BU9832GUL-W ROHM Co. Ltd., BU9832GUL-W Datasheet - Page 13

• Manufacturer Part Number: BU9832GUL-W
• Description: 1,024?8 Bit Electrically Erasable Prom
• Manufacturer: ROHM Co. Ltd.

5.WRSR (WRITE STATUS RESISTER)
CSB
SCK
SO
SI
the status register. Write protection is set by BP1 and BP0 bits.
the 15th clock and it of the 16th clock, the rising edge of CS initiates high voltage cycle, which
writes the data into non-volatile memory array, but the command is cancelled if CS is high
exceptthat period. It takes maximum 5ms in high voltage cycle (tE/W) as well as “Write”.Block
write protection is determined by BP1 and BP0 bits, which is selected from quarter, half and
the entire memory array. (See Table2 BLOCK WRITE PROTECTION.)
This “Write Status Register” command writes the data, two (BP1, BP0) of the eight bits, into
After CS goes low, Op.code of “Read Status Register” need to sent. Between the rising edgeof
Hi-Z
0
0
0
1
Fig.12 WRITE STATUS REGISTER WRITE CYCLE TIMING
0
2
0
3
0
4
0
5
0
6
1
REV. B
7
WPEN
Bit7
8
Bit6
*
9
Bit5
*
10
Bit4
*
11
BP1
Bit3
12
BP0
Bit2
13
Bit1
*
*=Don't care
14
Bit0
*
15
13/13