參數(shù)資料
型號: NS32FX100VF
廠商: National Semiconductor Corporation
英文描述: System Controller
中文描述: 系統(tǒng)控制器
文件頁數(shù): 54/94頁
文件大小: 955K
代理商: NS32FX100VF
3.0 System Interface
(Continued)
3.4 BUS CYCLES
Memory
NS32FX100 are almost identical. The transactions differ as
follows:
transactions
issued
by
the
CPU
and
the
1. During the CPU transactions, data is driven onto AD0–15
throughout T4, whereas, on DMA transactions by the
NS32FX100, data is not driven onto AD0–15 to the end
of T4.
2. The NS32FX100 does not drive HBE and address on
AD0–15 during T1.
3. The CPU drives ADS in T1. The NS32FX100 drives ADS
from Ti, preceding T1, through T1.
Read Transactions: WEi inactive; Only one SELi or RASi
active. Write Transactions: OE inactive; Only one SELi or
RASi active.
TL/EE/11331–35
FIGURE 3-3. Zones 0, 1 (ROM/SRAM) Read Transaction, Zero Wait State
TL/EE/11331–36
FIGURE 3-4. Zones 0, 1 (ROM/SRAM) Read Transaction, One Wait State
54
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