TB62709 Toshiba, TB62709 Datasheet - Page 10

• Manufacturer Part Number: TB62709
• Description: 7-SEGMENT DRIVERS WITH BUILT-IN DECODERS
• Manufacturer: Toshiba

TB62709N/F
TB62709N/F
TB62709N/F
TB62709N/F
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.
“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.
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FUNCTION
Direct Drive
Decode
TOSHIBA Bi-CMOS Integrated
Circuit Silicon Monolithic
REGISTER DATA
D15~D8
D0
D2
D3
D4
D5
D6
D7
D1
21H
21H
D7
0
0
D6
0
0
OUTPUT
REGISTER DATA
Out-DP
Out-a
Out-b
Out-d
Out-e
Out-g
Out-c
Out-f
D5
0
0
D4
0
1
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INITIAL STATE
D3~D0
X
X
L
L
L
L
L
L
L
L
120 Broadway • Menands, New York 12204
Hex Code
210XH
211XH
output OFF (0)
output ON (1)
H Data is
L Data is
NOTE
and
INITIAL
STATE
All specifications subject to change.
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