X24F128 Datasheet, PDF (6/16 Pages) Xicor Inc. – 2-Wire SerialFlash with Block Lock TM Protection

X24F128
PROGRAMMING OPERATIONS
Sector Program Operation
The device executes a thirty-two byte sector program
operation. For a sector program operation, the device
requires the Slave Address Byte, Address Byte 1, and
Address Byte 0. Address Byte 0 must contain the first
byte of the sector to be programmed. Upon receipt of
Address Byte 0, the device responds with an acknowl-
edge, and waits for the first eight bits of data. After
receiving the 8 bits of the first data byte, the device
again responds with an acknowledge. The device will
respond with an acknowledge after the receipt of each
of 31 more bytes. Each time the byte address is inter-
nally incremented by one, while the sector address
remains constant. When the counter reaches the end
of the sector, the master terminates the data loading
by issuing a stop condition, which causes the device to
begin the nonvolatile write cycle. All inputs are
disabled until completion of the nonvolatile write cycle.
The SDA pin is at high impedance. Refer to figure 5 for
the address, acknowledge, and data transfer
sequence.
Figure 5. Sector Program Sequence
SIGNALS
FROM THE
MASTER
SDA BUS
S
T
SLAVE
A _ADDRESS
R
T
S1010
0
ADDRESS
BYTE 1
ADDRESS
BYTE 0
DATA
(1)
DATA
S
(32)
T
O
P
P
SIGNALS
FROM THE
SLAVE
A
A
A
A
A
C
C
C
C
C
K
K
K
K
K
7012 ILL F08.1
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