TB62709F Ver la hoja de datos (PDF) - Marktech Optoelectronics
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TB62709F Datasheet PDF : 24 Pages
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TOSHIBA Bi-CMOS Integrated
Circuit Silicon Monolithic
TB62709N/F
Data Decode
The TB62709F utilizes two basic modes of operation. In the DECODE MODE, data encoded in
data bits D7~D0 is decoded to display preset characters per table 8. This mode is activated as
illustrated in table 5. With D15~D8 programmed as 21 Hex and D7~D4 as 1 Hex the DECODE
MODE is selected.
In the DIRECT DRIVE MODE the ability to decode data to preset characters for display is
bypassed giving the programmer direct control of the 8 constant current sink outputs. This mode
may be used to drive discrete LEDs or to display characters not included in the character set.
FUNCTION
Direct Drive
Decode
REGISTER DATA
D15~D8 D7 D6 D5 D4 D3~D0 Hex Code
21H
00 00
X
210XH
21H
00 0 1
X
211XH
INITIAL
STATE
⇐
“x” indicates that data is required in this field to execute the function. “-” indicates that data in
this field is not required and not recognized.
This programming step is performed simultaneously with the DIGIT SELECTION decision (table
4) which utilizes D3~D0.The initial state, upon power up, is the DECODE mode.
Table below illustrates the input / output relationship in the DIRECT DRIVE mode. A Logic 1
data state turns the respective output on and a Logic 0 data state turns the respective output off.
REGISTER DATA
D0
D1
D2
D3
D4
D5
D6
D7
OUTPUT
Out-a
Out-b
Out-c
Out-d
Out-e
Out-f
Out-g
Out-DP
INITIAL STATE
L
L
L
L
L
L
L
L
NOTE
H Data is
output ON (1)
and
L Data is
output OFF (0)
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optoelectronics
120 Broadway • Menands, New York 12204
Toll Free: (800) 98-4LEDS • Fax: (518) 432-7454
For up-to-date product info visit our web site at www.marktechopto.com
All specifications subject to change.
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