Intel 537EX - Manual (Page 89)

536EX Chipset Developer’s Manual 89
Intel Confidential
S-Registers
S33 10
Sleep Mode Timer: S33 determines when the modem enters sleep or power-down mode.
When enabled (S33
≠ 0), the controller enters sleep mode whenever the modem has been
inactive for a user-programmable time delay (S33). The modem is considered to be in an
inactive state when:
• No internal processing is being performed;
• No activity occurs between the host and the modem within a
specified time period;
• The modem is off-line.
The modem exits sleep mode whenever the host reads or writes to the
modem or when a ring signal is detected.
Sleep mode is disabled by setting S33 to ‘0’.
Range: 0–90 seconds
Table 26. S-Register Command Descriptions (Continued)
Command Default Description
NOTE: An asterisk (*) denotes the factory-default setting.