MC3411AU 查看數據表（PDF） - Unspecified

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MC3411AU

16 SEGMENT X 12 GRID VFD DRIVER WITH KEYSCAN

Unspecified 

MC3401A/3411A

LED Display

MC3401A/3411A provides 4 LED Display Terminals, namely LED1 to LED4. Data is written to the LED Port starting

from the least significant bit (b0) of the port using a WRITE Command. Each bit starting from the least significant

(b0) activates a specific LED Display Terminal – b0 corresponds LED1 Display, b1 activates LED2 and so forth.

Since there are only 4 LED display terminals, bits 5 to 8 (b4 ~ b7) are not used and therefore ignored. This means

that b4 to b7 does NOT in anyway activate any LED Display, they are totally ignored.

When a bit (b0 ~ b3) in the LED Port is “1”, the corresponding LED is OFF. Conversely, when the bit is “0”, the LED

Display is turned ON. For example, Bit 1 (as designated by b0) has the value of “1”, then this means that LED1 is

OFF. It must be noted that when power is turned ON, bit 1 to bit 4 (b0 to b3) are given the value of “0” (all

LEDs are turned ON). Please refer to the diagrams below.

MSB

LSB

-

-

-

-

b3 b2 b1 b0

Don’t Care

LED1

LED2

LED3

LED4

February 28, 2013 Ver. 1.10

19/29

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