Programmers Guide
TH320/420
100
0x1B0x730x840x4732
0x1B0x730x820x2433
0x1B0x730x000x0034.
Maintaining the exception table
Present contents of the exception table can be examined using the read NVRAM command:
0x1B 0x6A k
This command reads and returns word k in NVRAM. When the exception table is full, a new entry can
replace an older, less frequently used entry, by merely rewriting the words for that table entry.
User data storage
Write to user data storage
ASCII
ESC ‘ m a0 a 1 a2 d 1
... dm
Hexadecimal
1B 27 m a0 a 1 a2 d 1
... dm
Decimal
27 39 m a0 a 1 a2 d 1
... dm
Value of m:
0 – 255
Writes m bytes of data to the user data storage flash page at the address specified. The printer waits for
m
bytes of data following the 3-byte address,
addr.
If any of the memory locations addressed by this command are not currently erased, the command is not
executed.
The printer disables interrupts while writing to flash. Any command that cause data to be written to flash
should be followed by a 50 Msec delay to allow significant time for the write operation.
Read from user data storage
ASCII
ESC 4 m a0 a 1 a2
Hexadecimal
1B 34 m a0 a 1 a2
Decimal
27 52 m a0 a 1 a2
Value of m
0 – 255
Reads
m
bytes of data from the user data storage flash page at the address specified. Returns
m
bytes to the application, followed by a carriage return (0Dh).
The high order byte of the address (a0) ranges from 0 to
n
2–1, with
n
2 specified in the flash allocation
command. If the flash allocation command has been used, the a0 = 0 always.
Read from non-volatile memory
ASCII
ESC j k
Hexadecimal 1B 6A k
Decimal
27 106 k
Range of k
20 – 63 (decimal)
Summary of Contents for TH320
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Page 142: ...Programmers Guide TH320 420 134 TH420 Additional Features ...
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