pcf8813 NXP Semiconductors, pcf8813 Datasheet - Page 50

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

Philips Semiconductors
Table 19 V
2004 Mar 05
(67 + 1)
V
+10
+11
+12
+13
+14
+15
+0
+1
+2
+3
+4
+5
+6
+7
+8
+9
CAL
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
voltage when the temperature coefficient is set
to TC3
CAL
codes and associated nominal calibration
102 pixels matrix LCD driver
V
CAL
00000
00001
00010
00011
00100
00101
00110
00111
01000
01001
01010
01011
01100
01101
01110
01111
11111
11110
11101
11100
11011
11010
11001
11000
10111
10110
10101
10100
10011
10010
10001
10000
[4:0]
CALIBRATION
0 (default)
+102.4
+128.0
+153.6
+179.2
+204.8
+230.4
+256.0
+281.6
+307.2
+332.8
+358.4
+384.0
+25.6
+51.2
+76.8
V
(mV)
102.4
128.0
153.6
179.2
204.8
230.4
256.0
281.6
307.2
332.8
358.4
384.0
409.6
25.6
51.2
76.8
LCD
50
17.2
The second OTP feature defines the manufacturer
identity. A 3-bit code MF[2:0] is used to define this
parameter. The default manufacturer identity is
MF[2:0] = 000.
17.3
Module maker programming is performed in a special
mode; the calibration mode MM. This mode is entered via
the interface command, MM. To prevent wrongful
programming, a seal bit prevents the device from entering
the calibration mode. This seal bit, once programmed,
cannot be reversed, thus further changes in programmed
values are not possible. However it is possible to disable
all programmed values by applying the disable OTP
command.
Applying the programming voltages when not in MM mode
will have no effect on the programmed values.
Table 20 Seal bit definition
17.4
17.4.1
The OTP circuitry in the PCF8813 contains nine bits of
data: five for V
identity and one for the seal bit. The circuitry for 1-bit is
called an OTP slice. Each OTP slice consists of two main
parts: the OTP cell (a non-volatile memory cell) and the
shift register cell (a flip-flop). The OTP cells are accessible
only through their shift register cells; both reading-from
and writing-to the OTP cells are performed with the shift
register cells, but only the shift register cells are visible to
the rest of the circuit. The basic OTP architecture is shown
in Fig.48.
SEAL BIT
Manufacturer identity
Seal bit
One time programming
0
1
A
RCHITECTURE
LCD
possible to enter calibration mode
calibration mode disabled
calibration, three for the manufacturer
ACTION
Product specification
PCF8813