QST104 STMicroelectronics, QST104 Datasheet - Page 43

• Manufacturer Part Number: QST104
• Description: Capacitive touch sensor device 4 keys
• Manufacturer: STMicroelectronics

QST104
9
9.1
9.2
9.2.1
Device revision information
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)
Table 34.
The device revision can also be obtained using the GET_DEVICE_INFO I
more information, refer to
Device revision history
This section identifies the device deviations from the present specification for each device
revision.
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).
Device revision identification
Marking
H00
Section 4.9: Supported commands on page
C
F
A
B
a
QRG
J
D
QST104
G
I
H
E
H00
K
Device revision
Device revision information
V 1.0
16.
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2
C command. For
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