MD3331-D64-V3-X SanDisk, MD3331-D64-V3-X Datasheet - Page 52

• Manufacturer Part Number: MD3331-D64-V3-X
• Manufacturer: SanDisk
• Type: Flash Diskr

Specifications of MD3331-D64-V3-X

• Density: 64MByte
• Operating Supply Voltage (typ): 3.3V
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Package Type: FBGA
• Mounting: Surface Mount
• Pin Count: 69
• Operating Temperature Classification: Industrial
• Operating Supply Voltage (min): 2.5V
• Operating Supply Voltage (max): 3.6V
• Programmable: Yes
• Lead Free Status / Rohs Status: Not Compliant

Figure 17 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
When using a multiplexed interface, up to two Mobile DiskOnChip Plus 16MB devices can be
cascaded, for up to 32MB capacity. No external decoding circuitry or system redesign is required.
The ID0 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 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.
Note: Mobile DiskOnChip Plus 32MB devices cannot be cascaded in a multiplexed interface.
9.6.3
When cascading Mobile DiskOnChip Plus devices, the Programmable Boot Block size is enlarged
by 1KB for each additional 16MB device in the configuration. When four 16MB devices (or two
32MB devices) are connected in a cascaded configuration, a boot block size of 4KB is available.
The MAX_ID field of the Configuration register can be programmed with the maximum ID value
used to enable access to the boot block of each device in a separate address space.
Initially at power-up, only device 0 responds to reads from the boot block address space with its
1KB of data aliased at addresses 0K, 1K, 6K and 7K. Figure 18 shows the memory map when the
maximum number of devices are connected in a cascaded configuration, and the location of each
IPL.
52
WE#
CE#
OE#
VSS
VSS
Multiplexed Interface
Memory Map in a Cascaded Configuration
ID0
ID1
CE#
OE#
WE#
Figure 17: Cascading Configuration for Four Devices
1st
VCC
VSS
Data Sheet, Rev. 1.8
ID0
ID1
CE#
OE#
WE#
2nd
VSS
VCC
ID0
ID1
CE#
OE#
WE#
3rd
VCC
VCC
Mobile DiskOnChip Plus 16/32MByte
ID0
ID1
CE#
OE#
WE#
95-SR-000-10-8L
4th