EM78815
8-Bit Microcontroller
User must assign an external LCD address for the first time. After writing or reading
the display data, the Segment address is automatically incremented. Hence, the
MCU can continuously write or read data to the address.
Bit 3 (CSS) :
External LCD driver chip select bit
0/1 → Chip 1 / Chip 2
Unused
Bit 4 ~ Bit 5 :
Bit 6(CWPWR) : CAS Decoder Power Control
0/1 → Power off / Power on
Bit 7 (EXA17) : Expanded Data ROM start address MSB. This bit can be set
only at the connected pin ”EXSAL” to VDD.
7.3.10 IOCC Port C I/O Control, Port 6 Pull-high Register
7.3.10.1 Page 0 Port C I/O Control
Bit 7
IOCC7
R/W-1
Bit 6
IOCC6
R/W-1
Bit 5
IOCC5
R/W-1
Bit 4
IOCC4
R/W-1
Bit 3
IOCC3
R/W-1
Bit 2
IOCC2
R/W-1
Bit 1
IOCC1
R/W-1
Bit 0
IOCC0
R/W-1
Bit 0~Bit 7 (IOCC0~IOCC7) : Port C (0~7) I/O direction control register
0 → puts the relative I/O pin as output
1 → puts the relative I/O pin into high impedance
7.3.10.2 Page 1 Port 6 Pull-high Register
Bit 7
PH67
R/W-0
Bit 6
PH66
R/W-0
Bit 5
PH65
R/W-0
Bit 4
PH64
R/W-0
Bit 3
PH63
R/W-0
Bit 2
PH62
R/W-0
Bit 1
PH61
R/W-0
Bit 0
PH60
R/W-0
Bit 0~Bit 7(PH60~PH67) : PORT6(0~7) pull high control register
0 → disable pull-high function
1 → enable pull-high function
7.3.11 IOCD Port D I/O Control, Port 7 Pull-high Register
7.3.11.1 Page 0 Port D I/O Control
Bit 7
IOCD7
R/W-1
Bit 6
IOCD6
R/W-1
Bit 5
IOCD5
R/W-1
Bit 4
IOCD4
R/W-1
Bit 3
IOCD3
R/W-1
Bit 2
IOCD2
R/W-1
Bit 1
IOCD1
R/W-1
Bit 0
IOCD0
R/W-1
Bit 0~Bit 6 (IOCD0~IOCD6) : Port D (0~6) I/O direction control register
0 → puts the relative I/O pin as output
1 → puts the relative I/O pin into high impedance
56 •
Product Specification (V2.4) 02.17.2006
(This specification is subject to change without further notice)
ELAN [ ELAN MICROELECTRONICS CORP ]
