UPD70F3738GF-GAS-AX Renesas Electronics America, UPD70F3738GF-GAS-AX Datasheet - Page 518

• 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: -

14.5 Operation
14.5.1 Basic operation
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<1> Set the operation mode, trigger mode, and conversion time for executing A/D conversion by using the
<2> When A/D conversion is started, the voltage input to the selected analog input channel is sampled by the
<3> Once the sample & hold circuit has sampled the input channel for a specific time, it enters the hold status,
<4> Set bit 9 of the successive approximation register (SAR). The tap selector selects (1/2) AV
<5> The voltage difference between the voltage of the compare voltage generation DAC and the analog input
<6> Next, bit 8 of the SAR register is automatically set and the next comparison is started. Depending on the
<7> This comparison is continued to bit 0 of the SAR register.
<8> When comparison of the 10 bits is complete, the valid digital result is stored in the SAR register, and is then
<9> In one-shot select mode, conversion stops here
ADA0M0, ADA0M1, ADA0M2, and ADA0S registers. When the ADA0CE bit of the ADA0M0 register is set,
conversion is started in the software trigger mode and the A/D converter waits for a trigger in the external or
timer trigger mode.
sample & hold circuit.
and holds the input analog voltage until A/D conversion is complete.
compare voltage generation DAC.
voltage is compared by the voltage comparator. If the analog input voltage is higher than (1/2) AV
MSB of the SAR register remains set (1). If it is lower than (1/2) AV
value of bit 9, to which a result has been already set, the voltage tap of the compare voltage generation DAC
is selected as follows.
• Bit 9 = 1: (3/4) AV
• Bit 9 = 0: (1/4) AV
This compare voltage and the analog input voltage are compared and, depending on the result, bit 8 is
manipulated as follows.
Analog input voltage ≥ Compare voltage: Bit 8 = 1
Analog input voltage ≤ Compare voltage: Bit 8 = 0
transferred to and stored in the ADA0CRn register. After that, an A/D conversion end interrupt request signal
(INTAD) is generated at the following timing.
• Continuous/one-shot select mode: After the fist A/D conversion is complete
• Continuous/one-shot scan mode:
once
In continuous scan mode, repeat steps <2> to <8> for each channel.
Remark
Note In the external trigger mode, timer trigger mode 0, or timer trigger mode 1, the trigger standby status
Note
is entered.
. In continuous select mode, repeat steps <2> to <8> until the ADA0M0.ADA0CE bit is cleared to 0.
The trigger standby status means the status after the stabilization time has passed.
REF0
REF0
CHAPTER 14 A/D CONVERTER
User’s Manual U18953EJ5V0UD
After A/D conversions are performed sequentially for analog input pins
up to the one specified by the ADA0S register
Note
. In one-shot scan mode, conversion stops after scanning
REF0
, the MSB is reset.
REF0
REF0
as the
, the