
GMS81508/16
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2.9. SERIAL I/O
The serial I/O is 8-bit clock synchronous type and consists of serial I/O register, serial I/O mode
register, clock selection circuit octal counter and control circuit.
SIOR
1 0
3 2
5 4
7 6
Sclk
Octal Counter
Control
Circuit
Internal Data BUS
Internal Data BUS
SM0
SM1
Srdy
Srdy0
Srdy In
2
MUX
PS5
PS4
PS3
IFSIO
Exclk
R
Q
S
Sin
Sout
8
6
6
7
0
SIOM
SM0
SOSF
SIOST
SCK0
SCK1
Srdy
SM1