25lc020a Microchip Technology Inc., 25lc020a Datasheet - Page 7

• Manufacturer Part Number: 25lc020a
• Description: 2k Spi Bus Serial Eeprom
• Manufacturer: Microchip Technology Inc.

BLOCK DIAGRAM
TABLE 2-1:
FIGURE 2-1:
© 2007 Microchip Technology Inc.
x = don’t care
HOLD
Instruction Name
SCK
WP
SO
CS
SCK
SI
CS
SO
SI
WRITE
I/O Control
READ
WRDI
WREN
RDSR
WRSR
STATUS
Register
Logic
0
0
1
0
INSTRUCTION SET
V
V
0
CC
2
SS
Instruction
READ SEQUENCE
Memory
Control
Logic
3
0
Instruction Format
0
4
0000 x011
0000 x010
0000 x100
0000 x110
0000 x101
0000 x001
Dec
5
0
X
High-Impedance
6
1
Sense Amp.
R/W Control
Y Decoder
HV Generator
Page Latches
1
7
EEPROM
A
Array
8
7
A
9 10 11
6
Read data from memory array beginning at selected address
Write data to memory array beginning at selected address
Reset the write enable latch (disable write operations)
Set the write enable latch (enable write operations)
Read STATUS register
Write STATUS register
Preliminary
A
Address Byte
5
A
4
12 13 14 15 16 17 18 19 20 21 22 23
A
25AA020A/25LC020A
3
A
2
A
1
A
0
Description
7
6
5
Data Out
4
3
2
DS21833D-page 7
1
0