ST7565-0A ETC1 [List of Unclassifed Manufacturers], ST7565-0A Datasheet - Page 41

• Manufacturer Part Number: ST7565-0A
• Description: 65 x 132 Dot Matrix LCD Controller/Driver
• Manufacturer: ETC1 [List of Unclassifed Manufacturers]

ST7565S
The Reset Circuit
When the /RES input comes to the “L” level, these LSIs
return to the default state. Their default states are as follows:
1. Display OFF
2. Normal display
3. ADC select: Normal (ADC command D0 = “L”)
4. Power control register: (D2, D1, D0) = (0, 0, 0)
5. Serial interface internal register data clear
6. LCD power supply bias rate:
7. All-indicator lamps-on OFF (All-indicator lamps ON/OFF
8. Power saving clear
9. V
10. Output conditions of SEG and COM terminals
11. Read modify write OFF
12. Static indicator OFF Static indicator register : (D1, D2) =
13. Display start line set to first line
14. Column address set to Address 0
15. Page address set to Page 0
16. Common output status normal
17. V
18. Electronic volume register set mode clear Electronic
19. Test mode clear
Ver 0.3c
( D 5 , D 4 , D 3 , D 2 , D 1 , D 0 ) = ( 1 , 0 . 0 , 0 , 0 , 0 )
1/65 DUTY = 1/9 bias
1/49,1/55,1/53 DUTY = 1/8 bias
1/33 DUTY = 1/6 bias
command D0 = “L”)
separation
SEG=VDD , COM=VDD
(0, 0)
volume register :
5
5
voltage regulator internal resistor ratio set mode clear
voltage regulator internal resistors Ra and Rb
41/72
On the other hand, when the reset command is used, the
above default settings from 11 to 19 are only executed.
When the power is turned on, the IC internal state becomes
unstable, and it is necessary to initialize it using the /RES
terminal. After the initialization, each input terminal should
be controlled normally.
Moreover, when the control signal from the MPU is in the
high impedance, an over current may flow to the IC. After
applying a current, it is necessary to take proper measures to
prevent the input terminal from getting into the high
impedance state.
If the internal liquid crystal power supply circuit is not used on
ST7565S,it is necessary that /RES is “H” when the external
liquid crystal power supply is turned on. This IC has the
function to discharge V
power supply short-circuits to V
While /RES is “L,” the oscillator and the display timing
generator stop, and the CL, FR, FRS and /DOF terminals are
fixed to “H.” The terminals D0 to D7 are not affected. The
V
This means that an internal resistor is connected between
V
When the internal liquid crystal power supply circuit is not
used on other models of ST7565S series, it is necessary that
/RES is “L” when the external liquid crystal power supply is
turned on.
While /RES is “L,” the oscillator works but the display timing
generator stops, and the CL, FR, FRS and /DOF terminals
are fixed to “H.” The terminals D0 to D7 are not affected.
DD
DD
level is output from the SEG and COM output terminals.
and V
5
.
5
when /RES is “L,” and the external
DD
when /RES is “L.”
2002/07/22