Flash Mode

Carrier Mode

455kHz

600kHz

Flashed Pulse Width

tOSC

Modulation Period

N

8*

Number of Modulation Pulses

1536 x tOSC

Basic Unit of Pulse Distance

73728 x tOSC

Word Distance

The following number of pulses may be selected by Metal option : N = 8, 12, 16.

vider from divide by 3 during flash mode to divide by 4 during carrier mode. This allows the use of a 600kHz ceramic resonator dur-

correct divider ration is obtained by a metal mask option. For final parts, this is automatically done together with the selection of

flash-/carrier mode.

Code

Logic ”0”

Logic ”1”

Toggle Bit Time

Table 3 : Transmission Mode and Sub-system

Adress Selection.

The sub-system address and the transmission

mode are defined by connecting the ADRM input

to one or more driver outputs (DRV0N To DRV6N)

of the key matrix. If more than one driver is con-

nected to ADRM, they must be decoupled by di-

odes.

Mode

Sub-system Address

Driver DRVnN for n =

#

S2

S1

S0

012345

6

F

L

A

S

H

E

D

0

1

2

3

4

5

6

1

0

0

0

0

1

1

1

0

0

1

1

0

0

1

0

1

0

1

0

1

O

X

X

X

X

X

O

X

X

X

X

O

X

X

X

O

X

X

O

XO

M

O

D

U

L

A

T

E

D

0

1

2

3

4

5

6

1

0

0

0

0

1

1

1

0

0

1

1

0

0

1

0

1

0

1

0

1

O

X

X

X

X

X

O

X

X

X

X

O

X

X

X

O

X

X

O

XO

O

O

O

O

O

O

O

O= connected to ADRM

blank= not connected to ADRM

X = don’t care

Table 1 : Pulse Train Timing

Mode

µs)

µs)

Flashed

2.53

8.8

-

121

Modulated

2.53

-

121

M3005LAB1 - M3005LD

4/10