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TB62709FG

TOSHIBA Bi−CMOS INTEGRATED CIRCUIT SILICON MONOLITHIC

Toshiba 

TB62709NG/FG

Operating modes (Table 1.)

These ICs support the following five operating modes :

1. Blank

: Forcibly turns OFF the constant−current output both for data and for digit setting. This

mode is not affected by the values in bits D11 to D0.

2. Normal Operate : Used for display operations after the settings of the digits are complete. Note that setting

this mode without making any other settings will cause display of the numeral 0.

3. Load Register

: Used for the detail settings of the Duty Control Register, for setting Decode / No Decode,

for inputting display data, and for setting the number of digits to drive. D11 to D0 of the

shift register are used for the detail settings of the digits currently being driven (Table 2).

4. All On

: Forcibly turns ON the data−side constant−current output. This mode is not affected by

D11 to D0.

The initial setting is four digits. When the digits must be changed,

use Load Register mode to set the number of digits to drive.

5. Standby

: Used to set Standby state (in which internal data are not cleared) and to clear data

(initialization). The settings in D3 to D0 of the shift register determine the choice between

standby state or initialization.

Table 1 Operating mode settings

D15

BLANK (OUT−n &

DIG−0~3 ALL−OFF)

0

NORMAL (OPERATION)

0

LOAD REGISTER (DUTY,

DECODE, DIGIT & DATA)

0

ALL ON (OUTn ALL−ON)

0

STAND−BY

0

REGISTER DATA

D14

D13

D12 D11~D8 D7~D4 D3~D0 HEX CODE

0

0

0

―

―

―

0−−−H

0

0

1

―

―

―

1−−−H

0

1

0

X

X

X

2XXXH

0

1

1

―

―

―

3−−−H

1

0

0

―

―

X

4−−XH

X = Input H or L. "−" = Are not affected by the truth table.

INITIAL

SETTING

■

6

2006-06-14

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