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): 28/115頁
文件大小: 846K
代理商: ALPHA 21164
28
Pinout and Signal Descriptions
21164 Signal Names and Functions
irq_h<3:0>
I
4
System interrupt requests. These signals have multiple modes
of operation. During normal operation, these level-sensitive
signals are used to signal interrupt requests. During initializa-
tion, these signals are used to set up the CPU cycle time divisor
for
sys_clk_out1_h,l
as follows:
mch_hlt_irq_h
I
1
Machine halt interrupt request. This signal has multiple modes
of operation. During initialization, this signal is used to set up
sys_clk_out2_h,l
delay. During normal operation, it is used to
signal a halt request.
oe_we_active_low_h
I
1
This signal provides the ability to control the polarity of the
offchip cache RAM control signals (
data_ram_ oe_h,
data_ram_we_h, tag_ram_oe_h,
and
tag_ram_we_h
). When
this signal is deasserted, the offchip cache signals are asserted
high. When this signal is asserted, the assertion levels of the
cache signals are inverted to a low level. This signal is defined
during power-up and
must
not change state during operation.
Table 2 21164 Signal Descriptions
(Sheet 9 of 12)
Signal
Type Count Description
irq_h<3> irq_h<2> irq_h<1> irq_h<0>
Ratio
Low
Low
High
High
3
Low
High
Low
Low
4
Low
High
Low
High
5
Low
High
High
Low
6
Low
High
High
High
7
High
Low
Low
Low
8
High
Low
Low
High
9
High
Low
High
Low
10
High
Low
High
High
11
High
High
Low
Low
12
High
High
Low
High
13
High
High
High
Low
14
High
High
High
High
15
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