Chapter 8: EEPROM Specifications
Common EEPROM Fields
118
Psion Teklogix Omnii HDK User Manual
•
Mfg. Test Region
– This area is provided to allow manufacturing test of the module
EEPROM. The contents are not used for any other purpose. This is reserved for the original
board manufacturer.
•
Part Number
– This field will be displayed to the user in the System Properties panel of the
System applet in the Windows Control Panel. If the ASCII string is less than 16 bytes, it must
be null-terminated.
For OEM expansion modules, this field may be any format.
For Psion Teklogix modules, this field will use the 12-digit Psion Teklogix part
number format.
•
Serial Number
– This field will be displayed to the user in the System Properties panel of the
System applet in the Windows Control Panel. If the ASCII string is less than 16 bytes, it must
be null-terminated.
For OEM expansion modules, this field may be any format.
For Psion Teklogix modules, this field will use the 14-digit Psion Teklogix serial
number format.
•
Manufacturer and Model
– These two fields together uniquely define the module hardware.
These fields will be displayed to the user in the System Properties panel of the System applet
in the Control Panel. They will also define the registry key of the software driver to be loaded
(if applicable).
The character set is restricted to alphanumeric characters plus the space character, as these
strings will be used as part of a WinCE registry key. If the ASCII string for either field is less
than 20 bytes, it must be null-terminated.
Table 8.1 Common EEPROM Fields
Field
Number
Field Name
Address
Size
Contents
1
Mfg. Test Region
0-9
10 bytes
Any. (Contents ignored by online software.)
2
Part Number
10-25
16 bytes
ASCII text.
3
Serial Number
26-41
16 bytes
ASCII text.
4
Manufacturer
42-61
20 bytes
ASCII text. Character set is restricted to
alphanumeric plus space and null.
5
Model
62-81
20 bytes
ASCII text. Character set is restricted to
alphanumeric plus space and null.
6
Hardware Revision
82-85
4 bytes
ASCII text.
7
EEPROM Size
86
1 byte
Binary data;
Size = value of this field * 128 + 128. ie:
0x00 = 128 bytes
0x01 = 256 bytes
0x03 = 512 bytes, etc.
(Exception: default value 0xFF returns 128 bytes).
8
Reserved
87-89
3 bytes
All 0xFF until defined.
9+
Module Specific
Parameters
90+
(variable) Module dependent.
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