EM78815
8-Bit Microcontroller
Bit 3 (CDAS) : Current DA switch
0 → normal Port D7
1 → Current DA output
Bit 4 ~ Bit 7 : Undefined Register. These bits are undefined and not for use.
7.2.12 R6 Port 6 I/O Data, Data ROM Data Buffer, CNT1 Data (H),
DA Control
7.2.12.1 Page 0 Port 6 I/O Data
Bit 7
P67
Bit 6
P66
Bit 5
P65
Bit 4
P64
Bit 3
P63
Bit 2
P62
Bit 1
P61
Bit 0
P60
R/W-X
R/W-X
R/W-X
R/W-X
R/W-X
R/W-X
R/W-X
R/W-X
Bit 0 ~ Bit 7 (P60 ~ P67) : 8-bit Port 6 (0~7) I/O data register
User can use IOC register to define whether each bit is input or output.
7.2.12.2 Page 1 Data ROM Data Buffer
Bit 7
DRD7
R
Bit 6
DRD6
R
Bit 5
DRD5
R
Bit 4
DRD4
R
Bit 3
DRD3
R
Bit 2
DRD2
R
Bit 1
DRD1
R
Bit 0
DRD0
R
Bit 0 ~ Bit 7 (DRD0 ~ DRD7) : Data ROM data buffer for ROM reading.
Example.
MOV A,@1
MOV R7_PAGE1,A
MOV A,@0
MOV R8_PAGE1,A
MOV A,@0
MOV R9_PAGE1,A
MOV A,R6_PAGE1
;read the data at the Data ROM, of which
;address is "00001".
7.2.12.3 Page 2 Counter 1 High 8-bit Data Buffer
Bit 7
CN1F
R/W-0
Bit 6
CN1E
R/W-0
Bit 5
CN1D
R/W-0
Bit 4
CN1C
R/W-0
Bit 3
CN1B
R/W-0
Bit 2
CN1A
R/W-0
Bit 1
CN19
R/W-0
Bit 0
CN18
R/W-0
Bit 0~Bit 7 (CN18~CN1F) : Counter 1 high 8 bits data buffer. Refer to R5
Page 2 Counter 1 low 8-bit data buffer for details.
22 •
Product Specification (V2.4) 02.17.2006
(This specification is subject to change without further notice)
ELAN [ ELAN MICROELECTRONICS CORP ]
