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Pin Descriptions
2-2
2.1
Pin Descriptions
P1
HDQ/Serial communications port
P2
NC/No connect
P3
BAT+/Battery positive/pack positive
P4
NC/No connect
P5
RBI/Register backup input
P6
GND/Ground
P7
PACK–/Pack negative
P8
BAT–/Battery negative
2.2
Programming
The DM2014H circuit module is preconfigured for battery-pack chemistry,
voltage, and pack capacity. The circuit module can be reprogrammed for pack
chemistry, voltage, capacity, and other operating parameters via the
programming resistors on the board. The resistors set the programming pins
to a high (H), low (L), or float (Z) state on initialization. A high (H) state for a
programming pin requires the pullup resistor, a low (L) state requires the
pulldown resistor, and the float (Z) requires no resistors on the programming
pin. The shaded area of the tables indicates the bq2014HEVM-001
configuration. See the bq2014H data sheet for a complete description of how
the bq2014H is programmed.
2.2.1
Full Capacity
Pins 2–5 of the bq2014H determine the full capacity or programmed full count
(PFC) of the DM2014H. Resistors R12–R15 and R17–20 set the pins to a high
(H), low (L), or float (Z) state during board initialization.
Table 2–1. Full Capacity Programming
PFC Input Settings
Pin 4
Pin 5
Sense Resistor m
Ω
Capacity (mAh)
H
Z
50
1300
Z
Z
50
650
L
L
50
2600
2.2.2
Self-Discharge Settings for Chemistry
Battery chemistries have different self-discharge rates. Pin 6 of the bq2014H
determines the self-discharge factors of the DM2014H. Resistors R23 and
R24 set the pin to a high (H), low (L), or float (Z) state during board initialization.
Summary of Contents for bq2014HEVM-001
Page 1: ... May 2001 Advanced Analog Products User s Guide SLUU105 ...
Page 10: ...2 4 ...
Page 18: ...6 2 ...
Page 22: ...7 4 ...