0
pin is also used as the reference voltage pin of the A/D converter. If the source supplying
pin is used as the power supply pin of the A/D converter and also supplies power to the
REF0
DD
Main power supply
Figure 14-14. Internal Equivalent Circuit of ANIn Pin
Remarks 1. The above values are reference values.
pin has a high impedance or if the power supply has a low current supply capability,
to the AV
Figure 14-15. Example of Handling AV
ANIn
REF0
2. n = 0 to 11
14 kΩ
CHAPTER 14 A/D CONVERTER
R
IN
User’s Manual U18953EJ5V0UD
pin as shown in Figure 14-15.
REF0
Note
pin has a high DC resistance, the voltage when conversion is
R
IN
8.0 pF
C
IN
REF0
C
AV
AV
IN
REF0
SS
Pin
REF0
and AV
SS
pins to suppress the
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