AMD-K6-2E/400AFR AMD [Advanced Micro Devices], AMD-K6-2E/400AFR Datasheet - Page 145

• Manufacturer Part Number: AMD-K6-2E/400AFR
• Manufacturer: AMD [Advanced Micro Devices]

22529B/0—January 2000
5.52
Pin Attribute
Pin Location
Summary
Driven
Chapter 5
VCC2H/L# (VCC2 High/Low)
Output
AN-05
VCC2H/L# is internally tied to V
the system logic that it must supply the specified processor core
voltage to the V
processor core, independent of the voltage supplied to the I/O
buffers on the V
Upon sampling VCC2DET Low to identify dual-voltage
processor requirements, system logic should sample VCC2H/L#
to identify the core voltage requirements for 2.9 V and 3.2 V
products (High) or 2.4 V, 2.2 V, and 1.9 V products (Low).
VCC2H/L# always equals 0 and is never floated for 2.4 V, 2.2 V,
and 1.9 V products—even during the three-state test mode. To
ensure proper operation for 2.9 V and 3.2 V products, system
logic that samples VCC2H/L# should design a weak pullup
resistor for this signal.
The output pin float conditions for VCC2DET and VCC2H/L#
are listed in Table 17.
Table 17. Output Pin Float Conditions
Notes:
1. All outputs except VCC2DET, VCC2H/L#, and TDO float during the three-state test mode.
VCC2DET
VCC2H/L#
Name
1
Signal Descriptions
CC3
CC2
pins.
pins. The V
CC2
SS
AMD-K6™-2E Processor Data Sheet
(logic level 0) to indicate to
pins supply voltage to the
Always Driven
Always Driven
Floated At:
127