MD3331-D64-V3 M-Systems Inc., MD3331-D64-V3 Datasheet - Page 66

• Manufacturer Part Number: MD3331-D64-V3
• Description: Diskonchip Millennium Plus
• Manufacturer: M-Systems Inc.

10.4.5 Power-Up Timing
DiskOnChip Millennium Plus is reset by assertion of the RSTIN# input. When this signal is negated, DiskOnChip
initiates a download procedure from the flash memory into the internal Programmable Boot Block. During this
procedure, DiskOnChip Millennium Plus does not respond to read or write accesses.
Host systems must therefore observe the requirements described below for first access to DiskOnChip Millennium
Plus. Any of the following methods may be employed to guarantee first-access timing requirements:
Host systems that boot from DiskOnChip Millennium Plus must employ option c), or use another method to
guarantee the required timing for first-time access.
66
(Muxed Mode Only)
a.
b. Poll the state of the BUSY# output.
c.
CE#, OE#, WE#
D (Read cycle)
Use a software loop to wait at least Tp (BUSY1) before accessing the device after the reset signal is
negated.
Use the BUSY# output to hold the host CPU in wait state before completing the first access.
A[12:0], BHE#
VCCQ = 1.65 or 2.5V
VCC = 2.5V
RSTIN#
BUSY#
AVD#
VCC
T
P
(VCC-BUSY0)
T
REC
T
HO
(VCC-RSTIN)
(RSTIN-AVD)
Figure 28: Reset Timing
Data Sheet, Rev. 1.7
T
SU
(D-BUSY1)
T
P
(BUSY1)
VALID
T
HO
T
HO
DiskOnChip Millennium Plus 16/32/64MByte
(BUSY-CS)
(BUSY-A)
T
P
(BUSY0)
T
93-SR-002-03-8L
W
(RSTIN)