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MCP98244 датащи(PDF) 36 Page - Microchip Technology

номер детали MCP98244
подробное описание детали  DDR4 DIMM Temperature Sensor with EEPROM for SPD
PDF  52 Pages
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производитель  MICROCHIP [Microchip Technology]
домашняя страница  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MCP98244 датащи(HTML) 36 Page - Microchip Technology

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MCP98244
DS22327C-page 36
 2012-2013 Microchip Technology Inc.
5.3.5
READ OPERATION
Read operations are initiated in the same way as write
operations, with the exception that the R/W bit of the
slave address is set to ‘1’. There are three basic types
of read operations: current address read, random read
and sequential read.
5.3.5.1
Current Address Read
The MCP98244 contains an address counter that
maintains the address of the last word accessed,
internally incremented by ‘1’. Therefore, if the previous
access (either a read or write operation) was to
address n, the next current address read operation
would access data from address n+1. Upon receipt of
the slave address with R/W bit set to ‘1’, the MCP98244
issues an acknowledge and transmits the 8-bit data
word. The master will not acknowledge (NAK) the
transfer but does generate a Stop condition and the
MCP98244 discontinues transmission (Figure 5-14).
FIGURE 5-14:
Reading Current Word Address (See Section 4.0 “Serial Communication”).
10
1
0
A
A
C
K
N
A
K
S
P
2
A
1
A
0
12
3
4
5
6
7
8
12
34
567
8
Address Byte
Current Word Address
R
MCP98244
Master
SDA
SCL
00
0
0
0
00
0
Note:
In this example, the current word address is the
previously accessed address location n plus 1.



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