参数资料
型号: M95256-RDW3/A
厂商: STMICROELECTRONICS
元件分类: PROM
英文描述: 32K X 8 SPI BUS SERIAL EEPROM, PDSO8
封装: 0.169 INCH, TSSOP-8
文件页数: 13/43页
文件大小: 431K
代理商: M95256-RDW3/A
Instructions
M95256, M95256-W, M95256-R
5.5
Read from Memory Array (READ)
As shown in Figure 9, to send this instruction to the device, Chip Select (S) is first driven
Low. The bits of the instruction byte and address bytes are then shifted in, on Serial Data
Input (D). The address is loaded into an internal address register, and the byte of data at
that address is shifted out, on Serial Data Output (Q).
If Chip Select (S) continues to be driven Low, the internal address register is automatically
incremented, and the byte of data at the new address is shifted out.
When the highest address is reached, the address counter rolls over to zero, allowing the
Read cycle to be continued indefinitely. The whole memory can, therefore, be read with a
single READ instruction.
The Read cycle is terminated by driving Chip Select (S) High. The rising edge of the Chip
Select (S) signal can occur at any time during the cycle.
The first byte addressed can be any byte within any page.
The instruction is not accepted, and is not executed, if a Write cycle is currently in progress.
Figure 9.
Read from Memory Array (READ) Sequence
1.
The most significant address bit (b15) is Don’t Care.
C
D
AI01793D
S
Q
15
2
1
3456789 10
20 21 22 23 24 25 26 27
14 13
3210
28 29 30
76543
1
7
0
High Impedance
Data Out 1
Instruction
16-Bit Address
0
MSB
2
31
Data Out 2
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