NG80386SX-33 AMD [Advanced Micro Devices], NG80386SX-33 Datasheet - Page 22

• Manufacturer Part Number: NG80386SX-33
• Description: High-Performance, Low-Power, Embedded Microprocessors
• Manufacturer: AMD [Advanced Micro Devices]

22
BHE, BLE, W/R,
CLK (Internal)
Notes:
1. BUSY should be held stable for eight CLK2 periods before and after the CLK2 period in which the RESET falling edge
2. If self-test is requested, the Am386SXLV microprocessor outputs remain in their reset state as shown here.
M/IO, HLDA
D/C, LOCK
occurs.
D15–D0
ERROR
A23–A1,
READY
BUSY
Reset
CLK2
ADS
SMI
NA
Figure 11. Bus Activity from Reset Until First Code Fetch (Am386SXLV Only)
Up to 30 CLK2
Up to 30 CLK2
Up to 30 CLK2
going to request self-test.
requesting self-test.
15 CLK2 duration if not
80 CLK2 duration before
Am386SX/SXL/SXLV Microprocessors Data Sheet
Low
High
High
Reset
(Note 1)
Low to begin self-test (Note 2)
During Reset
During Reset
During Reset
F I N A L
(Floating)
No self-test
Internal Initialization
1
2
If self-test is performed, add
(2
20
2
) + 60* to these numbers.
1
3
2
17
Negated to allow sensing of a
387DX math coprocessor
Asserted to indicate 387DX
math coprocessor protocol
1
18
2
19
1
395 396 397 398
*
2
*
Approximately
Non-Pipelined
1
*
T1
Valid 1
Valid 1
Cycle 1
(Read)
16305C–009
*
2
T2
*