TransCore IT241005422 Manual De Usuario
Frequently Requested Tag Programming Information
C-7
Perform a read request of owner Page 3 and enter the global password when you are
prompted for it. The read response should return 4 hex characters (16 bits) of data,
each bit corresponding to a general page of data. If the data bit is a logic 1 for the gen-
eral frame in question, then that frame is nonvolatile, and a copy is saved in
EEPROM. For example:
prompted for it. The read response should return 4 hex characters (16 bits) of data,
each bit corresponding to a general page of data. If the data bit is a logic 1 for the gen-
eral frame in question, then that frame is nonvolatile, and a copy is saved in
EEPROM. For example:
The most significant bit (MSB) corresponds to general Page 0, and the least signifi-
cant bit (LSB) corresponds to general Page 15, so for this example Pages 0,1,3, and 5
are nonvolatile.
cant bit (LSB) corresponds to general Page 15, so for this example Pages 0,1,3, and 5
are nonvolatile.
To change the status of the nonvolatile bits, perform a write request to owner area
Page 3 using the global password. Depending on the host program used, the write data
is entered in hexadecimal form. For example, to make only frames 3, 4, and 12 non-
volatile, the write data is entered as 1808 hex. This translates to the following binary
data: 0001 1000 0000 1000.
Page 3 using the global password. Depending on the host program used, the write data
is entered in hexadecimal form. For example, to make only frames 3, 4, and 12 non-
volatile, the write data is entered as 1808 hex. This translates to the following binary
data: 0001 1000 0000 1000.
Note: To preserve factory configuration data and built-in-self-test diagnostic infor-
mation, general Pages 0 and 1 are saved in nonvolatile memory despite the bit set-
tings in owner Page 3.
mation, general Pages 0 and 1 are saved in nonvolatile memory despite the bit set-
tings in owner Page 3.
Locking Frames (Page Locks)
The page lock feature is used to designate general pages as read only. Once a page is
locked, the global password must be used to unlock it before a successful write request
can be processed to change the data in that frame. The page lock bits are stored in
owner area Page 0.
locked, the global password must be used to unlock it before a successful write request
can be processed to change the data in that frame. The page lock bits are stored in
owner area Page 0.
To read the page lock bits, execute a read request of owner Page 0 and enter the global
password when the host program prompts you for it. The read response should return
4 hex characters (16 bits) of data, in which each bit corresponds to a general page of
data. If the data bit is a logic 1 for the general frame in question, then that frame is
locked and is read only. For example:
password when the host program prompts you for it. The read response should return
4 hex characters (16 bits) of data, in which each bit corresponds to a general page of
data. If the data bit is a logic 1 for the general frame in question, then that frame is
locked and is read only. For example:
The MSB corresponds to general Page 0, and the LSB corresponds to general Page 15.
In this example Pages 0,1,7,9, and 10 are locked.
In this example Pages 0,1,7,9, and 10 are locked.
Returned data:
D400
Hexadecimal to binary conversion:
1101 0100 0000 0000
MSB LSB
Returned data:
c160
Hexadecimal to binary conversion:
1100 0001 0110 0000
MSB LSB