TH58100FT Datasheet, PDF (36/43 Pages) Toshiba Semiconductor – TENTATIVE TOSHIBA MOS DIGITAL INTEGRATED CIRCUIT SILICON GATE CMOS

TH58100FT
(8) Pointer control for “00H”, “01H” and “50H”
The device has three Read modes which set the destination of the pointer. Table 7 shows the destination of
the pointer, and Figure 14 is a block diagram of their operations.
Table 8. Pointer Destination
Read Mode
Command
(1)
00H
(2)
01H
(3)
50H
Pointer
0 to 255
256 to 511
512 to 527
0
255 256
511 512 527
A
B
C
(1) 00H
(2) 01H
(3) 50H
Pointer control
Figure 19. Pointer control
The pointer is set to region A by the “00H” command, to region B by the “01H” command, and to region C by
the “50H” command.
(Example)
The “00H” command must be input to set the pointer back to region A when the pointer is pointing to region
C.
00H
Add
Start point
Add
Start point
A area
A area
50H
Add
Start point
Add
Start point
C area
C area
01H
Add
Start point
Add
Start point
B area
A area
50H
Add
00H
Add
To program region C only, set the start point to region C using the 50H command.
Start point
C area
Start point
A area
50H
80H
10H
Add
DIN Start point
Programming region C only
C Area
01H
80H
10H
Add
DIN Start point
Programming region B and C
B Area
Figure 20. Example of How to Set the Pointer
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