UPD70F3738GF-GAS-AX Renesas Electronics America, UPD70F3738GF-GAS-AX Datasheet - Page 549

• 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: -

15.4.3 Cautions
Observe the following cautions when using the D/A converter.
(1) Set the port pins to the input mode (PM1n bit = 1).
(2) Do not read or write the P1 register during D/A conversion.
(3) When using one of the P10/ANO0 and P11/ANO1 pins as an I/O port pin and the other as a D/A output pin, do
(4) In the real-time output mode, avoid a conflict between writing the DA0CSn register by software and trigger
(5) Make sure that AV
(6) Turn on or off AV
(7) Because the output impedance of the D/A converter is high, a current cannot be supplied from the ANOn pin.
(8) Because the D/A converter stops operating in the STOP mode, the ANO0 and ANO1 pins go into a high-
Remark n = 0, 1
so in an application where the port I/O level does not change during D/A output.
signal output, which can occur by writing the DA0CSn register while the interrupt requested by the selected
trigger signal is being serviced.
the above are used.
When connecting a resistor of 2 MΩ or lower, take appropriate measures such as inserting a JFET input type
operational amplifier between the resistor and the ANOn pin.
impedance state, and the power consumption can be reduced.
In the IDLE1, IDLE2, or subclock operation mode, however, the D/A converter continues operating. To lower
the power consumption, therefore, clear the DA0M.DA0CEn bit to 0.
Caution
The figure shown here is only for reference.
appropriateness.
REF1
REF1
at the same time as turning on or off AV
≤ V
Figure 15-2. Example of External Pin Connection
DD
and AV
AV
AV
ANOn
AV
REF0
REF1
CHAPTER 15 D/A CONVERTER
SS
REF1
User’s Manual U18953EJ5V0UD
= 2.7 to 3.6 V. The operation is not guaranteed if ranges other than
2 MΩ
0.1 F
0.1 F
−
+
μ
μ
JFET input
operational amplifier
10 F
10 F
μ
μ
REF0
.
Output
Use it after fully evaluating its
EV
DD
547