DOCUMENT
NO.
REV.NO
PAGE
STANDARD
NAME
SPECIFICATION FOR APPROVAL
00 8/10
The duty cycle control byte contains a five bit numeric field (bits 4 to 0) that allows
the ‘on’ time for all digits to be modified. Luminance levels are available in 1/32 or
3.1% steps. A value of 31 represents maximum luminance, while a value of 0 places
the output drivers into the “off” state and blanks the display.
For example, a binary value of 24 would force the display’s luminance level to be
77% of maximum luminance, and the full 8-bit byte would be:
1 1 1 1 1 0 0 0
Timing data.
Duty cycle control command.
Control data byte identifier.
4.2 WRITING CHARACTER DATA BYTES
8-BIT DATA BYTE
FUNCTION
0 X Z Z Z Z Z Z
Character Data Byte
NOTES:
1. “X” - don’t care
2. “ZZZZZZ” - 6 bit character address from the character table
Character data bytes are loaded into the data buffer as 8 bit bytes, with the C-bit (bit
7) set to 0. The 64 available data bytes are shown in Figure 6, with their
corresponding ASCII characters.
The display buffer pointer is automatically
incremented before each character data
byte is stored. Decimal points and commas will not cause the buffer pointer to
increment, and are therefore always associated with the character data byte
previously entered. If it is desirable to place characters out of sequence, that is not
from position 1 to 16, then each character data byte must be preceded by the
appropriate positional data through the use of the buffer pointer control byte.
4.3 POWER-ON RESET
Once Vcc has stabilized after power up, a 100us active low pulse must be applied to
the RESET\ input to initialize the module. The following conditions are established
after a RESET\ pulse has been applied.
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