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MCP79521 Scheda tecnica(PDF) 37 Page - Microchip Technology

Il numero della parte MCP79521
Spiegazioni elettronici  Battery-Backed SPI Real-Time Clock/Calendar
PDF  58 Pages
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Produttore elettronici  MICROCHIP [Microchip Technology]
Homepage  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MCP79521 Scheda tecnica(HTML) 37 Page - Microchip Technology

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 2012-2022 Microchip Technology Inc. and its subsidiaries
DS20002300D-page 37
MCP7951X/MCP7952X
FIGURE 6-2:
SRAM/RTCC READ SEQUENCE
6.1.3
CLEAR SRAM INSTRUCTION
The CLRRAM instruction can be used to quickly clear
the contents of SRAM to 0x00. The RTCC registers are
not affected.
The device is selected by pulling CS low. The 8-bit
CLRRAM instruction is transmitted to the MCP795XX
followed by an 8-bit dummy data byte. CS is driven high
to end the operation (Figure 6-3). The value of the data
byte is ignored.
FIGURE 6-3:
CLEAR SRAM SEQUENCE
SO
SI
SCK
CS
0
23456789 10 11
1
01
0
1
0
0
01
A7 A6 A5 A4
A1 A0
76543210
Data Out
High-Impedance
A3 A2
Address Byte
12 13 14 15 16 17 18 19 20 21 22 23
Instruction
SO
SI
CS
9
1011
12131415
10
0
1
0
1
00
76
5
4
21
0
Instruction
Dummy Data Byte
High-Impedance
SCK
0
234
567
1
8
3



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