PAC1932SLASH3SLASH4 datasheet(35/62 Pages) MICROCHIP

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DS20005850C-page 35

PAC1932/3/4

6.1

Detailed Register Information

REFRESH COMMAND (ADDRESS 00H)

SEND

No Data in this command, Send Byte only

bit 7

bit 0

Legend:

R = Readable bit

W = Writeable bit

U = Unimplemented bit, read as ‘0’

-n = Value at POR

‘1’ = bit is set

‘0’ = Bit is cleared

x = Bit is unknown

bit 7-0

This command is a SEND Byte, does not contain any data. When it is sent to the device, the REFRESH

command is executed. The accumulator data, accumulator count, VBUS, and VSENSE measurements

are all refreshed and the accumulators are reset. The master can read the accumulator data and

accumulator count anytime 1 ms after the REFRESH command is sent, and anytime after than up until

the next REFRESH command is sent. (The master can read VBUS and VSENSE data in the same time

period. The accumulator results, accumulator count, VBUS and VSENSE data can be refreshed with the

REFRESH_V command without resetting the accumulators, see Register 6-7).

CTRL REGISTER (ADDRESS 01H)

RW-0

R-0

Sample_Rate<1:0>

SLEEP

SING

ALERT_PIN

ALERT_CC

OVF ALERT

OVF

bit 7

bit 0

Legend:

R = Readable bit

W = Writeable bit

U = Unimplemented bit, read as ‘0’

-n = Value at POR

‘1’ = bit is set

‘0’ = Bit is cleared

x = Bit is unknown

bit 7-1

Write to these bits to change settings from default value.

bit 7-6

Sample_Rate<1:0>

: determines sample rate in Normal mode (if SLOW pin is not asserted).

00b

= 1024 samples/s

01b

= 256 samples/s

10b

= 64 samples/s

11b

= 8 samples/s

bit 5

SLEEP

: setting this bit to 1, followed by the REFRESH or REFRESH_V command, puts the device in

SLEEP mode. All programmed, readable, and measured digital data is stable in this mode. Clearing the

SLEEP bit and sending a REFRESH or REFRESH_V command causes the device become active and

start converting in the mode specified by the Control registers (unless the SLOW pin is asserted, in

which case it will start converting at an 8 Hz rate). The SLEEP bit has higher priority than the SING bit

or the SLOW pin, if the SLEEP bit is set the device goes into SLEEP mode not matter how the SING

bit or the SLOW pin are set.

= Active mode

= SLEEP mode, no data conversion

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