pcf8535 NXP Semiconductors, pcf8535 Datasheet - Page 26

• Manufacturer Part Number: pcf8535
• Description: 65 X 133 Pixel Matrix Driver
• Manufacturer: NXP Semiconductors

Philips Semiconductors
7.16.2.5
The X address is used as a pointer to the RAM for RAM
writing. The range of X is 0 to 127 and may be extended by
the XM
directly corresponds to the display column number when
MX = 0 and corresponds to the inverse display column
number when MX = 1 (see Table 14).
Table 14 X address pointer
7.16.3
7.16.3.1
The D and E bits set the display mode as given in
Table 15.
Table 15 Display control
7.16.3.2
Mirror X and mirror Y have the effect of flipping the display
left to right or top to bottom respectively. MX works by
changing the order data that is written into the RAM.
As such, the effects of toggling MX will only be seen after
data is written into the RAM. MY works by reversing the
order that column data is accessed relative to the row
outputs. The effect of toggling MY will be seen
immediately. The behaviour of both of these bits is further
described in Section 7.15.
2001 Nov 07
65
XM
D
0
1
0
1
0
129
130
131
132
0
, X[6:0]
0
1
2
3
:
bit. The combined value of XM
D
133 pixel matrix driver
ISPLAY SETTING COMMAND PAGE
Set X address of RAM
Display control
External display control
E
0
0
1
1
MX = 0
C129
C130
C131
C132
ADDRESSED COLUMN
all display segments on
C0
C1
C2
C3
:
normal mode
inverse video
display blank
MODE
0
and X address
MX = 1
C132
C131
C130
C129
C3
C2
C1
C0
:
26
7.16.3.3
BS[2:0] sets the bias system (see Section 7.10).
7.16.3.4
Physically large displays require stronger drivers. Bit IB
enables the user to select a stronger driving mode and
should be used if suitable display quality can not be
achieved with the default setting.
7.16.3.5
M[2:0] sets the multiplex rate (see Section 7.9).
7.16.4
7.16.4.1
PRS
Bit PRS selects the programmable charge pump range
select. This bit defines whether the programmed voltage
for V
this bit is further described in Section 7.13.
HVE
Bit HVE enables the high voltage generator. When set to
logic 0, the charge pump is disabled. When set to logic 1,
the charge pump is enabled.
7.16.4.2
S[1:0] set the multiplication factor of the charge pump
ranging from times 2 to times 5. The behaviour of these
bits is further described in Section 7.14.
7.16.4.3
TC[2:0] set the required temperature coefficient.
The behaviour of these bits is further described in
Section 7.12.
7.16.4.4
The SM bit is used to initiate a temperature measurement.
The SM bit is automatically cleared at the end of the
measurement. The behaviour of this bit is further
described in Section 7.11.
7.16.4.5
V
display.
OP
[6:0] sets the required operating voltage for the
OP
is in the LOW or the HIGH range. The behaviour of
HV-
Bias system
Display size
Multiplex rate
HV-gen control
HV-gen stages
Temperature coefficients
Temperature measurement control
V
LCD
GEN COMMAND PAGE
control
Product specification
PCF8535