EM785830AA
8-bit Micro-controller
RC (PORTC I/O data, Counter1 data)
PAGE0 (PORT9 I/O data register)
7
X
-
6
X
-
5
X
-
4
X
-
3
X
-
2
1
0
X
-
PC2
R/W
PC1
R/W
Bit 1 ~ Bit 2 (PC1 ~ PC2): PORTC1,PORTC2 I/O data register
User can use IOC register to define input or output each bit.
Bit 0; Bit 3~Bit 7: (undefined) not allowed to use. These bits are not sure to 0 or 1
PAGE1 (Counter1 data register)
Bit7
CN17
R/W-0
Bit6
CN16
R/W-0
Bit5
CN15
R/W-0
Bit4
CN14
R/W-0
Bit3
CN13
R/W-0
Bit2
CN12
R/W-0
Bit1
CN11
R/W-0
Bit0
CN10
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
PAGE2,3 (undefined) not allowed to use. This page is not sure to 0 or 1
RD (Counter2 data)
PAGE0 (Unused)
7
X
-
6
0
5
0
4
1
3
X
-
2
0
1
0
0
0
R/W-0
R/W-0
R/W-0
R/W
R/W
R/W
Bit 0 ~Bit 2 : These three bits must clear to 0 or MCU power consumption will increase.
Bit 3 , Bit 7 : (undefined) not allowed to use
Bit4 ~ Bit6: These 3 bits are unused, please clear bit5 and bit6 to 0 and set bit4 to 1.
PAGE1 (Counter2 data register)
Bit7
CN27
R/W
Bit6
CN26
R/W
Bit5
CN25
R/W
Bit4
CN24
R/W
Bit3
CN23
R/W
Bit2
CN22
R/W
Bit1
CN21
R/W
Bit0
CN20
R/W
Bit 0 ~ Bit 7 (CN20 ~ CN27) : Counter2's buffer that user can read and write.
Counter2 is a 8-bit up-counter with 8-bit prescaler that user can use RD PAGE1 to preset and read the
counter.(write Î preset) After a interruption, it will reload the preset value.
Example for writing :
MOV 0x0D, A ; write the data at accumulator to counter2 (preset)
Example for reading :
MOV A, 0x0D ; read the data at counter2 to accumulator
PAGE2,3 (undefined) not allowed to use. This page is not sure to 0 or 1
__________________________________________________________________________________________________________________________________________________________________
* This specification is subject to be changed without notice.
17
12/1/2004 V1.6
ELAN [ ELAN MICROELECTRONICS CORP ]
