AK6516C Datasheet, PDF (6/17 Pages) Asahi Kasei Microsystems – SPI bus 256Kbit Serial CMOS EEPROM

ASAHI KASEI
[AK6516C]
RDSR (READ STATUS REGISTER)
The RDSR function is used to read the data in the STATUS register. The STATUS register has
RDY bit, WEN bit, BP0/BP1 bit and WPEN bit. RDSR function can be used to read READY/BUSY
status bit, WRITE ENABLE/DISABLE bit, and BLOCK PROTECT bit.
These bits can be set by WRSR function.
CS
SCK
SI
SO
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14
00 0 0X1 0 1
Hi-Z
Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
X = don’t care
RDSR
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
WPEN
X
X
X
BP1
BP0
WEN
RDY
Register
WPEN
BP0 / BP1
WEN
RDY
Definition
WP pin set bit (programmable)
See Table 3.
Block Protect bit for EEPROM memory array (programmable)
See Table 4.
WRITE ENABLE / DISABLE bit (READ only)
This is set by WREN/WRDI function.
WEN=0 : WRITE DISABLE
WEN=1 : WRITE ENABLE
READY/BUSY status bit (READ only)
RDY=0 : READY
RDY=1 : BUSY
Table 2. Status Register Configuration
DAP05E-00
-6-
2005/03