參數(shù)資料
型號(hào): μPDPD30101
廠商: NEC Corp.
英文描述: 64-Bit Micro[rocessor(64位微處理器)
中文描述: 64位微[rocessor(64位微處理器)
文件頁(yè)數(shù): 29/97頁(yè)
文件大小: 409K
代理商: ΜPDPD30101
μ
PD30101
28
3.7 Cache
(1) Instruction cache
The instruction cache has the following features:
Internal cache memory
Capacity: 2K bytes
Direct mapping mode
Virtual index address
Physical tag check
4-word (16-byte) cache line
Figure 3-13. Format of Instruction Cache
127
155 154
132 131
0
0
1
22
P
PTag
Data
128
V
153
128 127
DataP
4
1
PTag
V
Data
P
DataP
: Physical tag (bits 31-10 of physical address)
: Valid bit
: Cache data
: Even parity for physical tag and V bit
: Even parity for data (1-bit parity per 4-byte data)
(2) Data cache
The data cache has the following features:
Internal cache memory
Capacity: 1K bytes
Write back
Direct mapping mode
Virtual index address
Physical tag check
4-word (16-byte) cache line
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