AT49F2048-90TC 데이터 시트보기 (PDF) - Atmel Corporation
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AT49F2048-90TC Datasheet PDF : 11 Pages
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(typical), the program function is inhibited. (b) VCC power
on delay: once VCC has reached the VCC sense level, the
device will automatically time out 10 ms (typical) before
programming. (c) Program inhibit: holding any one of OE
low, CE high or WE high inhibits program cycles. (d) Noise
filter: pulses of less than 15 ns (typical) on the WE or CE
inputs will not initiate a program cycle.
Command Definition (in Hex)(1)
Command
Sequence
Bus
Cycles
1st Bus
Cycle
Addr Data
2nd Bus
Cycle
Addr Data
3rd Bus
Cycle
Addr Data
4th Bus
Cycle
Addr Data
5th Bus
Cycle
Addr Data
6th Bus
Cycle
Addr Data
Read
Chip Erase
Sector Erase
1
Addr DOUT
6
5555 AA 2AAA 55 5555 80 5555 AA 2AAA 55
5555
10
6
5555 AA 2AAA 55 5555 80 5555 AA 2AAA 55 SA(4)(5) 30
Word Program
Boot Block
Lockout(2)
4
5555 AA 2AAA 55 5555 A0 Addr DIN
6
5555 AA 2AAA 55 5555 80 5555 AA 2AAA 55
5555
40
Product ID
Entry
3
5555 AA 2AAA 55 5555 90
Product ID
Exit(3)
3
5555 AA 2AAA 55 5555 F0
Product ID
Exit(3)
1
xxxx F0
Notes: 1. The DATA FORMAT in each bus cycle is as follows: I/O15 - I/O8 (Don't Care); I/O7 - I/O0 (Hex)
2. The 8K word boot sector has the address range 00000H to 01FFFH.
3. Either one of the Product ID Exit commands can be used.
4. SA = sector addresses:
SA = 03XXX for PARAMETER BLOCK 1
SA = 05XXX for PARAMETER BLOCK 2
SA = 1FXXX for MAIN MEMORY ARRAY
5. When the boot block programming lockout feature is not enabled, the boot block and the main memory block will erase
together (from the same sector erase command). Once the boot region has been protected, only the main memory array
sector will erase when its sector erase command is issued.
Absolute Maximum Ratings*
Temperature Under Bias ................................ -55°C to +125°C
Storage Temperature ..................................... -65°C to +150°C
All Input Voltages
(including NC Pins)
with Respect to Ground ...................................-0.6V to +6.25V
All Output Voltages
with Respect to Ground ............................ -0.6V to VCC + 0.6V
Voltage on OE
with Respect to Ground ...................................-0.6V to +13.5V
*NOTICE:
Stresses beyond those listed under “Absolute
Maximum Ratings” may cause permanent dam-
age to the device. This is a stress rating only and
functional operation of the device at these or any
other conditions beyond those indicated in the
operational sections of this specification is not
implied. Exposure to absolute maximum rating
conditions for extended periods may affect device
reliability.
4
AT49F2048
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