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SX8661Z bảng dữ liệu(PDF) 74 Page - Semtech Corporation

tên linh kiện SX8661Z
Giải thích chi tiết về linh kiện  Low Power, Capacitive Button Touch and Proximity Controller with LED Drivers and Analog Output
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nhà sản xuất  SEMTECH [Semtech Corporation]
Trang chủ  http://www.semtech.com
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ADVANCED COMMUNICATIONS & SENSING
DATASHEET
Revision v4.0, February 2016
© 2012 Semtech Corp.
www.semtech.com
74
SX8661Z
Low Power, Capacitive Button Touch and Proximity Controller
(8 sensors) with LED Drivers and Analog Output
6.6.1
SPM Write Sequence
The SPM must always be written in blocks of 8 bytes. The sequence is described below:
1. Set the I2C in SPM mode by writing “01” to SpmCfg[5:4] and SPM write access by writing ‘0’ to SpmCfg[3].
2. Write the SPM base address to SpmBaseAddr (The base address needs to be a value modulo 8).
3. Write the eight consecutive bytes to I2C address 0, 1, 2, …7
4. Terminate by writing “000” to SpmCfg[5:3].
S
SA
0
0x0D
A
0x10
A
P
A
S
: Start condition
SA
: Slave address
A
: Slave acknowledge
BA
: NVM Base Address
WDn
: Write Data byte n, n = 0 to 7
P
: Stop condition
...
From master to slave
From slave to master
S
SA
0
0x0E
A
BA
A
P
A
S
SA
0
0x00
A
WD0
A
P
A
WD7
S
SA
0
0x0D
A
0x00
A
P
A
1)
2)
3)
4)
Figure 56
SPM write sequence
The complete SPM can be written by repeating 16 times the cycles shown in Figure 56 using base addresses
0x00, 0x08, 0x10,…0x70, 0x78.
Once the SPM write sequence is actually applied, the INTB pin will be asserted. The host clears the interrupt by
reading any I2C register. At the same time the bit GenStatMsb[6], indicating the SPM write is done, will be
cleared.



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