HN58X2502IAG RENESAS [Renesas Technology Corp], HN58X2502IAG Datasheet - Page 11
HN58X2502IAG
Manufacturer Part Number
HN58X2502IAG
Description
Serial Peripheral Interface Electrically Erasable and Programmable Read Only Memory
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HN58X2502IAG.pdf
(22 pages)
HN58X2502IAG/HN58X2504IAG
Write Disable (WRDI):
One way of resetting the Write Enable Latch (WEL) bit is to send a Write Disable instruction to the device. As shown
in the following figure, to send this instruction to the device, chip select (S) is driven low, and the bits of the instruction
byte are shifted in, on serial data input (D).
The device then enters a wait state. It waits for the device to be deselected, by chip select (S) being driven high. The
Write Enable Latch (WEL) bit, in fact, becomes reset by any of the following events:
Write Disable (WRDI) Sequence
Rev.1.00, Nov.16.2006, page 11 of 20
Power-up
WRDI instruction execution
WRSR instruction completion
WRITE instruction completion
WRITE protect (W) is driven low
W
Q
C
D
S
V
V
V
V
V
V
V
V
IH
IL
IH
IL
IH
IL
IH
IL
0
1
2
Instruction
High-Z
3
4
5
6
7