UPD78F1506GF-GAT-AX Renesas Electronics America, UPD78F1506GF-GAT-AX Datasheet - Page 401

• 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: -

<R>
78K0R/Lx3
(4) Analog reference voltage control register (ADVRC)
Address: FFF36H
R01UH0004EJ0401 Rev.4.01
Jul 2, 2010
ADVRC
Symbol
Caution 1. When using the A/D converter in normal mode 2 (LV1 = 0, LV0 = 1) or low voltage mode (LV1 = 1,
This register is used to select the reference voltage supplies of the A/D and D/A converters, control the operation of the input
gate voltage boost circuit for the A/D converter, and control the voltage reference (VR) operation.
The electrical specifications of the A/D converter can be maintained even during low-voltage operation thanks to the
operation of the input gate voltage boost circuit for the A/D converter.
ADVRC can be set by a 1-bit or 8-bit memory manipulation instruction.
Reset signal generation clears this register to 00H.
ADREF
ADREF
VRSEL
0
1
7
0
0
1
1
1
1
LV0 = 0), enable the input gate voltage boost circuit for the A/D converter by using the analog
reference voltage control register (ADVRC), and then set ADCE and ADCS to 1. After the voltage
boost circuit stabilization time (10
converter has been enabled, set ADCS to 1.
Other than the above
After reset: 00H
Figure 10-8. Format of Analog Reference Voltage Control Register (ADVRC)
AV
AV
SS
REFM
VRGV
6
0
0
1
0
0
1
1
(external voltage reference input)
R/W
Negative reference voltage supply selection of A/D converter selection
VRON
5
0
0
0
0
1
0
1
AV
reference input)
V
(voltage reference
output)
Setting prohibited
Positive reference
(external voltage
voltage supplies
selection of A/D
REFOUT
REFP
converters
μ
and D/A
s) passes after the input gate voltage boost circuit for the A/D
4
0
VRSEL
Stops
operation
(Hi-Z)
Stops
operation
(pull-down
output)
Enables
operation
Stops
operation
(pull-down
output)
Enables
operation
Operation
3
control of
reference
voltage
2.5 V
2.0 V
2.5 V
2.5 V
2.0 V
2.0 V
of voltage
reference
selection
voltage
Output
2
0
CHAPTER 10 A/D CONVERTER
Stops
operation
Enables
operation
Stops
operation
Enables
operation
circuit for A/D
voltage boost
Operation
input gate
control of
converter
VRGV
1
Can be set in
normal mode
1.
Can be set in
normal mode
2 or low
voltage mode.
Can be set in
normal mode
2 or low
voltage mode.
Can be set in
normal mode
2 or low
voltage mode.
Relationship
conversion
mode used
with the
VRON
−
−
0
401