參數(shù)資料
型號: SPAK302FC25C
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 4 CHANNEL(S), 10M bps, LOCAL AREA NETWORK CONTROLLER, PQFP132
封裝: 0.950 X 0.950 INCH, 0.025 INCH PITCH, PLASTIC, QFP-132
文件頁數(shù): 48/128頁
文件大?。?/td> 641K
代理商: SPAK302FC25C
MC68EN302 Module Bus Controller
MOTOROLA
MC68EN302 REFERENCE MANUAL
2-9
2.9.1 Bus Cycle Timing
The 8-bit extension logic for dynamic sizing is programmable from -1 to 5 wait states, and
allows the external logic to terminate the cycle. Even word accesses are a special case
which require specific control operations to allow the device to provide two external bus
cycles. In some cases, the timing generated looks like two comparable 68000 cycles.There
are two exceptions to this. First, the -1 wait state timing is a special case, since the 68000
bus is defined as a minimum 4 clock bus. The second exception is the Fast Cycle case. The
-1 wait state case appears externally as two 16-bit 3 clock bus cycles. Figure 2-4 shows the
timing for the read case, while Figure 2-5 shows the timing for writes.
Figure 2-4. Word Read with 3-Clock 8-Bit Accesses
Figure 2-5. Word Write with 3-Clock 8-Bit Accesses
The fast cycle case differs from the normal cycle in that AS and chip select do not negate
between the first and second half of the 16-bit access, allowing the two bus cycles to be
S2
S3
S4
S5
S0
S1
CLOCK
S0
S1
S2
S3
S4
S5
ADDR23-1
ADDR0
AS/CS
RW
DATA
UDS/LDS
S2
S3
S4
S5
S0
S1
CLOCK
S0
S1
S2
S3
S4
S5
ADDR23-1
ADDR0
AS/CS
RW
DATA
UDS/LDS
相關(guān)PDF資料
PDF描述
MC68EN360EM25 7 CHANNEL(S), 10M bps, LOCAL AREA NETWORK CONTROLLER, PQFP240
MC68EN360FE33 RISC MICROCONTROLLER, CQFP240
MC68360RC25 RISC MICROCONTROLLER, CPGA241
MC68EN360RC25 RISC MICROCONTROLLER, CPGA241
MC68360FE25 32-BIT, 25 MHz, RISC PROCESSOR, CQFP240
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SPAK56854FG120 制造商:Freescale Semiconductor 功能描述:
SPAK56857BU120 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:120 MIPS Hybrid Processor
SPAK56F803BU80 制造商:Freescale Semiconductor 功能描述:
SPAK56F805FV80 制造商:Freescale Semiconductor 功能描述:
SPAKDSP303AG100 功能描述:數(shù)字信號處理器和控制器 - DSP, DSC SPAKDSP303AG100 RoHS:否 制造商:Microchip Technology 核心:dsPIC 數(shù)據(jù)總線寬度:16 bit 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:2 KB 最大時鐘頻率:40 MHz 可編程輸入/輸出端數(shù)量:35 定時器數(shù)量:3 設(shè)備每秒兆指令數(shù):50 MIPs 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-44 安裝風(fēng)格:SMD/SMT