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13.3 Pins of the Comparator
13.3 Pins of the Comparator
This section describes the pins associated with the comparator. It also shows a block
diagram of pins.
I
Pins Associated with the Comparator
The Pins associated with the comparator are as follows:
P50/ALR1, P51/ALR2, P52/ALR3, P53/ACO, P54/OFB1, P55/OFB2, P56/OFB3, P70/DCIN,
P71/DCIN2, P72/VOL1, P73/VSI1, P74/VOL2, P75/VSI2, P76/VOL3, P77/VSI3, P85/AN0/SW1,
P86/AN1/SW2, P87/AN2/SW3, CVRH1, CVRH2, CVRL.
Each of these pins acts as a general-purpose port or a comparator.
P50/ALR1 to P52/ALR3:
Each of these pins acts as a general-purpose I/O port (P50 to P52) or as an alarm signal
output pin (ALR1 to ALR3) used when the battery charge is running low.
P53/ACO:
This pin acts as a general-purpose I/O port (P53) or as an output pin (ACO) used when ON/
OFF of the comparator AC adapter power supply is detected.
P54/OFB1 to P56/OFB3:
Each of these pins acts as a general-purpose I/O port (P54 to P56) or as a battery discharge
control signal output pin (OFB1 to OFB3). For "OFB1 to 3" output, discharge is allowed by
"L".
P85/AN0/SW1 to P87/AN2/SW3:
Each of theses pins acts as a general-purpose I/O port (P85 to P87), as an input pin (SW1 to
SW3) for the detection of the comparator voltage mount/dismount, or as an A/D input pin.
P70/DCIN:
This pin acts as a general-purpose I/O port (P70) or as an input pin (DCIN) for the detection
of mount/dismount of the comparator AC adapter power supply.
P71/DCIN2:
Each of these pins acts as a general-purpose I/O port (P71) or as an input pin (DCIN2) for
the detection of mount/dismount of the comparator AC adapter power supply.
P72/VOL1, P74/VOL2, P76/VOL3:
Each of these pins acts as a general-purpose I/O port (P72, P74, P76) or as an input pin
(VOL1, VOL2, VOL3) for the detection of battery intermittence.
P73/VSI1, P75/VSI2, P77/VSI3:
Each of these pins acts as a general-purpose I/O port (P73, P75, P77) or as an input pin
(VSI1, VSI2, VSI3) for comparator battery remainder monitoring.
CVRH1, CVRH2, CVRL:
These pins are used as the reference power supply pins for voltage comparators of the
comparator. Hysteresis characteristics can be attached during voltage comparison,
depending on the input voltage level.