Z8S18020FEC Zilog, Z8S18020FEC Datasheet - Page 18

• Manufacturer Part Number: Z8S18020FEC
• Description: IC Z180 MPU 80-QFP
• Manufacturer: Zilog

Specifications of Z8S18020FEC

• Processor Type: Z180
• Features: Enhanced Z180
• Speed: 20MHz
• Voltage: 5V
• Mounting Type: Surface Mount
• Package / Case: 80-BQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 269-3103

porary assertion of the
a
When
peripheral(s), those same device(s) may require a pulse on
the function being programmed.
When
as the Z64180 (Figure 11).
1
after programming certain of their registers to complete
and is set to
and
=
is set to
1
signals. The bit is set to
, the
1
0
during
to accommodate certain external Z80
and
This bit controls the timing of the
signal. It is always read back as
signals function the same
This bit controls the tem-
.
1
by
.
For example, when a control word is written to the Z80 PIO
to enable interrupts, no enable actually takes place until the
PIO sees an active
change in the operation of the
its function. When
ing the next opcode fetch cycle regardless of the state pro-
grammed into the
tary (one time) and it is not necessary to preprogram a
to disable the function (see Figure 10).
signal. When
bit. This condition is only momen-
=
0
, the
signal, and
output is asserted dur-
=
1
, there is no
controls
ZiLOG
1