HT16514 Datasheet, PDF (30/39 Pages) Holtek Semiconductor Inc – Dot Character VFD Controller & Driver

HT16514
Commands
Instruction
RS R, W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
Description
Clear display
Clear all display, and
0 0 0 0 0 0 0 0 0 0 sets the DDRAM ad-
dress at 00H.
Cursor home
Sets the DDRAM ad-
dress at 00H. Also re-
0
0
0
0
0
0
0
0
1
x
turns the display shifted
to the original position.
The DDRAM contents
remain unchanged.
Entry mode set
Sets the cursor direction
and specifies the display
0 0 0 0 0 0 0 1 I/D S shift. These operations
are performed during
writing/reading data.
Display On/Off
Sets all display
ON/OFF(D), cursor
0 0 0 0 0 0 1 D C B ON/OFF(C), cursor
blink of character
position (B).
Shifts display or cursor,
Cursor or display shift 0 0 0 0 0 1 S/C R/L x x w h i l e ke e p i n g t h e
DDRAM contents.
Function
Sets data length
0 0 0 0 1 DL N x BR1 BR0 (in parallel data transfer)
and Number of line
CGRAM address set 0 0 0 1
ACG
Sets the address of the
CGRAM. After that, data
of the DDRAM is trans-
ferred.
DDRAM address set 0 0 1
ADD
Sets the address of the
DDRAM. After that, data
of the DDRAM is trans-
ferred.
Read busy flag &
address
0 1 BF=0
ACC
Reads the busy flag (BF)
and the address counter.
BF is output as ²0² al-
ways.
Write data to CGRAM
or DDRAM
1
0
Write data
Writes data into the
CGRAM of the DDRAM.
Read data from
CGRAM or DDRAM
1
1
Read DR data
Reads data from the
CGRAM or DDRAM.
Note:
I/D=1: Increment, I/D=0: Decrement
S=1: Display shift enable, S=0: Cursor shift enable
S/C=1: Display shift, S/C=0: Cursor shift
R/L=1: Right shift, R/L=0: Left shift
DL=1: 8bit, DL=0: 4bit
BR1, BR0= (00: 100%) , (01: 75%) , (10: 50% ) , (11: 25%)
²X²: Don¢t care
ACG: CGRAM address
ADD: DDRAM address
ACC: Address counter
DDRAM: Display Data RAM
CGRAM: Character Generator RAM
Rev. 1.00
30
October 4, 2006