TB62709NG/FG

2005-10-06

6

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

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,

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

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

standby state or initialization.

Table 1 Operating mode settings

REGISTER DATA

HEX CODE

INITIAL

SETTING

BLANK (OUT−n &

DIG−0~3 ALL−OFF)

0

0

0

0

―

―

―

0−−−H

■

NORMAL (OPERATION)

0

0

0

1

―

―

―

1−−−H

LOAD REGISTER (DUTY,

DECODE, DIGIT & DATA)

0

0

1

0

X

X

X

2XXXH

ALL ON (OUTn ALL−ON)

0

0

1

1

―

―

―

3−−−H

STAND−BY

0

1

0

0

―

―

X

4−−XH

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