參數(shù)資料
型號： M30L0T8000B0ZAQE
廠商： STMICROELECTRONICS
元件分類： PROM
英文描述： 16M X 16 FLASH 1.8V PROM, 85 ns, PBGA88
封裝： 8 X 10 MM, 0.80 MM PITCH, LEAD FREE, BGA-88
文件頁數(shù)： 43/103頁
文件大小： 794K
代理商： M30L0T8000B0ZAQE
Read modes
M30L0T8000T0, M30L0T8000B0
7.2
Synchronous Burst Read Mode
In Synchronous Burst Read mode the data is output in bursts synchronized with the clock. It
is possible to perform burst reads across bank boundaries.
Synchronous Burst Read mode can only be used to read the memory array. For other read
operations, such as Read Status Register, Read CFI and Read Electronic Signature, Single
Synchronous Read or Asynchronous Random Access Read must be used.
In Synchronous Burst Read mode the flow of the data output depends on parameters that
are configured in the Configuration Register.
A burst sequence starts at the first clock edge (rising or falling depending on Valid Clock
Edge bit CR6 in the Configuration Register) after the falling edge of Latch Enable or Chip
Enable, whichever occurs last. Addresses are internally incremented and data is output on
each data cycle after a delay which depends on the X latency bits CR13-CR11 of the
Configuration Register.
The number of Words to be output during a Synchronous Burst Read operation can be
configured as 4 Words, 8 Words, 16 Words or Continuous (Burst Length bits CR2-CR0).
The data can be configured to remain valid for one or two clock cycles (Data Output
Configuration bit CR9).
The order of the data output can be modified through the Wrap Burst bit in the Configuration
Register. The burst sequence is sequential and can be confined inside the 4, 8 or 16 Word
boundary (Wrap) or overcome the boundary (No Wrap).
The WAIT signal may be asserted to indicate to the system that an output delay will occur.
This delay will depend on the starting address of the burst sequence and on the burst
configuration.
WAIT is asserted during the X latency, the WAIT state and at the end of a 4, 8 and 16 Word
burst. It is only de-asserted when output data are valid. In Continuous Burst Read mode a
WAIT state will occur when crossing the first 16 Word boundary. If the starting address is
aligned to the Burst Length (4, 8 or 16 Words) the wrapped configuration has no impact on
the output sequence.
The WAIT signal can be configured to be active Low or active High by setting CR10 in the
Configuration Register.
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