AT45DB161D-SU-2.5 SL383 Atmel, AT45DB161D-SU-2.5 SL383 Datasheet - Page 17

• Manufacturer Part Number: AT45DB161D-SU-2.5 SL383
• Manufacturer: Atmel

Specifications of AT45DB161D-SU-2.5 SL383

• Density: 16Mb
• Access Time (max): 6ns
• Interface Type: Serial (SPI)
• Boot Type: Not Required
• Address Bus: 1b
• Operating Supply Voltage (typ): 3/3.3V
• Operating Temp Range: -40C to 85C
• Package Type: SOIC EIAJ
• Program/erase Volt (typ): 2.7 to 3.6V
• Sync/async: Synchronous
• Operating Temperature Classification: Industrial
• Operating Supply Voltage (min): 2.7V
• Operating Supply Voltage (max): 3.6V
• Supply Current: 15mA
• Mounting: Surface Mount
• Pin Count: 8
• Lead Free Status / Rohs Status: Compliant

3500N–DFLASH–05/10
10.1.1 Sector Lockdown Register
10.1.2 Reading the Sector Lockdown Register
Figure 10-2. Read Sector Lockdown Register
Sector Lockdown Register is a nonvolatile register that contains 16-bytes of data, as shown below:
Table 10-2.
Table 10-3.
The Sector Lockdown Register can be read to determine which sectors in the memory array are permanently
locked down. To read the Sector Lockdown Register, the CS pin must first be asserted. Once the CS pin has been
asserted, an opcode of 35H and three dummy bytes must be clocked into the device via the SI pin. After the last bit
of the opcode and dummy bytes have been clocked in, the data for the contents of the Sector Lockdown Register
will be clocked out on the SO pin. The first byte corresponds to sector 0 (0a, 0b) the second byte corresponds to
sector 1 and the las byte (byte 16) corresponds to sector 15. After the last byte of the Sector Lockdown Register
has been read, additional pulses on the SCK pin will simply result in undefined data being output on the SO pin.
Deasserting the CS pin will terminate the Read Sector Lockdown Register operation and put the SO pin into a
high-impedance state.
Table 10-4
Table 10-4.
Sector Number
Locked
Unlocked
Sectors 0a, 0b Unlocked
Sector 0a Locked (Page 0-7)
Sector 0b Locked (Page 8-255)
Sectors 0a, 0b Locked (Page 0-255)
Command
Read Sector Lockdown Register
Note:
CS
SO
SI
xx = Dummy Byte
Each transition
represents eight bits
details the values read from the Sector Lockdown Register.
Sector Lockdown Register
Sector 0 (0a, 0b)
Sector Lockdown Register
Opcode
X
(Page 0-7)
Bit 7, 6
X
0a
00
11
00
11
Byte 1
35H
See Below
0 (0a, 0b)
(Page 8-255)
X
Bit 5, 4
0b
00
00
11
11
Byte 2
Data Byte
xxH
n
Bit 3, 2
00
00
00
00
Data Byte
Byte 3
n + 1
xxH
Atmel AT45DB161D
Bit 1, 0
1 to 15
00
00
00
00
FFH
00H
Byte 4
xxH
Value
Data
C0H
F0H
00H
30H
Data Byte
n + 15
17