pcf8813 NXP Semiconductors, pcf8813 Datasheet - Page 31

• Manufacturer Part Number: pcf8813
• Description: 67 + 1 X 102 Pixels Matrix Lcd Driver
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Table 7 Read status byte
Table 8 Display control; bits D and E
Table 9 Set temperature coefficient; bits TC[1:0]
Table 10 Set voltage multiplication factor; bits S[1:0]
11.1
Immediately following Power-on, all internal registers as
well as the RAM content are undefined. A RES pulse must
be applied to the reset input.
Reset is accomplished by applying an external reset pulse
(active LOW) at the pad RES. When reset occurs within
the specified time all internal registers are reset, however
the RAM is still undefined. The RES input must be 0.3V
when V
time t
A reset can also be made by sending a reset command.
This command can be used during normal operating but
not to initialize the chip after Power-on.
2004 Mar 05
BUSY
DON
RES
MF[2:0]
DS[1:0]
TC
S
(67 + 1)
D
0
1
0
1
0
0
1
1
0
0
1
1
1
1
BIT
VHRL
Initialization
DD
TC
S
E
0
0
1
1
0
1
0
1
0
1
0
1
0
reaches V
after V
0
0 = chip is able to accept new commands; 1 = chip is unable to accept new commands
0 = display OFF; 1 = display ON
0 = reset NOT in progress; 1 = reset in progress
manufacturer identification bits
device recognition; currently has a fixed value of 00 (recognition bits for a driver with 64 to 67 rows)
display blank
normal mode
all display segments on
inverse video mode
V
V
V
V
2
3
4
5
LCD
LCD
LCD
LCD
DD
102 pixels matrix LCD driver
voltage multiplier
voltage multiplier
voltage multiplier
voltage multiplier
temperature coefficient 0
temperature coefficient 1
temperature coefficient 2
temperature coefficient 3
going HIGH (see Fig.37).
DD(min)
(or higher) within a maximum
FUNCTION
FUNCTION
FUNCTION
DD
31
FUNCTION
11.2
After reset the LCD driver has the following state:
11.3
Power-down mode gives the following circuit status:
Power-down mode (PD = 1)
Horizontal addressing (V = 0)
Normal instruction set (H = 0)
Display blank (D and E = 00)
Address counter X[6:0] = 0000000 and Y[3:0] = 0000
Temperature control mode TC[1:0] = 00
V
Power control is enabled (PC = 1)
Normal row driving of display (N/P = 1)
Partial mode set for all rows available
(M[7:0] = 11111111)
HV generator programmed off (V
2
After power-on, RAM data is undefined, the reset signal
does not change the content of the RAM
Data order DO = 0
All LCD outputs at V
Bias system (BS[2:0] = 000
Display start line set to R0 (C[6:0] = 000000)
RAM line address set to 0 (L[6:0] = 000000)
Maximum X address = 101 (X
Maximum Y address = 8 (Y
Display is not mirrored (MX = 0; MY = 0 and BRS = 0).
V
All LCD outputs go to V
Bias generator and V
be disconnected
Oscillator switches off (external clock is possible)
RAM contents are not cleared; RAM data can be written.
LCD
LCD
voltage multiplier (S[1:0] = 00)
Reset function
Power-down mode
is equal to 0 and PRS = 0
discharges to V
SS
LCD
SS
(display off)
SS
as Power-down mode occurs
generator switch-off, V
(display off)
max
max
[3:0] = 1000)
PR
[6:0] = 1100101)
Product specification
[6:0] = 0000000)
PCF8813
LCD
can