EM78569 View Datasheet(PDF) - ELAN Microelectronics
Part Name
Description
Manufacturer
EM78569 Datasheet PDF : 53 Pages
| |||
EM78569
8-bit Micro-controller
RC (PORTC I/O data, Counter1 data)
PAGE0 (PORT9 I/O data register)
7
6
5
4
3
2
1
0
PC7
PC6
PC5
PC4
PC3
PC2
PC1
PC0
R/W
R/W
R/W
R/W R/W
R/W
R/W
R/W
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 (Counter1 data register)
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
CN17 CN16 CN15 CN14 CN13 CN12 CN11 CN10
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
Bit 0 ~ Bit 7 (CN10 ~ CN17) : Counter1's buffer that user can read and write.
Counter1 is a 8-bit up-counter with 8-bit prescaler that user can use RC PAGE1 to preset and read the
counter.(write Î preset) After a interruption , it will reload the preset value.
Example for writing :
MOV 0x0C, A ; write the data at accumulator to counter1 (preset)
Example for reading :
MOV A, 0x0C ; read the data at counter1 to accumulator
PAGE2(LSB 8-bit Multiplication result)
7
MR7
6
MR6
5
MR5
4
MR4
3
MR3
2
MR2
1
MR1
0
MR0
R/W
R/W
R/W
R/W R/W
R/W
R/W
R/W
Bit 0 ~ Bit 7 (MR0 ~ MR7) : Multiplication result data
The multiplier can make a multiplication with X*Y. The multiplicator data buffer X is ACC(acculator) and
the multiplicand data buffer Y is RB PAGE2. The LSB 8-bit of maximum 24 bit multiplication result MR
will be stored in RC PAGE2.
RC PAGE2 = MR(0~7) = LSB 8-bit (X*Y)
PAGE3 (reserved)
(unused register)
RD (LCD control, Counter2 data)
PAGE0 (LCD driver control bits)
7
6
5
4
- VERSEL PHO
1
3
2
1
0
- LCD_C1 LCD_C0 LCD_M
R/W-0 R/W-0 R/W-0
R/W-0 R/W-0 R/W-0
Bit 0 (LCD_M) : LCD operation method including duty and frame frequency
Bit 1 ~ Bit 2 (LCD_C0 ~ LCD_C1) : LCD display control
LCD_C1 LCD_C0 LCD_M LCD Display Control Duty Bias
0
0
0 change duty
1/4
1/3
1 Disable(turn off LCD) 1/2
1/3
0
1
: Blanking
:
:
1
1
: LCD display enable
:
:
Ps. To change the display duty must set the "LCD_C1 ,LCD_C0" to "00".
__________________________________________________________________________________________________________________________________________________________________
* This specification is subject to be changed without notice.
23
8/31/2004 (V4.0)
Share Link: 