A80386DX16 Intel, A80386DX16 Datasheet - Page 45

• Manufacturer Part Number: A80386DX16
• Description: IC MPU 32-BIT 5V 16MHZ 132-PGA
• Manufacturer: Intel

Specifications of A80386DX16

• Processor Type: 386DX
• Features: 32-bit
• Speed: 16MHz
• Voltage: 5V
• Mounting Type: Surface Mount
• Package / Case: 132-PGA
• Family Name: Intel386 DX
• Device Core Size: 32b
• Frequency (max): 16MHz
• Supply Voltage 1 (typ): 5V
• Operating Supply Voltage (max): 5.25V
• Operating Supply Voltage (min): 4.75V
• Operating Temp Range: 0C to 85C
• Operating Temperature Classification: Commercial
• Mounting: Through Hole
• Pin Count: 132
• Package Type: PGA
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 807050

When operating in a Virtual 8086 Mode within the
Protected Mode the segment base limit and other
attributes within the segment cache registers are de-
fined as shown in Figure 4-13 For compatibility with
the 8086 architecture the base is set to sixteen
times the current selector value the limit is fixed at
Key
Y
N
0
1
2
3
U
Figure 4-13 Segment Descriptor Caches for Virtual 8086 Mode within Protected Mode
e
e
e
e
e
e
e
yes
no
privilege level 0
privilege level 1
privilege level 2
privilege level 3
expand up
(Segment Limit and Attributes are Fixed)
0000FFFFH and the attributes are fixed so as to
indicate the segment is present and fully usable The
virtual program executes at lowest privilege level
level 3 to allow trapping of all IOPL-sensitive in-
structions and level-0-only instructions
D
B
P
W
F
–
e
e
e
e
e
e
expand down
byte granularity
page granularity
push pop 16-bit words
push pop 32-bit dwords
does not apply to that segment cache register
Intel386
TM
DX MICROPROCESSOR
231630 –62
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