STMPE321 ST Microelectronics, STMPE321 Datasheet - Page 11

• Manufacturer Part Number: STMPE321
• Description: 3-channel capacitive touch key controller
• Manufacturer: ST Microelectronics

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STMPE321
Table 4.
Figure 6.
More than one byte
More than one byte
Mode
Read
Write
One byte
One byte
Read
Read
Read
Write
Operation modes
Read and write modes (random and sequential)
Byte
Address
Address
Address
Address
Master
Slave
Device
Device
Device
Device
≥1
≥1
Start, Device address, R/W = 0, Register address to be read
Restart, Device address, R/W = 1, Data Read, STOP
If no Stop is issued, the Data Read can be continuously performed. If
the register address falls within the range that allows an address auto-
increment, then the register address auto-increments internally after
every byte of data being read. For those register addresses that fall
within a non-incremental address range, the address is kept static
throughout the entire write operations. Refer to the memory map table
for the address ranges that are auto and non-increment. An example
of such a non-increment address is FIFO.
Start, Device address, R/W = 0, Register address to be written, Data
Write, Stop
If no Stop is issued, the Data Write can be continuously performed. If
the register address falls within the range that allows address auto-
increment, then the register address auto-increments internally after
every byte of data being written in. For those register addresses that
fall within a non-incremental address range, the address is kept static
throughout the entire write operations. Refer to the memory map table
for the address ranges that are auto and non-increment.
Doc ID 15791 Rev 1
Address
Address
Address
Address
Reg
Reg
Reg
Reg
Data to
written
Write
to be
Data
Address
Address
Device
Device
Programming sequence
Write + 1
Data to
Read
Read
Data
Data
Write + 2
Data to
Read + 1
Data
Read + 2
I2C interface
Data
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