參數(shù)資料
型號(hào): 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): 39/115頁
文件大?。?/td> 846K
代理商: ALPHA 21164
21164 Microprocessor Functional Overview
39
Board-Level Backup Cache Interface
5.2 Board-Level Backup Cache Interface
The 21164 includes an interface and control for an optional board-level backup
cache (Bcache). This section describes the Bcache interface. The Bcache interface is
made up of the following:
A data bus (which it shares with the system interface)
Tag and tag control bits for determining hit and coherence
SRAM output and SRAM write control signals
Figure 9 shows the 21164 system interface signals.
Figure 9 21164 Bcache Interface Signals
The Bcache interface is managed by the cache control and bus interface unit (CBU).
The Bcache interface is a 128-bit bidirectional data bus. The read and write speed of
the Bcache can be programmed independently of each other and independently of the
system clock ratio. Optionally, the Bcache can operate in a psuedo-pipeline manner.
Internal processor registers are used to program the Bcache timing and to enable
wave pipelining. See the
Alpha 21164 Microprocessor Hardware Reference Manual
for more information.
21164
data_check_h<15:0>
tag_dirty_h
data_ram_oe_h
tag_ctl_par_h
tag_data_h<38:20>
data_ram_we_h
data_h<127:0>
index_h<25:4>
tag_shared_h
tag_data_par_h
tag_ram_oe_h
tag_ram_we_h
tag_valid_h
big_drv_en_h
oe_we_active_low_h
st_clk1_h
st_clk2_h
LJ-05388.AI4
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