EM78815
8-Bit Microcontroller
Bit 0~Bit 3 (RAM2A8 ~ RAM2A11) : Data RAM address (Address 8 to Address 11)
for RAM reading or writing
Bit 4~Bit 7 : Undefined register, not for use.
7.3.6 IOC8 Port 8 I/O Control
7.3.6.1 Page 0 Port 8 I/O Control
Bit 7
IOC87
R/W-1
Bit 6
IOC86
R/W-1
Bit 5
IOC85
R/W-1
Bit 4
IOC84
R/W-1
Bit 3
IOC83
R/W-1
Bit 2
IOC82
R/W-1
Bit 1
IOC81
R/W-1
Bit 0
IOC80
R/W-1
Bit 0 ~ Bit 7 (IOC80 ~ IOC87) : Port 8 (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
7.3.6.2 Page 1 Undefined register
This register is unimplemented, not for use.
7.3.7 IOC9 Port 9 I/O Control
7.3.7.1 Page 0 Port 9 I/O Control
Bit 7
IOC97
R/W-1
Bit 6
IOC96
R/W-1
Bit 5
IOC95
R/W-1
Bit 4
IOC94
R/W-1
Bit 3
IOC93
R/W-1
Bit 2
IOC92
R/W-1
Bit 1
IOC91
R/W-1
Bit 0
IOC90
R/W-1
Bit 0 ~ Bit 7 (IOC90 ~ IOC97) : Port 9 (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
7.3.7.2 Page 1 Undefined register
This register is unimplemented, not for use.
7.3.8 IOCA Undefined Register
IOCA Page 0 and Page 1 are unimplemented, not for use.
52 •
Product Specification (V2.4) 02.17.2006
(This specification is subject to change without further notice)
ELAN [ ELAN MICROELECTRONICS CORP ]
