UPD78F1211GB-GAF-AX Renesas Electronics America, UPD78F1211GB-GAF-AX Datasheet - Page 535

• Manufacturer Part Number: UPD78F1211GB-GAF-AX
• Description: MCU 16BIT 78K0R/LX3 44-LQFP
• Manufacturer: Renesas Electronics America
• Series: 78K0R/Ix3r

Specifications of UPD78F1211GB-GAF-AX

• Core Processor: 78K/0R
• Core Size: 16-Bit
• Speed: 40MHz
• Connectivity: 3-Wire SIO, I²C, LIN, UART/USART
• Peripherals: DMA, LVD, POR, PWM, WDT
• Number Of I /o: 33
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 10x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

8.4 Operations of Comparator and Programmable Gain Amplifier
8.4.1 Starting comparator and programmable gain amplifier operation
separately for each use method.
Figure 8-9. Using the External Pin Input for the Comparator Reference Voltage (Using Only a Comparator)
The procedures for starting the operation of a comparator and an programmable gain amplifier are described below,
Using only a comparator
• Using the external pin input for the comparator reference voltage (Figure 8-9)
• Using the internal reference voltage for the comparator reference voltage (Figure 8-10)
Using a comparator and an programmable gain amplifier (using the programmable gain amplifier output voltage
as the comparator compare voltage input)
• Using the external pin input for the comparator reference voltage (Figure 8-11)
• Using the internal reference voltage for the comparator reference voltage (Figure 8-12)
Using the programmable gain amplifier output voltage as the A/D converter analog input (Figure 8-13)
Remark
Note
In the 78K0R/IB3, only comparator 0 can be used as a comparator by itself. Comparator 1 has no
positive-side input pin, so it can only be used in combination with a programmable gain amplifier.
n = 0 and 1 (78K0R/IB3: n = 0).
CHAPTER 8 COMPARATORS/PROGRAMMABLE GAIN AMPLIFIERS
CnCTL register setting
PER1 register setting
PIM8 register setting
PM8 register setting
Wait (1 μ s or more)
CnOE bit setting
CnEN bit setting
Operation start
Start
User’s Manual U19678EJ1V1UD
Set the PM8 register to the input mode.
Set to the digital input disable
(use port8 as the analog input) state.
Cancel the reset state of the comparator or
programmable gain amplifier and start clock
supply.
Use the CnINV bit of CnCTL to select forwarding
or reversing of the output. Use CnDFS0 to
CnDFS2 to select the noise elimination width.
Enable the comparator operation by setting (1)
the CnEN bit of CnCTL. Input to the positive side
and negative side of the comparator from the
external pin will be enabled at the same time.
Enable the comparator output signal by setting
(1) the CnOE bit of CnCTL.
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