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ATMEGA16HVB Datasheet(PDF) 3 Page - ATMEL Corporation

Part No. ATMEGA16HVB
Description  8-bit Microcontroller with 16K/32K Bytes In-System Programmable Flash
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Maker  ATMEL [ATMEL Corporation]
Homepage  http://www.atmel.com
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 3 page
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3
8042AS–AVR–09/08
ATmega16HVB/32HVB
1.2.4
VREF
Internal Voltage Reference for external decoupling. For details, see ”Voltage Reference and
Temperature Sensor” on page 124.
1.2.5
VREFGND
Ground for decoupling of Internal Voltage Reference. For details, see ”Voltage Reference and
Temperature Sensor” on page 124. Do not connect to GND or SGND on PCB.
1.2.6
GND
Ground
1.2.7
Port A (PA3..PA0)
Port A serves as a low-voltage 4-bit bi-directional I/O port with internal pull-up resistors (selected
for each bit). As inputs, Port A pins that are externally pulled low will source current if the pull-up
resistors are activated. The Port A pins are tri-stated when a reset condition becomes active,
even if the clock is not running.
Port A also serves the functions of various special features of the ATmega16HVB/32HVB as
listed in ”Alternate Functions of Port A” on page 76.
1.2.8
Port B (PB7..PB0)
Port B is a low-voltage 8-bit bi-directional I/O port with internal pull-up resistors (selected for
each bit). As inputs, Port B pins that are externally pulled low will source current if the pull-up
resistors are activated. The Port B pins are tri-stated when a reset condition becomes active,
even if the clock is not running.
Port B also serves the functions of various special features of the ATmega16HVB/32HVB as
listed in ”Alternate Functions of Port B” on page 77.
1.2.9
Port C (PC5)
Port C (PC5) is a high voltage Open Drain output port. Port C serves the functions of various
special features of the ATmega16HVB/32HVB as listed in ”Alternate Functions of Port C” on
page 67.
1.2.10
Port C (PC4..PC0)
Port C is a 5-bit high voltage Open Drain bi-directional I/O port. Port C serves the functions of
various special features of the ATmega16HVB/32HVB as listed in ”Alternate Functions of Port
C” on page 67.
1.2.11
OC/OD
High voltage output to drive Charge/Discharge. For details, see ”FET Driver” on page 147.
1.2.12
PI/NI
Filtered positive/negative input from external current sense resistor, used to by the Coulomb
Counter ADC to measure charge/discharge currents flowing in the battery pack. For details, see
”Coulomb Counter - Dedicated Fuel Gauging Sigma-delta ADC” on page 110.




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