MD3331-D64-V3 M-Systems Inc., MD3331-D64-V3 Datasheet - Page 51

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

9.6
9.6.1 Standard Interface
When using a standard interface, up to four DiskOnChip Millennium Plus 16/32MB or up to two DiskOnChip
Millennium Plus 64MB devices can be cascaded, for up to 128MB capacity. No external decoding circuitry or
system redesign is required.
ID[1:0] pin/ball values determine the identity of each device. Systems with only one device must configure it as
device 0 by setting ID[1:0] to 00H. Additional devices should be configured as device 1, device 2 and device 3 by
setting ID[1:0] to 01H, 10H and 11H, respectively.
Note: As DiskOnChip Millennium 64MB is a dual die comprised of two internally stacked DiskOnChip
When devices are cascaded, all I/O pins/balls must be wired in common, including the BUSY# output. The ID input
pins/balls should be strapped to VCC or VSS, according to the location of each device. To communicate with a
particular device, its ID must be written into the Device ID Select register (see Section 7.7). Only the device whose
ID corresponds with this value responds to read or write cycles to registers.
Figure 21 illustrates the configuration required to cascade four devices on the host bus. Only the relevant cascading
signals are included in this figure, although all other signals must also be connected.
9.6.2 Multiplexed Interface
When using a multiplexed interface, up to two DiskOnChip Millennium Plus 16MB devices can be cascaded, for up
to 32MB capacity. No external decoding circuitry or system redesign is required.
ID0 pin/ball value determines the identity of each device. Systems with only one device must configure it as device
0 by connecting ID0 to VSS. The second device should be configured as device 1 by connecting ID0 to VCC.
When two devices are cascaded, all I/O pins/balls must be wired in common, including the BUSY# output. To
communicate with a particular device, its ID must be written into the Device ID Select register (see Section 7.7).
Only the device whose ID corresponds with this value responds to read or write cycles to registers.
51
WE#
OE#
CE#
VSS
VSS
Device Cascading
Millennium plus 32MB devices, only two DiskOnChip Millennium 64MB devices may be cascaded.
ID0
ID1
CE#
OE#
WE#
Figure 21: Cascading Configuration for Four Devices
1st
VCC
VSS
Data Sheet, Rev. 1.7
ID0
ID1
CE#
OE#
WE#
2nd
VSS
VCC
ID0
ID1
CE#
OE#
WE#
DiskOnChip Millennium Plus 16/32/64MByte
3rd
VCC
VCC
ID0
ID1
CE#
OE#
WE#
93-SR-002-03-8L
4th