UPD70F3737GC-UEU-AX Renesas Electronics America, UPD70F3737GC-UEU-AX Datasheet - Page 452

• Manufacturer Part Number: UPD70F3737GC-UEU-AX
• Description: MCU 32BIT V850ES/JX3-L 100-LQFP
• Manufacturer: Renesas Electronics America
• Series: V850ES/Jx3-Lr

Specifications of UPD70F3737GC-UEU-AX

• Package / Case: *
• Voltage - Supply (vcc/vdd): 2.2 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Speed: 20MHz
• Number Of I /o: 84
• Core Processor: RISC
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Program Memory Size: 128KB (128K x 8)
• Data Converters: A/D 12x10b, D/A 2x8b
• Oscillator Type: Internal
• Peripherals: DMA, LVD, PWM, WDT
• Connectivity: CSI, EBI/EMI, I²C, UART/USART
• Core Size: 32-Bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

13.6 Cautions
452
(1) When A/D converter is not used
(2) Input range of ANI0 to ANI11 pins
(3) Countermeasures against noise
(4) Alternate I/O
When the A/D converter is not used, the power consumption can be reduced by clearing the ADA0M0.ADA0CE
bit to 0.
Input the voltage within the specified range to the ANI0 to ANI11 pins. If a voltage equal to or higher than
AV
these pins, the conversion value of that channel is undefined, and the conversion value of the other channels
may also be affected.
To maintain the 10-bit resolution, the ANI0 to ANI11 pins must be effectively protected from noise. The
influence of noise increases as the output impedance of the analog input source becomes higher. To lower the
noise, connecting an external capacitor as shown in Figure 13-12 is recommended.
The analog input pins (ANI0 to ANI11) function alternately as port pins. When selecting one of the ANI0 to
ANI11 pins to execute A/D conversion, do not execute an instruction to read an input port or write to an output
port during conversion as the conversion resolution may drop.
Also the conversion resolution may drop at the pins set as output port pins during A/D conversion if the output
current fluctuates due to the effect of the external circuit connected to the port pins.
If a digital pulse is applied to a pin adjacent to the pin whose input signal is being converted, the A/D
conversion value may not be as expected due to the influence of coupling noise. Therefore, do not apply a
pulse to a pin adjacent to the pin undergoing A/D conversion.
REF0
or equal to or lower than AV
Figure 13-12. Processing of Analog Input Pin
Preliminary User’s Manual U18953EJ1V0UD
SS
CHAPTER 13 A/D CONVERTER
(even within the range of the absolute maximum ratings) is input to any of
Clamp with a diode with a low V
if noise equal to or higher than AV
to or lower than AV
ANI0 to ANI11
V
AV
AV
V
DD
SS
REF0
SS
SS
may be generated.
F
(0.3 V or less)
REF0
or equal