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PCF8811U/2DA/1 데이터시트(PDF) 59 Page - NXP Semiconductors

부품명 PCF8811U/2DA/1
상세설명  80 x 128 pixels matrix LCD driver
PDF  73 Pages
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제조업체  PHILIPS [NXP Semiconductors]
홈페이지  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

PCF8811U/2DA/1 데이터시트(HTML) 59 Page - NXP Semiconductors

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2004 May 17
59
Philips Semiconductors
Product specification
80
× 128 pixels matrix LCD driver
PCF8811
handbook, full pagewidth
MSB
LSB
shifting
direction
0
MGW765
MMTC[2:0]
SEAL
BIT = 0
1
0
MSB
LSB
0
MMVOPCAL[4:0]
OTP SHIFT REGISTER
0
1
1
1
Fig.49 Shift register contents after example sequence of Table 25.
22.7
Programming flow
Programming is achieved whilst in CALMM mode and with
the application of the programming voltages. As
mentioned previously, the data for programming the OTP
cell is contained in the corresponding shift register cell.
The shift register cell must be loaded with a logic 1 in order
to program the corresponding OTP cell. If the shift register
cell contains a logic 0, then no action will take place when
the programming voltages are applied.
Once programmed, an OTP cell cannot be
de-programmed. An already programmed cell, i.e. an OTP
cell containing a logic 1, must not be re-programmed.
During programming a substantial current flows in the
VLCDIN pin. For this reason it is recommended to program
only one OTP cell at a time. This is achieved by filling all
but one shift register cells with logic 0.
It should be noted that the programming specification
refers to the voltages at the chip pins, contact resistance
must therefore be considered by the user.
An example sequence of commands and data for OTP
programming is given in Table 26.
The order for programming cells is not significant.
However, it is recommended that the seal bit is
programmed last. Once this bit has been programmed it
will not be possible to re-enter the CALMM mode.
It is assumed that the PCF8811 has just been reset.



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