SST SST-ASI-SLC, Руководство пользователя

Страница: 27 / 74

Theory of Operation
21
4.6 AS-i Modes
AS-i has 2 operating modes, Configuration and Protected. Normally, the
system is in Protected mode. You enter Configuration mode only if you are
configuring via the serial port. The following sections describe each mode.
4.6.1 Configuration Mode
You can:
• change slave addresses
• save to EEPROM
You cannot:
• perform data exchange
• use Auto Address Programming
All slaves are active regardless of the LPS. In other words, the LDS and the
LAS are the same. Refer to section 4.5 for more information on LPS, LDS
and LAS.
4.6.2 Protected Mode
You can:
• exchange data
• use Auto Address Programming (if enabled)
You cannot:
• write to EEPROM
• enter protected mode with slave 0 (zero) present
• change slave addresses
Only slaves which are present in the EEPROM (LPS) and match the ID and
I/O codes in the LPS are activated.