參數(shù)資料
型號： Alpha 21164
廠商： SAMSUNG SEMICONDUCTOR CO. LTD.
英文描述： Alpha Microprocessor(64位微處理器)
中文描述： 阿爾法微處理器（64位微處理器）
文件頁數(shù)： 31/115頁
文件大小： 846K
代理商： ALPHA 21164
Pinout and Signal Descriptions
31
21164 Signal Names and Functions
1
This signal is shown as bidirectional. However, for normal operation, it is input only. The output function is
used during manufacturing test and verification only.
tag_ram_oe_h
O
1
Tag RAM output enable. This signal is asserted during any
Bcache read operation.
tag_ram_we_h
O
1
Tag RAM write-enable. This signal is asserted during any tag
write operation. During the first CPU cycle of a write opera-
tion, the write pulse is deasserted. In the second and following
CPU cycles of a write operation, the write pulse is asserted if
the corresponding bit in the write pulse register is asserted. Bits
BC_WE_CTL<8:0> control the shape of the pulse.
tag_shared_h
B
1
Tag shared bit. During fills, the system should drive this signal
with the correct value to mark the cache block as shared.
tag_valid_h
B
1
Tag valid bit. During fills, this signal is asserted to indicate that
the block has valid data.
tck_h
I
1
JTAG boundary-scan clock.
tdi_h
I
1
JTAG serial boundary-scan data-in signal.
tdo_h
O
1
JTAG serial boundary-scan data-out signal.
temp_sense
I
1
Temperature sense. This signal is used to measure the die tem-
perature and is for manufacturing use only. For normal opera-
tion, this signal must be left disconnected.
test_status_h<1:0>
O
2
Icache test status. These signals are used for manufacturing test
purposes only to extract Icache test status information from the
chip.
test_status_h<0>
is asserted if ICSR<39> is true, on
IDU timeout, or remains asserted if the Icache built-in self-test
(BiSt) fails. Also,
test_status_h<0>
outputs the value written
by PALcode to
test_status_h<1>
through IPR access.
tms_h
trst_l
1
I
1
JTAG test mode select signal.
B
1
JTAG test access port (TAP) reset signal.
victim_pending_h
O
1
Victim pending. When asserted, this signal indicates that the
current read miss has generated a victim.
Table 2 21164 Signal Descriptions
(Sheet 12 of 12)
Signal
Type Count Description
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