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參數(shù)資料
| 型號(hào)： | AMDK86 |
| 英文描述： | AMD K86 - AMD K86 Family BIOS and Software Tools Developers Guide |
| 中文描述： | AMD的K86 - AMD的K86系列BIOS和軟件工具開(kāi)發(fā)人員指南 |
| 文件頁(yè)數(shù)： | 57/144頁(yè) |
| 文件大小： | 2179K |
| 代理商： | AMDK86 |
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AMD-K5 Processor
45
21062E/0—June 1997
AMD K86 Family BIOS and Software Tools Developers Guide
Preliminary Information
Output cells determine the value of the signal driven on the
corresponding pin. Input cells only capture data. The EXTEST
and SAMPLE/PRELOAD instructions can operate the BSR.
Device Identification Register.
The format of the Device
Identification Register (DIR) is shown in Table 15. The fields
include the following values:
I
Version Number
—This field is incremented by AMD
manufacturing for each major revision of silicon.
Bond Option
—The two bits of the bond option depend on
how the part is bonded at the factory.
Part Number
—This field identifies the specific processor
model.
Manufacturer
—This field is actually only 11 bits (11–1). The
least-significant bit, bit 0, is always set to 1, as specified by
the IEEE standard.
I
I
I
Bypass Register.
The Bypass Register, a 1-bit shift register,
provides the shortest path between TDI and TDO. When the
component is not performing a test operation, this path is
selected to allow transfer of test data to and from other
components on the board. The Bypass Register is also selected
during the HIGHZ, ALL1, ALL0, and BYPASS tests and for any
unused instruction codes.
Public Instructions
The processor supports all three IEEE-mandatory instructions
(BYPASS, SAMPLE/PRELOAD, EXTEST), three IEEE-optional
instructions (IDCODE, HIGHZ, RUNBIST), and three
instructions unique to the AMD-K5 processor (ALL1, ALL0,
USEHDT). Table 16 shows the complete set of public TAP
instructions supported by the processor. The AMD-K5 also
implements several private manufacturing test instructions.
The IEEE standard describes the mandatory and optional
instructions. The ALL1 and ALL0 instructions simply force all
outputs and bidirectionals High or Low. The USEHDT
instruction is described on page 57. Any instruction encodings
not shown in Table 16 select the BYPASS instruction.
Table 15.
AMD-K5 Processor Device Identification Register
Version
(Bits 31–28)
0h
Bond Option
(Bits 27–26)
X0b
Part Number
(Bits 25–12)
051Xh
Manufacturer
(Bits 11–1)
00000000001b
LSB
(Bit 0)
1b
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