Z8018100ZCO Zilog, Z8018100ZCO Datasheet - Page 10
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Z8018100ZCO
Manufacturer Part Number
Z8018100ZCO
Description
Z80181 SAC APPLICATION BOARD
Manufacturer
Zilog
Datasheet
1.Z8018110FEG.pdf
(74 pages)
Specifications of Z8018100ZCO
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
Z8018100ZC0
Z8018100ZC0
Z8018100ZC0
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Zilog
SYSTEM CONTROL SIGNALS
Pin Name
ST
2-10
Pin Number
3
Input/Output, Tri-State
Out, Active 1
PS009701-0301
Function
Status. This signal is used with the /M1 and /HALT output
to decode the status of the CPU machine cycle. Note that
the /M1 output is affected by the status of the M1E bit in the
OMCR register. The following table shows
the status while M1E=1.
ST
0
1
1
0
0
1
/HALT
1
1
1
X
0
0
/M1
0
0
1
1
0
1
Operation
CPU Operation
(1st Opcode fetch)
CPU Operation
(2nd and 3rd Opcode fetch)
CPU Operation
(MC other than Opcode fetch)
DMA operation
HALT mode
SLEEP mode
(Incl. System STOP mode)
S
MART
A
CCESS
C
DS971800500
ONTROLLER
Z80181
SAC
™
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