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48LM01 데이터시트(PDF) 17 Page - Microchip Technology

부품명 48LM01
상세설명  512-Kbit/1-Mbit SPI Serial EERAM
PDF  40 Pages
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제조업체  MICROCHIP [Microchip Technology]
홈페이지  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

48LM01 데이터시트(HTML) 17 Page - Microchip Technology

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 2018-2019 Microchip Technology Inc.
DS20006008C-page 17
48L512/48LM01
7.0
READ OPERATIONS
7.1
Reading from the SRAM (READ)
Reading the SRAM contents can be done whenever
the device is not in an internal store or recall cycle, as
indicated by the Ready/Busy bit of the STATUS
register. To read the SRAM, first the CS line is pulled
low to select the device and the Read opcode 03h is
transmitted via the SI line followed by the 16- or 24-bit
address to be read.
Upon completion of the address bytes, any data on the
SI line will be ignored. The data (D7–D0) at the
specified address is then shifted out onto the SO line.
Any number of bytes can be clocked out, and if the
address reaches the end of the array, it can continue at
the beginning of the array. Read operations are not
limited by page boundaries.
The read sequence can be terminated at any point of
the operation. The CS line should be driven high after
the data is clocked out.
FIGURE 7-1:
READ SRAM (READ) WAVEFORM
CS
SCK
1
02 3 4
5 6
00
0
0
0
01
1
READ Opcode
Address Bits (24/16)
AA A A A
SI
D7
Data Byte
SO
MSb
MSb
MSb
High-Impedance
AAA
7
D6 D5 D4 D3 D2 D1 D0



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