sx8636 Semtech Corporation, sx8636 Datasheet - Page 61

• Manufacturer Part Number: sx8636
• Description: Low Power, Capacitive Button Touch Controller 8 Sensors With Enhanced Led Drivers And Proximity Sensing
• Manufacturer: Semtech Corporation

ADVANCED COMMUNICATIONS & SENSING
6.6 SPM Gateway Registers
The SX8636 I2C interface offers two registers for exchanging the SPM data with the host.
• SpmCfg
• SpmBaseAddr
The exchange of data, read and write, between the host and the SPM is always done in bursts of eight bytes.
The base address of each burst of eight bytes is a modulo 8 number, starting at 0x00 and ending at 0x78.
The registers SpmKeyMsb and SpmKeyLsb are required for NVM programming as described in section 6.7.
Revision 7_5, September 10
Address
Address Name
Address
Address Name
0x0E
0xAC
0xAD
0x0D
SpmBaseAddr
SpmKeyMsb
Name
SpmKeyLsb
Name
SpmCfg
Bits
7:6
5:4
3
2:0
Bits
7:0
Bits
7:0
Bits
7:0
Table 33
Description
00: Reserved
Enables I2C SPM mode
00: OFF (default)
01: ON
10: Reserved
11: Reserved
Defines r/w direction of SPM
0: SPM write access (default)
1: SPM read access
000: Reserved
Description
SPM to NVM burn Key MSB
Description
SPM to NVM burn Key LSB
Table 34 SPM Base Address
© 2010 Semtech Corp.
Low Power, Capacitive Button Touch Controller (8 sensors)
Table 35
Table 36
Description
SPM Base Address (modulo 8).
The lowest address is 0x00 (default).
The highest address is 0x78.
SPM access configuration
SPM Key MSB
SPM Key LSB
with Enhanced LED Drivers and Proximity Sensing
61
Unlock requires writing data: 0x62
Unlock requires writing data: 0x9D
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SX8636