mc14489 Freescale Semiconductor, Inc, mc14489 Datasheet - Page 9

• Manufacturer Part Number: mc14489
• Description: Multi-character Display/lamp Driver
• Manufacturer: Freescale Semiconductor, Inc

MOTOROLA
NOTES:
Hexadecimal
1. In the No Decode mode, outputs e, f, and g are unused and are all forced inactive (low). Output
2. Can be used as capital S.
3. Can be used as capital B.
4. Can be used as small g.
$A
$B
$C
$D
$E
Bank Nibble Value
$0
$1
$2
$3
$4
$5
$6
$7
$8
$9
$F
h decoding is unaffected, i.e., unchanged from the other modes. The No Decode mode is used
for three purposes:
a. Individually controlling lamps.
b. Controlling a half digit with sign.
c. Controlling annunciators - examples: AM, PM, UHF, kV, mm Hg.
MSB
L
L
L
L
L
L
L
L
H
H
H
H
H
H
H
H
Table 1. Triple–Mode Segment Decoder Function Table
Binary
L L
L L
L H
L H
H L
H L
H H
H H
L L
L L
L H
L H
H L
H L
H H
H H
LSB
L
H
L
H
L
H
L
H
L
H
L
H
L
H
L
H
Bits C1 to C5)
Hex Decode
(Invoked via
7–Segment Display
Characters
Bits C1 to C7)
(Invoked via
Special
Decode
on
on
on
on
on
on
on
on
d
Lamp Conditions
Bits C1 to C7)
(Invoked via
No Decode
on
on
on
on
on
on
on
on
c
on
on
on
on
on
on
on
on
b
on
on
on
on
on
on
on
on
a
MC14489
9