GMS81C2012/GMS81C2020
HYUNDAI MicroElectronics
R7 and R7IO register: R7 is a 4-bit bidirectional I/O port
(address 0CEH). Each port can be set individually as input
and output through the R7IO register (address 0CFH).
R73~R70 ports are multiplexed with Analog Input Port
AN8~AN11). R74, R75 ports are alternate function of
SXI, SXO ports. R74, R75 ports can be set individually as
input and output through the R7IO register.
can be used as a corresponding alternate features.
ADDRESS: 0CEH
RESET VALUE: Undefined
R6 Data Register
R73 R72 R71 R70
R75 R74
-
-
R7
Input / Output data
ADDRESS : 0CFH
RESET VALUE : --000000B
Alternate Function
AN8 (ADC input 8)
AN9 (ADC input 9)
AN10 (ADC input 10)
AN11 (ADC input 11)
R74(included Internal Pull-up Resister)
R75(included Internal Pull-up Resister)
Port Pin
R7 Direction Register
R70
R71
R72
R73
SXI
-
-
R7IO
Port Direction
0: Input
1: Output
SXO
ADDRESS : 0F8H
RESET VALUE : ----0000B
R7 Function Selection Register
The control register R7FUNC (address 0F8H) controls to
select alternate function. After reset, this value is "0", port
may be used as general I/O ports. To select alternate func-
tion such as Analog Input, write "1" to the corresponding
bit of R7FUNC. Regardless of the direction register R7IO,
R7FUNC is selected to use as alternate functions, port pin
-
-
-
-
3
2
1
0
R7FUNC
0: R70
1: AN8
0: R71
1: AN9
0: R72
1: AN10
0: R73
1: AN11
42
MAR. 2000 Ver 1.00
HYNIX [ HYNIX SEMICONDUCTOR ]
