em6522 EM Microelectronic, em6522 Datasheet - Page 49
em6522
Manufacturer Part Number
em6522
Description
Mfp Version Of Em6622 Ultra Low Power Microcontroller With 4x32 Lcd Driver
Manufacturer
EM Microelectronic
Datasheet
1.EM6522.pdf
(68 pages)
14.3 Free Segment Allocation
Each Segment (SEG[32:1]) terminal outputs the time multiplexed information from its 4 Segment data latches.
Information stored in latch 1 is output during phase1, latch 2 during phase 2, latch 3 during phase 3 and latch 4
during phase 4. In the case of 3 to 1 multiplexing the phase 4 and the latch 4 are not used. This phase
information on the segment outputs together with the common outputs (COM[4:1]) - also called back-planes -
defines if a given LCD segment is light or not. COM[1] is on during phase 1 and off during phase 2,3,4 ,
COM[2] is on during phase 2 and off during phase 1,3,4 , etc.
For each segment data latch the address location within the LCD address spacing ( LCD_3 + Index(8), LCD_2
+ Index(16), LCD_1 + Index(16) --> LCDAdr[39:0] ) can be user defined.
For each segment data latch the data bus connection (DB[3:0]) can be user defined.
Table 14.3.1 Default LCD Configuration used on EM6522
14.4 LCD Registers
Table 14.4.1 Register RegLcdCntl1
Table 14.4.2 Multiplier Clock Frequency Select
Table 14.4.3 Register LcdCntl2
Copyright © 2005, EM Microelectronic-Marin SA
Segment outputs
StrobeOutSel1,0 is reset by initial power on only.
Bit
Bit
3
2
1
0
CkTripSel0
3
2
1
0
SEG[30]
SEG[31]
SEG[32]
SEG[1]
SEG[2]
SEG[3]
LCDExtSupply is reset to ‘0’ by POR only.
...
0
1
0
1
R
LCDExtSupply
StrobeOutSel1
StrobeOutSel0
CkTripSel1
CkTripSel0
LCDBlank
LCD4Mux
LCDOff
Name
Name
DB[0], LCDAdr[30]
DB[0], LCDAdr[31]
DB[0], LCDAdr[32]
DB[0], LCDAdr[0]
DB[0], LCDAdr[1]
DB[0], LCDAdr[2]
= phase1
COM[1]
CkTripSel1
...
0
0
1
1
POR to ‘0’
POR to ‘0’
POR to ‘0’
Reset
Reset
1
1
1
0
0
DB[1], LCDAdr[30]
DB[1], LCDAdr[31]
DB[1], LCDAdr[32]
DB[1], LCDAdr[0]
DB[1], LCDAdr[1]
DB[1], LCDAdr[2]
Multiplier Clock
= phase2
R/W
R/W
R/W
R/W
R/W
COM[2]
R/W
R/W
R/W
R/W
R/W
...
Ck[10]
Ck[9]
Ck[8]
Ck[7]
49
External supply for VL1, VL2 and VL3
DB[2], LCDAdr[30]
DB[2], LCDAdr[31]
DB[2], LCDAdr[32]
DB[2], LCDAdr[0]
DB[2], LCDAdr[1]
DB[2], LCDAdr[2]
LCD multiplier clock select
LCD multiplier clock select
LCD Segment outputs off
= phase3
LCD off (multiplier off)
COM[3]
Strobe output select
Strobe output select
4 : 1 multiplexed
...
on 32 KHz operation
Description
Description
512 Hz
256 Hz
128 Hz
64 Hz
www.emmicroelectronic.com
DB[3], LCDAdr[30]
DB[3], LCDAdr[31]
DB[3], LCDAdr[32]
EM6522
DB[3], LCDAdr[0]
DB[3], LCDAdr[1]
DB[3], LCDAdr[2]
= phase4
COM[4]
...