ST62E40B STMICROELECTRONICS [STMicroelectronics], ST62E40B Datasheet - Page 50

• Manufacturer Part Number: ST62E40B
• Description: 8-BIT OTP/EPROM MCU WITH LCD DRIVER, EEPROM AND A/D CONVERTER
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

ST62T40B/E40B
LCD CONTROLLER-DRIVER (Continued)
Figure 29. Typical Network to connect to V
pins if V
Figure 30. Addressing Map of the LCD RAM
50/72
50
E0
E1
E2
E3
E4
E5
E6
E7
E8
E9
EA
EB
EC
ED
EE
EF
F0
F1
F2
F3
F4
F5
F6
F7
RAM Address
V
V
LCD2/3
LCD1/3
LCD
V
V
LCD
SS
4.5V
S8
S16
S24
S32
S40
S48
S8
S16
S24
S32
S40
S48
S8
S16
S24
S32
S40
S48
S8
S16
S24
S32
S40
S48
MSB
R: 100k
C: 47nF
R
R
R
S7
S15
S23
S31
S39
S47
S7
S15
S23
S31
S39
S47
S7
S15
S23
S31
S39
S47
S7
S15
S23
S31
S39
S47
C
C
S6
S14
S22
S30
S38
S46
S6
S14
S22
S30
S38
S46
S6
S14
S22
S30
S38
S46
S6
S14
S22
S30
S38
S46
VR01840
LCD
S5
S13
S21
S29
S37
S45
S5
S13
S21
S29
S37
S45
S5
S13
S21
S29
S37
S45
S5
S13
S21
S29
S37
S45
Typical External resistances values are in the
range of 100 K to 150 K . External capacitances
in the range of 10 to 47 nF can be added to V
2/3 and V
nection is highly impedant.
4.5.3 LCD RAM
LCD RAM is organised as a LCD panel with a ma-
trix architecture. Each bit of its content is logically
mapped to a physical element of the display panel
addressed by a couple (Segment;Common). If a
bit is set, the relevant element of the LCD matrix is
turned-on. On the contrary, an element remains
turned-off as long the associated bit within the
LCD RAM is kept cleared.
After a reset, the LCD RAM is not initialised and
contain arbitrary information.
If the choosen multiplexing ratio does not use
some common plates, corresponding RAM ad-
dresses are free for general purpose data storage.
S4
S12
S20
S28
S36
S44
S4
S12
S20
S28
S36
S44
S4
S12
S20
S28
S36
S44
S4
S12
S20
S28
S36
S44
LCD
NA
S11
S19
S27
S35
S43
NA
S11
S19
S27
S35
S43
NA
S11
S19
S27
S35
S43
NA
S11
S19
S27
S35
S43
1/3 pins and to V
NA
S10
S18
S26
S34
S42
NA
S10
S18
S26
S34
S42
NA
S10
S18
S26
S34
S42
NA
S10
S18
S26
S34
S42
NA
S9
S17
S25
S33
S41
NA
S9
S17
S25
S33
S41
NA
S9
S17
S25
S33
S41
NA
S9
S17
S25
S33
S41
LSB
LCD
if the V
COM1
COM2
COM3
COM4
LCD
con-
LCD