12
AMD-K5 Processor Data Sheet 18522F/0—Jan1997
PRELIMINARY INFORMATION
5 CPU Identification
Upon completion of RESET, the DX register contains a component identification.
The upper byte of DX (DH) will contain 05h. The lower byte of DX (DL) will contain
a CPU model (0h–2h)/stepping identifier (xh).
The boundary scan test access port (TAP) returns the following information in the
device identification register (DIR).
CPU ID
Family ID
(DH)
Model ID
(DL, top
4 bits)
CPU Frequency
(MHz)
Bus
Speed
Processor P-Rating
BF
Pin
BF1–BF0
Pins
5
0
75 50 AMD-K5-PR75 1 N/A
90 60 AMD-K5-PR90 1 N/A
100 66 AMD-K5-PR100 1 N/A
1
90 60 AMD-K5-PR120 N/A 10
100 66 AMD-K5-PR133 N/A 10
2 116.7 66 AMD-K5-PR166 N/A 00
Notes:
This table does not constitute product announcements. Instead, the information in the table represents possible prod-
uct offerings. AMD will announce actual products based on availability and market demand
JTAG ID Code
Version
(Bits 31–28)
Bond Option
(Bit 27)
Unused
(Bits 26–24)
Part Number
(Bits 23–12)
Manufacturer
(Bits 11–1)
LSB
(Bit 0)
xh xb 000b
50xh (Model 0)
51xh (Model 1)
52xh (Model 2)
00000000001b 1b
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