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GMS81C5108
8
JUNE 2001 Ver 1.0
6. PORT STRUCTURES
R00~R03/INT0~INT2, R03/EC0, R07/SI
R04/BUZ, R06/SO
R05/SCK
R10~R17/KS0~KS7
R20~R23/AN0~AN3
Pin
Data Reg.
Dir. Reg.
Noise
Canceller
IN T0 ~ IN T2
P u ll up
R e g.
M U X
RD
V
DD
V
SS
Pull-up Tr.
EC0,SI
Open Drain
Reg.
RD
Da
ta
B
u
s
PMR<0:3,7>
Pin
Data Reg.
Dir. Reg.
Pull up
Reg.
M U X
RD
V
DD
V
SS
Pull-up Tr.
Open Drain
Reg.
BUZ,SO
RD
Da
ta
Bu
s
Pin
Data Reg.
Dir. Reg.
Pull up
Reg.
M U X
RD
V
DD
V
SS
Pull-up Tr.
Open Drain
Reg.
SCK(OUT)
Noise
Canceller
SCK(IN)
RD
Da
ta
Bu
s
SCK(IN)_EN
Pin
Data Reg.
Dir. Reg.
P ull up
R eg .
M U X
RD
V
DD
V
SS
Pull-up Tr.
Open Drain
Reg.
Key Scan
Key Scan
Enable
KS0 ~ KS7
Noise
Canceller
RD
D
a
ta
B
u
s
KSMR<0:7>
Pin
Data Reg.
Dir. Reg.
P u ll up
R e g.
M U X
RD
V
DD
V
SS
Pull-up Tr.
Open Drain
Reg.
A/D converter
AN0 ~ AN3
A/D Enable
channel select
RD
Da
ta
Bu
s
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