GMS81C2020/GMS81C2120
Hyundai Micro Electronics
12.7 R5 and R5IO registers
12.8 R6 and R6IO registers
R5 is an 8-bit bidirectional I/O port (address CAH). Each
pin can be set individually as input and output through the
R5IO register (address CBH).In addition, Port R5 is multi-
plexed with Serial Peripheral Interface (SPI). The control
register R5FUNC (address F6H) controls to select Serial
Peripheral Interface function.After reset, the R5IO register
value is "0", port may be used as general I/O ports. To se-
lect Serial Peripheral Interface function, write "1" to the
corresponding bit of R5FUNC.
R6 is an 8-bit bidirectional I/O port (address CCH). Each
port can be set individually as input and output through the
R6IO register (address CDH).
R67~R60 ports are multiplexed with Analog Input Port
( AN7~AN0 )..
ADDRESS : CCH
R6 Data Register
RESET VALUE : Undefined
R6
R67 R66 R65 R64 R63 R62 R61 R60
INPUT / OUTPUT DATA
ADDRESS : CDH
ADDRESS : CAH
R5 Data Register
RESET VALUE : Undefined
R6 Direction Register
R6IO
RESET VALUE : 00000000
R5
R57 R56 R55 R54 R53 R52 R51 R50
INPUT / OUTPUT DATA
ADDRESS : CBH
DIRECTION SELECT
0 : INPUT PORT
1 : OUTPUT PORT
R5 Direction Register
R5IO
RESET VALUE : 00000000
R6 Function Selection Register
R6FUNC
ADDRESS : F7H
RESET VALUE : 00000000
DIRECTION SELECT
0 : INPUT PORT
1 : OUTPUT PORT
ANSEL7 ANSEL6 ANSEL5 ANSEL4 ANSEL3 ANSEL2 ANSEL1 ANSEL0
R5 Function Selection Register
R5FUNC
0 : R64
1 : AN4
0 : R60
1 : AN0
0 : R61
1 : AN1
0 : R62
1 : AN2
0 : R63
1 : AN3
ADDRESS : F6H
RESET VALUE : -0000---
0 : R65
1 : AN5
0 : R66
1 : AN6
0 : R67
1 : AN7
-
PWM1O SOUT
SIN
SCLK
-
-
-
0 : R53
1 : SCLK
0 : R56
1 : PWM1O/T1O
0 [R5IO.3] : SCLKO
1 [R5IO.3] : SCLKI
0 : R55
1 : SOUT
0 : R54
1 : SIN
Figure 12-8 Registers of Port R6
Figure 12-7 Registers of Port R5
R5FUNC
Description
[6:3]
PORT
0
1
R56 (Normal I/O Port)
R56/
PWM1O/
T1O
PWM1 Data Output / Timer
1 Data Output
0
1
0
1
0
R55 (Normal I/O Port)
SPI Serial Data Output
R54 (Normal I/O Port)
SPI Serial Data Input
R53 (Normal I/O Port)
R55/SOUT
R54/SIN
0 [R5IO.3] SPI Synchronous Clock
SCLKO Output
R53/SCLK
1 [R5IO.3] SPI Synchronous Clock
SCLKI Input
Table 12-1 Registers of Port R5FUNC
46
preliminary
Nov. 1999 Ver 0.0
HYNIX [ HYNIX SEMICONDUCTOR ]
