SAMHOP Microelectronics Corp.
VFD CONTROLLER / DRIVER
SM6311
SW DATA
The SW data is read by a read command, starting from the least significant bit. Bits 5 through 8 of the
SW data are 0.
MSB
0
0
0
0
b3
b2
b1
LSB
b0
sw
1
sw
2
sw
3
sw
4
COMMAND
A command sets the display mode and status of the FIP driver.
The first 1 byte input to the SM6311 through the D
IN
pin after the STB pin has fallen is regarded as
a command.
If STB is made high while a command / data is transmitted, serial communication is initialized, and the
command / data being transmitted is invalid ( however, the command / data already transmitted remains
valid ).
(1) Display mode setting command
The command initializes the SM6311 and selects the number of segments and number of grids ( 1/8
to 1/16 duty, 12 segments to 20 segments ).
When this command is executed, display is forcibly tuned off, and key scanning is also stopped.
To resume display, a display ON command must be executed. If the same mode is selected,
however, nothing is performed.
MSB
0
0
－
－
b3
b2
b1
LSB
b0
Dont's care
Selects display mode
0xxx : 8 digits, 20 segments
1000 : 9 digits, 19 segments
1001 : 10 digits, 18 segments
1010 : 11 digits, 17 segments
1011 : 12 digits, 16 segments
1100 : 13 digits, 15 segments
1101 : 14 digits, 14 segments
1110 : 15 digits, 13 segments
1111 : 16 digits, 12 segments
On power application, the 16-digit, 12-segment mode is selected.
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V.1.2, MAY,2003
SAMHOP [ SAMHOP MICROELECTRONICS CORP. ]
