 2002 Microchip Technology Inc.

DS40237A-page 3

PS042

2.2

Jumpers

• ADR – jumper for board address identification

O – open, X – connect

• COM and RX – jumpers to select RS-232 or

RS-485

3.0

FUNCTIONAL DESCRIPTION

With the current firmware, the PowerCal board can

perform programming and test of packs and modules

and the calibration of pack and cell voltages on packs.

Apply power (24V DC) to the board at either the JP

connector using an A/C wall adapter or at TBP

connector. To use a single PowerCal board connected

to the serial port of a PC, configure the COM and RX

jumpers for RS-232 and connect the P1 connector to

the PC serial port. To use multiple boards per COM

port, configure the COM and RX jumpers for RS-485

and connect the P1 connector to the RS-485 connector

on the PC card. Additional PowerCal boards my be

added by connecting J1 on the first board to P1 on the

next using a standard (straight-through) PC serial

cable. Up to seven boards may be added in this

manner. Use the ADR jumper to give each board a

unique address. Install and run Microchip’s PowerTool

software on the PC. The calibration platform is ready to

use.

3.1

Pack Programming, Calibration

and Test

Attach the external pack contacts of the Microchip

SmartBattery pack (V+, C, D, T, V-) to the same

terminals on the TBB connector. Using PowerTool

software, the EEPROM can be programmed and the

pack voltage can be calibrated. To program OTP

connection is only necessary for OTP programming.

Additional PowerTool features, such as final test, can

also be performed on the pack.

3.2

Additional connections to the TBB connector are

necessary for the calibration of individual cell voltages.

top of the cell stack is connected to V1, and the

intermediate cell connections are made from the top-

down. In other words, V2 is connected to the next cell

below V1, V3 below V2, and V4 below V3. For 3-cell

packs, do not connect V4. For 2-cell packs – do not

connect V3 and V4. PowerTool software is used to

calibrate the cell voltages.

Jumper Position

Address

3-4

2-5

1-6

0

XXX

1X

X

O

2X

O

X

3X

O

O

4O

X

X

5O

X

O

6O

O

X

7

OOO

1

2

3

6

5

4

1

2

3

COM

RX

RS-232

1

2

3

6

5

4

1

2

3

COM

RX

RS-485

Jumper Symbol