AT25DF021_09 Datasheet, PDF (33/41 Pages) ATMEL Corporation – 2-Megabit 2.3-volt or 2.7-volt Minimum SPI Serial Flash Memory

AT25DF021
14.5 AC Characteristics – All Other Parameters (Continued)
AT25DF021
(2.3V Version)
Symbol Parameter
Min
Max
t_WPS(1)(3) Write Protect Setup Time
20
t_WPH(1)(3) Write Protect Hold Time
100
t_SECP(1)
Sector Protect Time (from Chip Select High)
20
t_SECUP(1) Sector Unprotect Time (from Chip Select High)
20
t_EDPD(1)
Chip Select High to Deep Power-Down
3
t_RDPD(1) Chip Select High to Standby Mode
30
Notes: 1. Not 100% tested (value guaranteed by design and characterization).
2. 15 pF load at frequencies above 66 MHz, 30 pF otherwise.
3. Only applicable as a constraint for the Write Status Register command when SPRL = 1.
AT25DF021
(2.7V Version)
Min
Max
20
100
20
20
3
30
Units
ns
ns
ns
ns
µs
µs
14.6 Program and Erase Characteristics
Symbol Parameter
Min Typ Max Units
t_PP(1)
Page Program Time (256 Bytes)
1.0
5.0
ms
t_BP
Byte Program Time
7
µs
4 Kbytes
50
200
t_BLKE(1)
Block Erase Time
32 Kbytes
250 600 ms
64 Kbytes
450 950
t_CHPE(1)(2) Chip Erase Time
t_OTPP(1)
OTP Security Register Program Time
t_WRSR(2) Write Status Register Time
Note: 1. Maximum values indicate worst-case performance after 100,000 erase/program cycles.
2.0
3.5
sec
200 500
µs
200
ns
2. Not 100% tested (value guaranteed by design and characterization).
14.7 Power-up Conditions
Symbol Parameter
t_VCSL
t_PUW
V_POR
Minimum V_CC to Chip Select Low Time
Power-up Device Delay Before Program or Erase Allowed
Power-on Reset Voltage
Min Max Units
1.2
ms
10
ms
1.5
2.2
V
33
3677D–DFLASH–04/09