- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄363666 > NSC800 (National Semiconductor Corporation) NSC800TM High-Performance Low-Power CMOS Microprocessor PDF資料下載
參數(shù)資料
| 型號： | NSC800 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | NSC800TM High-Performance Low-Power CMOS Microprocessor |
| 中文描述： | NSC800TM高性能低功耗CMOS微處理器 |
| 文件頁數(shù)： | 16/76頁 |
| 文件大?。?/td> | 785K |
| 代理商： | NSC800 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁當(dāng)前第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁
9.0 Timing and Control
(Continued)
9.2 CPU TIMING
The NSC800 uses a multiplexed bus for data and address-
es. The 16-bit address bus is divided into a high-order 8-bit
address bus that handles bits 8–15 of the address, and a
low-order 8-bit multiplexed address/data bus that handles
bits 0–7 of the address and bits 0–7 of the data. Strobe
outputs from the NSC800 (ALE, RD and WR) indicate when
a valid address or data is present on the bus. IO/M indi-
cates whether the ensuing cycle accesses memory or I/O.
During an input or output instruction, the CPU duplicates the
lower half of the address
[
AD(0–7)
]
onto the upper address
bus
[
A(8–15)
]
. The eight bits of address will stay on A(8–
15) for the entire machine cycle and can be used for chip
selection directly.
Figure 9 illustrates the timing relationship for opcode fetch
cycles with and without a wait state.
TL/C/5171–15
FIGURE 9a. Opcode Fetch Cycles without WAIT States
TL/C/5171–16
FIGURE 9b. Opcode Fetch Cycles with WAIT States
16
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| NSC800D | NSC800TM High-Performance Low-Power CMOS Microprocessor |
| NSC800E | NSC800TM High-Performance Low-Power CMOS Microprocessor |
| NSC800N | NSC800TM High-Performance Low-Power CMOS Microprocessor |
| NSC800V | NSC800TM High-Performance Low-Power CMOS Microprocessor |
| NSC858 | NSC858 Universal Asynchronous Receiver/Transmitter |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| NSC800D | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:NSC800TM High-Performance Low-Power CMOS Microprocessor |
| NSC800D/883C | 制造商: 功能描述: 制造商:undefined 功能描述: |
| NSC800D/B | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| NSC800D-1I | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microprocessor |
| NSC800D-3 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microprocessor |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。