TB62709FG データシートの表示（PDF） - Toshiba
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TB62709FG Datasheet PDF : 29 Pages
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TB62709NG/FG
DIGIT SETTINGS
Setting the number of digits (Table 4)
Writing 21H to D15~D8 and at the same step writing 0H~3H to D3~D0 sets the number of digits to a maximum
of four the display. The initial setting is four digits, and four will also be set by a Data Clear.
The current settings continue until changed (by reset execution, or to the initial state, Data Clear state, or
standby state).
When changing the number of digits, also set D7 to D4.
ACTIVATED DIG−−0 ONLY
ACTIVATED DIG−−0~1
ACTIVATED DIG−−0~2
ACTIVATED DIG−−0~3
D15~D8
21H
21H
21H
21H
X = Input H or L.
Table 4 Digit settings
D7~D4
X
X
X
X
REGISTER DATA
D3
D2
D1
0
0
0
0
0
0
0
0
1
0
0
1
INITIAL
D0
HEX CODE SETTING
0
21X0H
1
21X1H
0
21X2H
1
21X3H
■
DECODE SETTINGS
Decode settings (Table 5)
The settings for Decode are the same as the settings for the number of digits, described under setting, above.
Writing 21H to D15~D8 and writing 0~1H to D7~D4 set Decode mode.
When using this IC for controlling the lighting on individual LEDs used for a dot matrix rather than a
7−segment display, set to No Decode.
As Table 6 shows, D0 in the data register is used to turn OUT−a ON and OFF ; D1 turns OUT−b ON and OFF.
The initial setting is Decode mode, and Decode mode will also be set by a Data Clear.
The current settings continue until changed (by reset execution, or to the initial state, Data Clear state, or
standby state).
Since D3 to D0 are also used for setting the number of digits, when changing the Decode setting, also set D3 to
D0.
Table 5 Decode settings
D15~D8
D7
PASS DECODER (NO DECODE) 21H
0
DECODE
21H
0
REGISTER DATA
D6
D5
D4
0
0
0
0
0
1
X = Input H or L.
D3~D0
X
X
HEX CODE
210XH
211XH
INITIAL
SETTING
■
9
2006-06-14
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