Fujitsu MHY2120BH User Manual

Page of 322
Operations
 
6-12 
C141-E262 
(3) Slumber mode 
In this mode, the (deep) Power Save mode is set for the interface circuit. 
The device switches to Slumber mode when the following occurs: 
• 
The device receives the PMREQ_P signal from the host and responds with 
the PMACK signal. 
• 
The device sends the PMREQ_S signal and the host responds with PMACK 
signal. 
The device cannot switch to Slumber mode if the following condition is satisfied: 
• 
The device responds with the PMNAK signal because it is not waiting for 
commands. 
The device returns to Active mode from Slumber mode when the following 
condition is satisfied: 
• 
The device receives the COMRESET or ComWake signal from the host.