UPD78F1506GF-GAT-AX Renesas Electronics America, UPD78F1506GF-GAT-AX Datasheet - Page 442

• Manufacturer Part Number: UPD78F1506GF-GAT-AX
• Description: MCU 16BIT 78K0R/LX3 128-LQFP
• Manufacturer: Renesas Electronics America
• Series: 78K0R/Lx3r

Specifications of UPD78F1506GF-GAT-AX

• Core Processor: 78K/0R
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: 3-Wire SIO, I²C, LIN, UART/USART
• Peripherals: DMA, LCD, LVD, POR, PWM, WDT
• Number Of I /o: 78
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 12x12b, D/A 2x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

78K0R/Lx3
13.4 Voltage Reference Operations
13.4.1 Reference voltage output mode
13.5 Cautions for Voltage Reference
R01UH0004EJ0401 Rev.4.01
Jul 2, 2010
<1> Set bit 5 (ADCEN) of peripheral enable register 0 (PER0) to 1 to start the supply of the input clock to the voltage
<2> Set bit 3 (VRSEL) of the analog reference voltage control register (ADVRC) to 1. The positive reference voltage of
<3> Specify the reference voltage value by using bit 1 (VRGV) of ADVRC.
<4> Enable voltage reference operation by setting bit 0 (VRON) of ADVRC to 1.
<5> Use software to wait until the voltage reference operation stabilizes (settling time: 17 ms (max.)).
Cautions 3. Rewriting DACSWn (n = 0, 1) during A/D conversion is prohibited when both the positive
The voltage reference has the following mode.
• Reference voltage output mode
The procedure for starting operation is described below.
Observe the following cautions when using the voltage reference.
• The V
of the microcontroller. Do not connect an external circuit other than a tantalum capacitor (capacitance: 10
ESR: 2 Ω (max.), ESL: 10 nH (max.)) and a ceramic capacitor (capacitance: 0.1
nH (max.)) to the V
A reference voltage is output from the V
internal A/D and D/A converters. 2.0 V (TYP.) or 2.5 V (TYP.) can be selected as the output voltage.
reference.
both the A/D and D/A converters or only the A/D converter is set to voltage reference output.
REFOUT
4. Do not change the output voltage of the reference voltage by using VRGV during the voltage
reference voltage of the A/D converter (AD
converter (DA
Rewrite it when conversion operation is stopped (ADCS = 0).
reference operation (VRON = 1).
output voltage can be used only as the positive reference voltage of the internal A/D and D/A converters
REFOUT
pin for stabilizing the reference voltage.
REFP
) are the voltage reference output (V
REFOUT
pin. Furthermore, the generated reference voltage is supplied to the
REFP
) and the positive reference voltage of the D/A
CHAPTER 13 VOLTAGE REFERENCE
REFOUT
μ
) (VRSEL = 1 and DAREF = 1).
F±30 %, ESR: 2 Ω (max.), ESL: 10
μ
F±30 %,
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