SAMHOP Microelectronics Corp.
VFD CONTROLLER / DRIVER
SM6311
SERIAL COMMUNICATION FORMAT
Reception ( command / data write )
STB
D
IN
b0
b1
b2
b6
b7
CLK
1
2
3
7
8
Transmission ( data read )
STB
D
IN
b0
b1
b2
b3
b4
b5
b6
b7
CLK
D
OUT
1
2
3
4
5
6
7
8
t
WAIT
*
1
2
3
4
5
6
b0
b1
b2
b3
b4
b5
Data reading command is set.
Data reading starts.
Because the D
OUT
pin is an N-ch, open-drain output pin, be sure to connect an external pull-up resistor to
this pin ( 1 K
Ω
to 10 K
Ω
).
*
: When data is read, a wait time t
WAIT
of 1
μ
s
is necessary since the rising of the eighth clock that has
set the command, until the falling of the first clock that has read the data.
Page 7
V.1.2, MAY,2003
SAMHOP [ SAMHOP MICROELECTRONICS CORP. ]
