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HMS81C4X60 Datasheet(PDF) 35 Page - Hynix Semiconductor

No. de pieza HMS81C4X60
Descripción Electrónicos  HYNIX SEMICONDUCTOR INC. 8-BIT SINGLE-CHIP MICROCONTROLLERS
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Fabricante Electrónico  HYNIX [Hynix Semiconductor]
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HMS81C4X60 Datasheet(HTML) 35 Page - Hynix Semiconductor

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HMS81C4x60
November 2001 Ver 1.1
33
9.2 I/O Ports Configuration
R0 Ports
R07 ~ R04 is an open drain bidirectional I/O port and R03
~ R00 is a CMOS bidirectional I/O port(address 0C0H).
Each I/O pin can independently used as an input or an out-
put through the R0DD register (address 0C1H).
The control registers for R0 are shown below.
R1 Ports
R1 is a 5-bit CMOS input port only(address 0C2H). Each
pin can independently used as an input through the R1DD
register (address 0C3H). User can use R0DD register when
its bit is 0 only. The control registers for R1 are shown be-
low.
R1 port also can use the value bit5 ~ bit0 of AIPS register
to secondary function register. R1 port have secondary
functions as following table.
Port R1 is multiplexed with various special features.The
control registers controls the selection of alternate func-
tion. After reset, this value is “0”, port may be used as nor-
mal input port. The way to select alternate function such as
comparator input will be shown in each peripheral section.
In addition, R1 port is used as key scan function which op-
erate with normal input port.
Input or output is configured automatically by each func-
tion register (KSMR) regardless of R1DD.
R2 Port
R2 is a 6-bit CMOS bidirectional I/O port (address 0C4H).
Each I/O pin can independently used as an input or an out-
put through the R2DD register (address 00C5H).The con-
trol registers for R2 are shown below.
R2 port also use the value bit5 ~ bit1 of FUNC register to
secondary function register. R2 port have secondary func-
R/W
R03
R/W
R02
R/W
R04
R/W
R06
R/W
R05
R/W
R07
R/W
R01
R/W
R00
ADDRESS : 00C0H
RESET VALUE : Undefined
R0 Data Register
R0
W
W
W
W
W
W
W
W
ADDRESS : 00C1H
RESET VALUE : 0000 0000b
R0 Direction Register
R0DD
Port Direction
0: Input
1: Output
R
R13
R
R12
R
R14
R
R
R
R
R11
R
R10
ADDRESS : 00C2H
RESET VALUE : Undefined
R1 Data Register
R1
W
W
W
W
-
W
-
W
-
W
W
ADDRESS : 00C3H
RESET VALUE : ---0 0000b
R1 Direction Register
R1DD
Port Direction
0 : use Input only
MSB
LSB
WWWWWW
WW
AIPS1
AIPS2
AIPS3
AIPS4
AIPS5
-
-
A IPS0
AIPS
INITIAL VALUE: --00 0000H
ADDRESS: 00EFH
AIPS.5 ~ AIPS.0
0 : R0 Port
1 : ADC Input
Port Pin
Alternate Function
R10
R11
R12
R13
R14
AN0 (A/D input 0)
AN1 (A/D input 1)
AN2 (A/D input 2)
AN3 (A/D input 3)
AN4 (A/D input 4)
R/W
R23
R/W
R22
R/W
R24
R/W
R/W
R25
R/W
R/W
R21
R/W
R20
ADDRESS : 00C4H
RESET VALUE : Undefined
R2 Data Register
R2
W
W
W
W
-
W
W
-
W
W
ADDRESS : 00C5H
RESET VALUE : 0000 0000b
R2 Direction Register
R2DD
Port Direction
0: Input
1: Output
INITIAL VALUE: 0000 0000b
ADDRESS: 00CEH
MSB
LSB
WWWWWW
WW
IN T 1S
IN T2S
IN T3S
EC 2S
EC 3S
-
-1
FUNC
FUNC.5 ~ FUNC.1
0 : R2 Port
1 : INT mode, EC mode
user m ust set 1


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