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Epson Research and Development
Page 75
Vancouver Design Center
Hardware Functional Specification S1D13505
Issue Date: 01/02/02 X23A-A-001-14
7.4.2 Power Save Status
Figure 7-23: Power Save Status and Local Bus Memory Access Relative to Power Save Mode
Note
Power Save can be initiated through either the SUSPEND# pin or Software Suspend Enable Bit.
Note
It is recommended that memory access not be performed after a Power Save Mode has been
initiated.
Table 7-22: Power Save Status and Local Bus Memory Access Relative to Power Save Mode
Symbol Parameter Min Max Units
t1
Power Save initiated to rising edge of Power Save Status and the
last time memory access by the local bus may be performed.
129 130 Frames
t2
Power Save deactivated to falling edge of Power Save Status
12 MCLK
t3
Falling edge of Power Save Status to the earliest time the local bus
may perform a memory access
8MCLK
Power Save
t1
Power Save Status Bit
Memory Access
not allowed allowed
t2
t3
allowed