AK6516C Datasheet, PDF (5/17 Pages) Asahi Kasei Microsystems – SPI bus 256Kbit Serial CMOS EEPROM

ASAHI KASEI
[AK6516C]
Function Description
AK6516C has six instructions. The instruction can be input after the CS pin changes high to low.
All the instructions are MSB first.
Instruction
READ
WRITE
WREN
WRDI
RDSR
WRSR
Op-code
0000 X011
0000 X010
0000 X110
0000 X100
0000 X101
0000 X001
Address
X A14-A8
A7-A0
X A14-A8
A7-A0
------
------
Bit7-Bit0 (out)
------
Bit7-Bit0 (in)
------
Data
D7-D0 (out)
D7-D0 (in)
------
------
------
------
Description
Read from Memory Array
Write to Memory Array
Write Enable
Write Disable
Read Status Register
Write Status Register
Table 1. Instruction set for AK6516C
X: don’t care
WREN (WRITE ENABLE) / WRDI (WRITE DISABLE)
The WRITE function can be accepted only in the status of Write Enable. After VCC is applied,
AK6516C is in the status of Write Disable. After the function of WRDI, AK6516C cannot accept any
programming function.
DAP05E-00
CS
SCK
SI
SO
01234567
00 0 0X1 1 0
Hi-Z
X = don’t care
WREN
CS
SCK
SI
SO
01234567
00 0 0X1 0 0
Hi-Z
X = don’t care
WRDI
-5-
2005/03