MD2241-D128-V3 M-Systems Inc., MD2241-D128-V3 Datasheet - Page 25

• Manufacturer Part Number: MD2241-D128-V3
• Description: Diskonchip Dimm Plus
• Manufacturer: M-Systems Inc.

7.
This section describes various DiskOnChip DIMM Plus registers and their functions, as listed in Table 2. This
section can be used to enable the designer to better evaluate DiskOnChip technology.
7.1
The following abbreviations and terms are used within this section:
RFU
RFU_0
RFU_1
Reset Value Refers to the value immediately present after exiting from Reset mode to Normal mode.
7.2
All registers return the value 00H while in Reset mode. The Reset value that is written in the register description is
the register value after exiting from Reset mode and entering Normal mode. Please note that the contents of some
registers are undefined at that time (N/A).
7.3
Description:
Address (hex):
Type:
Reset Value:
7.4
Description:
Address (hex):
Type:
Reset Value:
25
Bit 7
Register Descriptions
Definition of Terms
Reset Values
Chip Identification (ID) Register
No Operation (NOP) Register
Reserved for future use. This bit is undefined during a read cycle and “don’t care” during a write cycle.
Reserved for future use; when read, this bit always returns the value 0; when written, software should
ensure that this bit is always set to 0.
Reserved for future use; when read, this bit always returns the value 1; when written, software should
ensure that this bit is always set to 1.
A call to this register results in no operation. To aid in code readability and documentation, it is
None
This register is used to identify the device residing on the host platform. This register always
returns the value 40H when read.
1000
Read only
40H
recommended that software access this register when performing cycles intended to create a time
delay.
1002
Write
Bit 6
Address (Hex)
Bit 5
1000
1002
1004
1006
1046
1076
Table 2: DiskOnChip DIMM Plus Registers
Preliminary Data Sheet, Rev. 1.2
Bit 4
Chip Identification (ID)
No Operation (NOP)
Alias Resolution
DiskOnChip Control
Toggle Bit
DiskOnChip Control Confirmation
40H
Register Name
Bit 3
Bit 2
Bit 1
DiskOnChip DIMM Plus
94-SR-002-08-8L
Bit 0