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ST7565S
Ver 0.3c
51/73
2002/07/22
The booster ratio Register Set Sequence
Figure 29
NOP
Non-OPeration Command
E
R/W
A0
/RD /WR
D7 D6 D5 D4 D3 D2 D1 D0
0
1
0
1
1
1
0
0
0
1
1
Test
This is a command for IC chip testing. Please do not use it. If the test command is used by accident, it can be cleared by
applying a “L” signal to the /RES input by the reset command or by using an NOP.
E
R/W
A0
/RD /WR
D7 D6 D5 D4 D3 D2 D1 D0
0
1
0
1
1
1
1
1
1
*
*
* Inactive bit
Note: The ST7565S maintain their operating modes until something happens to change them. Consequently,
excessive
external noise, etc., can change the internal modes of the ST7565S . Thus in the packaging and system design it is
necessary to suppress the noise or take measure to prevent the noise from influencing the chip. Moreover, it is
recommended that the operating modes be refreshed periodically to prevent the effects of unanticipated
noise.
booster ratio select mode set
booster ratio register set
Set complete ?
YES
NO
Booster ratio select mode clear
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