CD1865 Datasheet, PDF (150/150 Pages) Intel Corporation – Intelligent Eight-Channel Communications Controller

modem signal change 32, 35
receiving data 32, 88
transmit service requests 35
transmitting data 32, 87
types of 31
single interrupt 36, 39
software interface
choosing 26
interrupt-driven 26
polled 26
software polled 37
specification, electrical 127
state machine logic 29
system bus interface 46
system clock 46, 47
system interface considerations 47
T
theory of operation 10, 26
throughput limits, maximum 51
timing information, listing of 128
timings
clocked bus interface
clocks 131
read cycle, Intel-style handshake 134
read cycle, Motorola-style handshake
131
reset 130
service acknowledgment cycle, Intel-
style handshake 135
service acknowledgment cycle, Motor-
ola-style handshake 132
write cycle, Intel-style handshake 136
write cycle, Motorola-style handshake
133
unclocked bus interface
read cycle, Intel-style handshake 142
read cycle, Motorola-style handshake
139
service acknowledgment cycle, Intel-
style handshake 143
service acknowledgment cycle, Motor-
ola-style handshake 140
write cycle, Intel-style handshake 144
write cycle, Motorola-style handshake
141
transmit interrupt service 92
transmit service requests 35
transmitting data 87
U
unclocked bus interface 52, 53, 136
V
vectored interrupt structure 11
150
Datasheet