CDP1802AC/3 Ver la hoja de datos (PDF) - Intersil
Número de pieza
componentes Descripción
Fabricante
CDP1802AC/3 Datasheet PDF : 27 Pages
| |||
CDP1802AC/3
TABLE 5. CONDITIONS ON DATA BUS AND MEMORY ADDRESS LINES DURING ALL MACHINE STATES (Continued)
STATE I N
SYMBOL
OPERATION
DATA
BUS
MEMORY
ADDRESS MRD
MWR
N
LINES
NOTES
S1
F8
LDl
MRP D; RP + 1 RP
MRP
RP
0
1
0
Fig. 6
9
ORl
MRP OR D D; RP + 1 RP
A
ANl
MRP AND D D; RP + 1 RP
B
XRl
MRP XOR D D; RP + 1 RP
C
ADl
MRP + D DF, D; RP + 1 RP
D
SDl
MRP - D DF, D; RP + 1 RP
F
SMl
D - MRP DF, D; RP +1 RP
E
SHL
MSB(D) DF; 0 LSB(D)
Float
RP
1
1
0
Fig. 4
S2
DMA IN
BUS MR0; R0 + 1 R0
Data from
R0
1
0
0
22, Fig. 10
I/O Device
DMAOUT
MR0 BUS; R0 + 1 R0
MR0
R0
0
1
0
22, Fig. 11
S3
INTERRUPT
X, P T; 0 lE, 1 P;
Float
RN
1
1
0
Fig. 12
2X
S1
LOAD
IDLE (CLEAR, WAlT = 0)
M(R0 - 1)
R0 - 1
0
1
0
21, Fig. 6
NOTES:
17. lE = 1, TPA, TPB suppressed, state = S1.
18. BUS = 0 for entire cycle.
19. Next state always S1.
20. Wait for DMA or INTERRUPT.
21. Suppress TPA, wait for DMA.
22. IN REQUEST has priority over OUT REQUEST.
23. See “Timing Waveforms” beginning on page 7 and Figures 3 through 12 for “Machine Cyle Timing Waveforms beginning on page 9.
Operating and Handling Considerations
Handling
All inputs and outputs of Intersil CMOS devices have a
network for electrostatic protection during handling.
Operating
OPERATING VOLTAGE
During operation near the maximum supply voltage limit care
should be taken to avoid or suppress power supply turn-on
and turn-off transients, power supply ripple, or ground noise;
any of these conditions must not cause VDD - VSS to exceed
the absolute maximum rating.
INPUT SIGNALS
To prevent damage to the input protection circuit, input
signals should never be greater than VDD nor less than VSS.
Input currents must not exceed 10mA even when the power
supply is off.
UNUSED INPUTS
A connection must be provided at every input terminal. All
unused input terminals must be connected to either VDD or
VSS, whichever is appropriate.
OUTPUT SHORT CIRCUITS
Shorting of outputs to VDD or VSS may damage CMOS
devices by exceeding the maximum device dissipation.
FN1441 Rev 3.00
October 17, 2008
Page 25 of 27
Share Link: 