
Contents
iv
Figure 10.
Figure 11.
Figure 12.
TCK Waveform ........................................................................................................................30
Test Signal Timing Diagram .....................................................................................................31
Typical Loading Delay versus Load Capacitance under Worst-Case Conditions
for a Low-to-High Transition .....................................................................................................32
Typical Loading Delay versus Load Capacitance under Worst-Case Conditions
for a High-to-Low Transition .....................................................................................................32
Package Mechanical Specifications for the 176 Lead TQFP Package ....................................33
Figure 13.
Figure 14.
TABLES
Table 1.
Table 2.
Table 3.
The Embedded Ultra-Low Power Intel486
SX Processor .......................................................2
Pin Assignment for 176-Lead TQFP Package Embedded ULP Intel486 SX Processor ........5
Pin Cross Reference for 176-Lead TQFP Package Embedded ULP
Intel486 SX Processor ............................................................................................................6
Embedded ULP Intel486 SX Processor Pin Descriptions ......................................................7
Output Pins ..............................................................................................................................12
Input/Output Pins .....................................................................................................................13
Test Pins ..................................................................................................................................13
Input Pins .................................................................................................................................14
CPUID Instruction Description .................................................................................................19
Boundary Scan Component Identification Code ......................................................................21
Absolute Maximum Ratings .....................................................................................................22
Operating Supply Voltages ......................................................................................................22
DC Specifications .....................................................................................................................23
Active I
CC
Values .....................................................................................................................24
Clock Stop, Stop Grant, and Auto HALT Power Down I
CC
Values ..........................................24
AC Characteristics ...................................................................................................................25
AC Specifications for the Test Access Port .............................................................................27
Thermal Resistance .................................................................................................................34
Maximum Ambient Temperature (T
A
) ......................................................................................34
Table 4.
Table 5.
Table 6.
Table 7.
Table 8.
Table 9.
Table 10.
Table 11.
Table 12.
Table 13.
Table 14.
Table 15.
Table 16.
Table 17.
Table 18.
Table 19.