EM78871H Ver la hoja de datos (PDF) - ELAN Microelectronics
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EM78871H Datasheet PDF : 59 Pages
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EM78871
8-bit Micro-controller
PORT77 's wakeup function is controlled by IOCF bit5 and ENI instruction. It's falling edge or rising edge trigger
(controlled by CONT register).
PAGE1 (LCD address)
7
6
5
4
3
2
1
0
LCDA7 LCDA6 LCDA5 LCDA 4 LCDA 3 LCDA 2 LCDA 1 LCDA 0
Bit 0 ~ Bit 7 (LCDA0 ~ LCDA7) : LCD address for LCD RAM reading or writing
The data in the LCD RAM correspond to the COMMON and SEGMENT signals as the table .
COM23 ~ COM16
(set R9 PAGE1 bit7=1)
Address 100H
Address 101H
Address 102H
:
:
:
Address 14EH
Address 14FH
Address 150H
:
Address 17FH
COM15 ~COM8
(set R9 PAGE1 bit7=0)
Address 80H
Address 81H
Address 82H
:
:
:
Address CEH
Address CFH
Address D0H
:
Address FFH
COM7 ~ COM0
(set R9 PAGE1 bit7=0)
Address 00H
Address 01H
Address 02H
:
:
:
Address 4EH
Address 4FH
Address 50H
:
Address 7FH
SEG0
SEG1
SEG1
:
:
:
SEG78
SEG79
Empty
:
Empty
RB (PORTB I/O data, LCD data)
PAGE0 (PORTB I/O data register)
7
6
5
4
3
2
1
0
PB7
PB6
PB5
PB4
PB3
PB2
PB1
PB0
Bit 0 ~ Bit 7 (PB0 ~ PB7) : 8-bit PORTB(0~7) I/O data register
User can use IOC register to define input or output each bit.
PAGE1 (LCD data buffer)
7
6
5
4
3
2
1
LCDD7 LCDD6 LCDD5 LCDD4 LCDD3 LCDD2 LCDD1
Bit 0 ~ Bit 7 (LCDD0 ~ LCDD7) : LCD data buffer for LCD RAM reading or writing
0
LCDD0
Example.
MOV
MOV
MOV
MOV
MOV
MOV
:
A,@0
R9_PAGE1,A
RA_PAGE1,A
A,@0XAA
RB_PAGE1,A
A,RB_PAGE1
;ADDRESS
;WRITE DATA 0XAA TO LCD RAM
;READ DATA FROM LCD RAM
RC (PORTC I/O data, Data RAM data)
PAGE0 (PORTC I/O data register)
7
6
5
4
3
2
1
0
PC7
PC6
PC5
PC4
PC3
PC2
PC1
PC0
Bit 0 ~ Bit 7 (PC0 ~ PC7) : 8-bit PORTC(0~7) I/O data register
User can use IOC register to define input or output each bit.
PAGE1 (Data RAM data buffer)
__________________________________________________________________________________________________________________________________________________________________
* This specification is subject to be changed without notice. 21
8/23/04 (V1.5)
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