PS810 datasheet(22/46 Pages) MICROCHIP

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PS810

DS21904C-page 22

6.2

Configuring Output Functions

Powerful and flexible programming protocols allow

GPIO configured as outputs to be defined with complex

functions based on battery data. Virtually all information

about the battery can be used in a multiple level trigger

function or Reset function. This programming is accom-

plished using Microchip programming development tool,

PowerTool™ 800.

GPIO output functions can be based on the following

information functions:

• All battery data functions, such as voltage,

current, battery status, etc.

• The high or low level of any other GPIO

• The miscellaneous flags byte which contains the

following information:

- bit 0: Charge started

- bit 1: Discharge started

- bit 2: Charge increasing

- bit 3: POR detected

- bit 4: Unused

- bit 5: Wake from Sleep

- bit 6: In Low-Voltage Sleep mode

- bit 7: In Shelf-Sleep mode

- bit 8: In Bus Sleep mode

Once an argument is selected from above, an operator

is selected to compare it to a constant. The operators

are >, <, =, AND and NOR. The latter two are used to

compare individual bits in a bit map. For example, AND

a bit map against the operand 00000000 00000010

will be true if bit one is a ‘1’. NOR a bit map against the

operand 11111111 11111101 will be true if bit one is

a ‘0’.

An example of a condition is :

Voltage < 3200

This condition is true if the battery data of voltage is

less than 3200 mV.

Condition groups can be created by ANDing and ORing

individual conditions together. An example condition

group is:

(Voltage < 3200) AND (Current > 100) OR

(Temperature > 60) AND (Current > 200)

Because of precedence the equation would be

interpreted:

((Voltage < 3200) AND (Current > 100)) OR

((Temperature > 60) AND (Current > 200))

This entire condition group can be programmed to

activate a single GPIO. A Reset condition can then be

assigned to reset the GPIO if it had triggered as a result

of its trigger condition group.

Example Reset condition group:

(Voltage > 3200) OR (Current = 0)

Furthermore, multiple trigger condition groups, each

with their own individual Reset condition groups, can

be assigned to a single GPIO. This is all accomplished

by programming with PowerTool™ 800.

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