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11AA02UID 数据表(PDF) 9 Page - Microchip Technology

部件名 11AA02UID
功能描述  2K UNI/O짰 Serial EEPROM with Unique 32-Bit Serial Number
PDF  32 Pages
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制造商  MICROCHIP [Microchip Technology]
网页  http://www.microchip.com
标志 MICROCHIP - Microchip Technology

11AA02UID 数据表(HTML) 9 Page - Microchip Technology

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 2013 Microchip Technology Inc.
DS20005206A-page 9
11AA02UID
4.0
DEVICE COMMANDS
After the device address byte, a command byte must
be sent by the master to indicate the type of operation
to be performed. The code for each instruction is listed
in Table 4-1.
TABLE 4-1:
INSTRUCTION SET
4.1
Read Instruction
The Read command allows the master to access any
memory location in a random manner. After the
READ
instruction has been sent to the slave, the two bytes of
the Word Address are transmitted, with an Acknowl-
edge sequence being performed after each byte. Then,
the slave sends the first data byte to the master. If more
data is to be read, the master sends a MAK, indicating
that the slave should output the next data byte. This
continues until the master sends a NoMAK, which ends
the operation.
To provide sequential reads in this manner, the
11AA02UID contains an internal Address Pointer which
is incremented by one after the transmission of each
byte. This Address Pointer allows the entire memory
contents to be serially read during one operation. When
the highest address is reached, the Address Pointer
rolls over to address ‘0x00’ if the master chooses to
continue the operation by providing a MAK.
FIGURE 4-1:
READ COMMAND SEQUENCE
Instruction Name
Instruction Code
Hex Code
Description
READ
0000 0011
0x03
Read data from memory array beginning at specified address
CRRD
0000 0110
0x06
Read data from current location in memory array
WRITE
0110 1100
0x6C
Write data to memory array beginning at specified address
WREN
1001 0110
0x96
Set the write enable latch (enable write operations)
WRDI
1001 0001
0x91
Reset the write enable latch (disable write operations)
RDSR
0000 0101
0x05
Read STATUS register
WRSR
0110 1110
0x6E
Write STATUS register
ERAL
0110 1101
0x6D
Write ‘
0x00’ to entire array
SETAL
0110 0111
0x67
Write ‘
0xFF’ to entire array
76 5 4
Data Byte 1
32 1 0
76 5 4
Data Byte 2
32 1 0
76 5 4
Data Byte n
32 1 0
SCIO
11
0
1
0
1
00
Start Header
SCIO
Device Address
00
0
0
1
0
10
Command
01
0
0
0
0
01
Standby Pulse
SCIO
15 14 13 12
Word Address MSB
11 10 9 8
76 5 4
Word Address LSB
32 1 0



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