EM78815
8-Bit Microcontroller
SCK
(SCES=0)
SCK
(SCES=1)
Bit7
Bit6
Bit5
Bit4
Bit1
Bit0
Bit2
Bit3
SDO
SDI
RBF
Shift data in
Shift data out
Fig. 14 SPI Timing
Clear by software
7.2.14 R8 Port 8 I/O Data, Data ROM Address, DTMF Receiver, SPI
Data
7.2.14.1 Page 0 Port 8 I/O Data
Bit 7
P87
Bit 6
P86
Bit 5
P85
Bit 4
P84
Bit 3
P83
Bit 2
P82
Bit 1
P81
Bit 0
P80
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 (P80 ~ P87) : 8-bit Port 8 ( 0~7 ) I/O data register
User can use the IOC register to define each bit either as input or output.
7.2.14.2 Page 1 Data ROM address
Bit 7
DRA15
R/W-X
Bit 6
DRA14
R/W-X
Bit 5
DRA13
R/W-X
Bit 4
DRA12
R/W-X
Bit 3
DRA11
R/W-X
Bit 2
DRA10
R/W-X
Bit 1
DRA9
R/W-X
Bit 0
DRA8
R/W-X
Bit 0 ~ Bit 7 (DRA8 ~ DRA15) : Data ROM address ( 8~15 ) for ROM reading
28 •
Product Specification (V2.4) 02.17.2006
(This specification is subject to change without further notice)
ELAN [ ELAN MICROELECTRONICS CORP ]
