S25FL016K0XMFI011 Spansion Inc., S25FL016K0XMFI011 Datasheet - Page 55

• Manufacturer Part Number: S25FL016K0XMFI011
• Description: MEMORY, FLASH, 16M, 3V, SPI, 8SOIC
• Manufacturer: Spansion Inc.

Specifications of S25FL016K0XMFI011

• Memory Size: 16Mbit
• Clock Frequency: 104MHz
• Supply Voltage Range: 2.7V To 3.6V
• Memory Case Style: SO
• No. Of Pins: 8
• Operating Temperature Range: -40°C To +85°C
• Interface: SPI
• Memory Type: RoHS Compliant
• Memory Configuration: 8K X 256 Bytes
• Interface Type: SPI
• Rohs Compliant: Yes

7.34
September 8, 2010 S25FL016K_00_02
Program Security Registers (42h)
The Program Security Register instruction is similar to the Page Program instruction. It allows from one byte
to 256 bytes of security register data to be programmed at previously erased (FFh) memory locations. A Write
Enable instruction must be executed before the device will accept the Program Security Register Instruction
(Status Register bit WEL= 1). The instruction is initiated by driving the CS# pin low then shifting the instruction
code “42h” followed by a 24-bit address (A23-A0) and at least one data byte, into the SI pin. The CS# pin
must be held low for the entire length of the instruction while data is being sent to the device.
The Program Security Register instruction sequence is shown in
(LB3-1) in the Status Register-2 can be used to OTP protect the security registers. Once a lock bit is set to 1,
the corresponding security register will be permanently locked, and a Program Security Register instruction to
that register will be ignored (see
(02h) on page 37
CLK
CLK
CS#
CS#
Security Register #1
Security Register #2
Security Register #3
SI
SI
Mode 3
Mode 0
Address
= MSB
D a t a
7
40
for detail descriptions).
6
41 42 43 44 45
0
5
S h e e t
Figure 7.38 Program Security Registers Instruction Sequence
1
Data Byte 2
4
Instruction (42h)
2
3
3
A23-16
2
Security Register Lock Bits (LB3, LB2, LB1) on page 15
00h
00h
00h
4
( P r e l i m i n a r y )
1
46 47 48
5
0
S25FL016K
6
7
7
6
49
23
8
5
50 51 52 53 54 55
22 21
9
0 0 0 1 b
0 0 1 0 b
0 0 1 1 b
Data Byte 3
A15-12
24-bit Address
4
10
3
2
28 29
3
1
Figure
2
1
0
30 31 32 33 34
7.38. The Security Register Lock Bits
0
0 0 0 0 b
0 0 0 0 b
0 0 0 0 b
7
A11-8
7
6
6
5
Data Byte 256
Data Byte 1
5
4
4
35 36 37 38 39
3
and
3
2
Byte Address
Byte Address
Byte Address
2
Page Program
1
A7-0
1
0
0
Mode 3
Mode 0
55