Datasheet
2008-2011 Microchip Technology Inc. DS22100F-page 7
23A256/23K256
FIGURE 2-1: BYTE READ SEQUENCE
FIGURE 2-2: BYTE WRITE SEQUENCE
TABLE 2-1: INSTRUCTION SET
Instruction Name Instruction Format Description
READ
0000 0011
Read data from memory array beginning at selected address
WRITE
0000 0010
Write data to memory array beginning at selected address
RDSR
0000 0101
Read STATUS register
WRSR
0000 0001
Write STATUS register
SO
SI
SCK
CS
0 234567891011 21222324252627282930311
0100000115 14 13 12 210
76543210
Instruction 16-bit Address
Data Out
High-Impedance
SO
SI
CS
9 1011 2122232425262728293031
0000000115 14 13 12
21076543210
Instruction 16-bit Address Data Byte
High-Impedance
SCK
0 23456718