参数资料
型号: SMC032BFY6E
厂商: NUMONYX
元件分类: PROM
英文描述: 4M X 8 FLASH 3.3V PROM CARD, 300 ns, UUC50
封装: LEAD FREE, CARD-50
文件页数: 16/90页
文件大小: 1863K
代理商: SMC032BFY6E
SMCxxxBF
Command interface
5
Command interface
There are two types of bus cycles and timing sequences that occur in the PCMCIA type
interface, direct mapped I/O transfer and memory access. Two types of bus cycles are also
available in true IDE interface type: PIO transfer and multi-word DMA transfer.
Figure 8 show the read and write timing diagrams.
In order to set the card mode, the -OE (-ATASEL) signal must be set and kept stable before
applying VCC until the reset phase is completed. To place the card in memory mode or I/O
mode, -OE(-ATASEL) must be driven High, while it must be driven Low to place the card in
true IDE mode.
5.1
Attribute memory read and write
Figure 2.
Attribute memory read waveforms
1.
DOUT signifies data provided by the CompactFlash memory card to the system. The -CE signal or both the -OE signal and
the -WE signal must be de-asserted between consecutive cycle operations.
AI10080
tc(R)
ta(A)
tv(A)
ta(CE)
ten(OE)
VALID
Address Inputs
D0 to D15 (DOUT)
VALID
–REG
–CE2/–CE1
–OE
tsu(A)
ten(CE)
tdis(OE)
tdis(CE)
ta(OE)
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