PS501 datasheet(4/42 Pages) MICROCHIP

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PS501

DS21818C-page 4

 2004 Microchip Technology Inc.

TABLE 1-1:

PIN DESCRIPTIONS

Name

Description

1VDDD

(Input) Filter capacitor input for digital supply voltage.

GPIO(4)

(Bidirectional) Programmable general purpose digital input/output pin (4) or LED driver.

GPIO(5)

(Bidirectional) Programmable general purpose digital input/output pin (5) or LED driver.

GPIO(6)

(Bidirectional) Programmable general purpose digital input/output pin (6) or LED driver.

GPIO(7)

(Bidirectional) Programmable general purpose digital input/output pin (7) or LED driver.

SMB-CLK

SMBus clock pin connection.

SMB-DTA

SMBus data pin connection.

VC(4)

(Input) Cell voltage input for the fourth highest voltage cell in a series string.

VC(3)

(Input) Cell voltage input for the third highest voltage cell in a series string.

VC(2)

(Input) Cell voltage input for the second highest voltage cell in a series string.

VC(1)

(Input) Cell voltage input for the first or highest voltage cell in a series string.

VDDA

(Input) Analog supply voltage input.

VSSA

Analog ground reference point.

RSHP

(Input) Current measurement A/D input from positive side of the current sense resistor.

RSHN

(Input) Current measurement A/D input from negative side of the current sense resistor.

VNTC

(Input) A/D input for use with an external temperature circuit. This is the midpoint

connection of a voltage divider, where the upper leg is a thermistor (103ETB type) and the

lower leg is a 3.65 KOhm resistor. This input should not go above 150 mV.

VREFT

(Output) Reference voltage output for use with temperature measuring A/D circuit. This

150 mV output is the top leg of the voltage divider and connects to an external thermistor.

ROSC

External bias resistor.

GPIO(8)

(Bidirectional) Programmable general purpose digital input/output pin (8).

GPIO(9)

(Bidirectional) Programmable general purpose digital input/output pin (9).

GPIOHV1

(Bidirectional) Programmable general purpose digital input/output pin (10). Open-drain,

high-voltage tolerant.

MCLR

(Input) Master Clear. Must be pulled up for normal operation.

GPIOHV2

(Bidirectional) Programmable general purpose digital input/output pin (12). Open-drain,

high-voltage tolerant.

GPIO(0)

(Bidirectional) Programmable general purpose digital input/output pin (0) or LED driver.

GPIO(1)

(Bidirectional) Programmable general purpose digital input/output pin (1) or LED driver.

GPIO(2)

(Bidirectional) Programmable general purpose digital input/output pin (2) or LED driver.

GPIO(3)

(Bidirectional) Programmable general purpose digital input/output pin (3) or LED driver.

VSSD

Digital ground reference point.

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