1.0 System Description
CN8478/CN8474A/CN8472A/CN8471A
1.1 Pin Descriptions
Multichannel Synchronous Communications Controller (MUSYCC™)
Table 1-3. I/O Pin Types
I/O
Definition
I
Input. High impedance, TTL.
Output. CMOS.
O
I/O
t/s
s/t/s
Input/Output. TTL input/CMOS output.
Three-state. Bidirectional three-state I/O pin.
Sustained three-state. This is an active-low, three-state signal owned by only one driver at a time. The driver
that drives an s/t/s signal low must drive it high for at least one clock cycle before allowing it to float. A pullup
is required to sustain the deaserted value.
o/d
Open drain.
NOTE(S): All outputs are CMOS drive levels and can be used with CMOS or TTL logic.
1-18
Conexant
100660E
CONEXANT [ CONEXANT SYSTEMS, INC ]
