IS80C286-20 Intersil, IS80C286-20 Datasheet - Page 49

• Manufacturer Part Number: IS80C286-20
• Description: IC CPU 16BIT 5V 20MHZ 68-PLCC
• Manufacturer: Intersil

Specifications of IS80C286-20

• Processor Type: 80C286 16-Bit
• Speed: 20MHz
• Voltage: 5V
• Mounting Type: Surface Mount
• Package / Case: 68-PLCC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Features: -

Waveforms
NOTES:
48. These signals may not be driven by the 80C286 during the time shown. The worst case in terms of latest float time is shown.
49. The data bus will be driven as shown if the cycle before T
50. The 80C286 puts its status pins in a high impedance logic one state during T
51. For HOLD request set up to HLDA, refer to Figure 29.
52. BHE and LOCK are driven at this time but will not become valid until T
53. The data bus will remain in a high impedance state if a read cycle is performed.
CYCLE TYPE
BHE, LOCK
COD/INTA
A
D
S1 • S0
23
15
HLDA
PCLK
M/IO,
CLK
CLK
- D
- A
BUS
0
0
,
V
V
CH
CL
(Continued)
(SEE NOTE 52)
16
12B
φ1
T
H
13
FIGURE 37. EXITING AND ENTERING HOLD
φ2
(SEE NOTE 53)
T
S
φ1
IF NPX TRANSFER
OR T
IF T
I
in the diagram was a write T
12A
80C286
S
I
(SEE NOTE 50)
(SEE NOTE 51)
49
VALID
14
φ2
S
.
H
VALID IF WRITE
.
φ1
C
T
(SEE NOTE 48)
.
I
15
15
15
(SEE NOTE 49)
φ2
15
16
φ1
(SEE NOTE 50)
T
H
φ2