MD4331-d1G-MECH M-Systems Inc., MD4331-d1G-MECH Datasheet - Page 46

• Manufacturer Part Number: MD4331-d1G-MECH
• Description: Mobile Diskonchip G3 Data Sheet
• Manufacturer: M-Systems Inc.

6.
Mobile DiskOnChip G3 operates in one of three basic modes:
•
•
•
The current mode of the chip can always be determined by reading the DiskOnChip Control
register. Mode changes can occur due to any of the following events:
•
•
•
•
•
•
•
•
43
Normal mode
Reset mode
Deep Power-Down mode
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 G3 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 G3, or by triggering the boot detector circuitry (via a soft reset).
Deep 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.
Asserting the RSTIN# signal and holding it in this state while in Normal mode puts the device
in Deep Power-Down mode. When RSTIN# is released, the device is set in Reset mode.
Toggling the DPD signal as defined by the DPD Control register.
M
ODES OF
Power-Down
Power Off
Power-Down
O
PERATION
Mode
Deep
Figure 17: Operation Modes and Related Events
Power-Down
Assert RSTIN#
Release RSTIN#
Data Sheet, Rev. 1.0
4x Read Cycles from
extended read cycle
Software Control
offset 0x1FFF or
Assert RSTIN#
Power-Down
Power-Up
Software Control
Assert RSTIN#,
Boot Detect or
Normal Mode
Reset Mode
Sequence
Reset
End
Mobile DiskOnChip G3
91-SR-011-05-8L