CHAPTER 15 VFD CONTROLLER/DRIVER
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User’s Manual U11302EJ4V0UM
15.9.3 Display type in which a segment spans two or more grids (display mode 2: DSPM05 = 1)
In display mode 2, all of the display output data are stored in the display data memory.
Figure 15-18 shows the display data RAM configuration and data reading order in a 23-segment x 5-grid display.
Figure 15-18. Display Data Memory Configuration and Data Reading Order (Display Mode 2)
Remarks 1.
<1> through <5> show the display output data reading order.
2.
The slashed area shows the segment data storage area.
3.
The shaded area shows the grid data storage area.
In the case of example
(3)
in
15.9
, the contents of the data memory areas indicated by shading and slashes are
as shown in Figure 15-21.
T0 through T6 in display mode 2 are for display patterns. Therefore, designate bits 4 to 7 (DIGS0 to DIGS3)
of display mode register 1 (DSPM1) as 7 patterns, and bits 0 to 4 (SEGS0 to SEGS4) of display mode register 0
(DSPM0) as 28 display outputs in total.
If there is some memory area where rewriting display output data is unnecessary, it should be masked by setting
display mode register 2 (DSPM2).
0 7
0 7
0 7
0 7
0
FA30H
FA31H
FA32H
FA33H
FA34H
FA35H
FA36H
FA37H
FA38H
FA39H
FA3AH
FA3BH
FA3CH
FA3DH
FA3EH
FA3FH
T0
T1
T2
T3
T4
T5
T6 T
KS
T7
T8
T9
T10
T11
T12
T13
T14
T15
Bit 7
Display
data
memory
FA70H <1>
FA71H <5>
FA72H
FA73H
FA74H
FA75H
FA76H
FA77H
FA78H
FA79H
FA7AH
FA7BH
FA7CH
FA7DH
FA7EH
FA7FH
FA60H <2>
FA61H
FA62H
FA63H
FA64H
FA65H
FA66H
FA67H
FA68H
FA69H
FA6AH
FA6BH
FA6CH
FA6DH
FA6EH
FA6FH
FA50H <3>
FA51H
FA52H
FA53H
FA54H
FA55H
FA56H
FA57H
FA58H
FA59H
FA5AH
FA5BH
FA5CH
FA5DH
FA5EH
FA5FH
FA40H
FA41H
FA42H
FA43H
FA44H
FA45H
FA46H
FA47H
FA48H
FA49H
FA4AH
FA4BH
FA4CH
FA4DH
FA4EH
FA4FH
<4>