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MCP79522 데이터시트(PDF) 39 Page - Microchip Technology

부품명 MCP79522
상세설명  Battery-Backed SPI Real-Time Clock/Calendar
PDF  58 Pages
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제조업체  MICROCHIP [Microchip Technology]
홈페이지  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MCP79522 데이터시트(HTML) 39 Page - Microchip Technology

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 2012-2022 Microchip Technology Inc. and its subsidiaries
DS20002300D-page 39
MCP7951X/MCP7952X
FIGURE 6-4:
WRITE STATUS REGISTER SEQUENCE
6.2.2
STATUS REGISTER READ
SEQUENCE
The Read Status Register instruction (SRREAD)
provides access to the STATUS register. The STATUS
register may be read at any time, even during a write
cycle. This allows the user to poll the WIP bit to
determine when a write cycle is complete.
The device is selected by pulling CS low. The 8-bit
SRREAD instruction is transmitted to the MCP795XX.
The STATUS register value is then shifted out on the
SO pin. The read operation is terminated by driving CS
high (Figure 6-5).
FIGURE 6-5:
READ STATUS REGISTER SEQUENCE
SO
SI
CS
9
1011
12131415
01
0
0
0
0
00
7654
21
0
Instruction
Data to STATUS Register
High-Impedance
SCK
0
234
567
1
8
3
SO
SI
CS
9
1011
12131415
11
0
0
0
0
00
76
5
4
2
1
0
Instruction
Data from STATUS Register
High-Impedance
SCK
0
234
567
1
8
3



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