MD3331-D32-V3Q18 M-Systems Inc., MD3331-D32-V3Q18 Datasheet - Page 24

• Manufacturer Part Number: MD3331-D32-V3Q18
• Description: Mobile Diskonchip Plus 128Mbits 1.8V I/o
• Manufacturer: M-Systems Inc.

5.
Mobile DiskOnChip Plus has three modes of operation:
Mode changes can occur due to any of the following events, as shown in Figure 9:
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Power-Down
Modes of Operation
Reset
Normal
Deep Power-Down
Assertion of the RSTIN# signal sets the device in Reset mode.
During power-up, boot detector circuitry sets the device in Reset mode.
A valid write sequence to Mobile DiskOnChip Plus sets the device in Normal mode. This is done
automatically by the TrueFFS driver on power-up (reset sequence end).
Switching back from Normal mode to Reset mode can be done by a valid write sequence to Mobile
DiskOnChip Plus, or by triggering the boot detector circuitry (by soft reset).
Power-down.
A valid write sequence, initiated by software, sets the device from Normal mode to Deep Power-Down
mode. Four read cycles from offset 0x1FFF set the device back to Normal mode. Alternately, the device
can be set back to Normal mode with an extended access time during a read from the Programmable Boot
Block (see Section 10.4.1 for read cycle timing).
Asserting the RSTIN# signal and holding it in this state while in Normal mode puts the device in Deep
Power-Down mode. When the RSTIN# signal is released, the device is set in Reset mode.
Power Off
Power-Down
Mode
Deep
Power-Down
Assert RSTIN#
Figure 9: Operation Modes and Related Events
Release RSTIN#
4x Read Cycles from
extended read cycle
Data Sheet, Rev. 1.7
Software Control
offset 0x1FFF or
Assert RSTIN#
Power-Down
Power-Up
Software Control
Assert RSTIN#,
Boot Detect or
Mobile DiskOnChip Plus 16/32MByte 1.8V I/O
Normal Mode
Reset Mode
Sequence
Reset
End
95-SR-000-10-8L