QST104 datasheet(43/45 Pages) STMICROELECTRONICS

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QST104

Device revision information

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Device revision information

9.1

Device revision identification

The marking on the right side of the second line (Line B) of the package top face identifies

the device revision.

Figure 22.

Device revision identification (TQFP package)

The device revision can also be obtained using the GET_DEVICE_INFO I2C command. For

more information, refer to Section 4.9: Supported commands on page 16.

9.2

Device revision history

This section identifies the device deviations from the present specification for each device

revision.

9.2.1

Revision 1.0

When the device enters low power mode, an additional sleep time is inserted after each

burst, instead of once after every complete burst cycle. As a result, if only one burst is

required, the sleep duration during low power mode is doubled. And if two bursts are

required, the sleep duration is tripled.

In standalone mode, the 100ms sleep duration low power becomes either a 200ms or

300ms sleep duration depending on the number of bursts required.

In I2C mode, it is required to program a sleep duration for one half or a third of the desired

sleep duration depending on the number of bursts required.

GET_PROTOCOL_VERSION returns 0x01 as I2CSpeed byte while it should return 0x00

(maximum speed is 100 kHz).

Table 34.

Device revision identification

Marking

Device revision

H00

V 1.0

QST104

QRG

H00

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