HD64570 HITACHI [Hitachi Semiconductor], HD64570 Datasheet - Page 65

• Manufacturer Part Number: HD64570
• Description: Serial Communications Adaptor
• Manufacturer: HITACHI [Hitachi Semiconductor]

Table 2.6
Symbol
WAIT
CP-84
81
Bus Interface Lines (cont)
Pin Number
FP-88
8
Input/
Output
Input/
output
Description
Wait: Used to extend read and write cycles.
CPU mode 0
Master mode
Slave mode
Reset mode
System stop
mode
CPU modes 1, 2, 3
Master mode
Slave mode
Reset mode
System stop
mode
If this line is high at the rising
edge of a T
inserted. If the line is still high
at the rising edge of the next
T
inserted. If this line is low at
the rising edge of a T
state, the next state is a T
state.
Output line. This line is driven
high to request the host MPU
to extend the bus cycle.
High output.
High output.
If this line is high at the falling
edge of a T
inserted. If the line is still high
at the falling edge of the next
T
inserted. If this line is low at
the falling edge of a T
state, the next state is a T
state.
Output line. This line is driven
high to request the host MPU
to extend the bus cycle.
High output.
High output.
W
W
Rev. 0, 07/98, page 49 of 453
state, another T
state, another T
2
2
state, a T
state, a T
W
W
state is
state is
2
2
W
W
or TW
or T
state is
state is
3
3
W