IS25WP016 Datasheet, PDF (56/112 Pages) Integrated Silicon Solution, Inc – 1.8V SERIAL FLASH MEMORY WITH 133MHZ MULTI I/O SPI

ADVANCED INFORMATION
IS25WP016/080/040/020
8.21 PROGRAM/ERASE SUSPEND & RESUME
The device allows the interruption of Sector Erase, Block Erase, or Page Program operations to conduct other
operations. 75h/B0h command for suspend and 7Ah/30h for resume will be used. (SPI/QPI all acceptable)
Function Register bit2 (PSUS) and bit3 (ESUS) are used to check whether or not the device is in suspend mode.
Suspend to read ready timing: 100µs.
Resume to another suspend timing: 400µs (recommendation).
PROGRAM/ERASE SUSPEND DURING SECTOR-ERASE OR BLOCK-Erase (PERSUS 75h/B0h)
The Program/Erase Suspend allows the interruption of Sector Erase and Block Erase operations. After the
Program/Erase Suspend, WEL bit will be disabled, therefore only read related, resume and reset commands
can be accepted. Refer to Table 8.3 for more detail.
To execute the Program/Erase Suspend operation, the host drives CE# low, sends the Program/Erase Suspend
command cycle (75h/B0h), then drives CE# high. The Function Register indicates that the erase has been
suspended by changing the ESUS bit from “0” to “1”, but the device will not accept another command until it is
ready. To determine when the device will accept a new command, poll the WIP bit in the Status Register or wait
the specified time t_SUS. When ESUS bit is issued, the Write Enable Latch (WEL) bit will be reset.
PROGRAM/ERASE SUSPEND DURING PAGE PROGRAMMING (PERSUS 75h/B0h)
The Program/Erase Suspend allows the interruption of all program operations. After the Program/Erase
Suspend command, WEL bit will be disabled, therefore only read related, resume and reset command can be
accepted. Refer to Table 8.3 for more detail.
To execute the Program/Erase Suspend operation, the host drives CE# low, sends the Program/Erase Suspend
command cycle (75h/B0h), then drives CE# high. The Function Register indicates that the programming has
been suspended by changing the PSUS bit from “0” to “1”, but the device will not accept another command until
it is ready. To determine when the device will accept a new command, poll the WIP bit in the Status Register or
wait the specified time t_SUS.
PROGRAM/ERASE RESUME (PERRSM 7A/30h)
The Program/Erase Resume restarts the Program or Erase command that was suspended, and changes the
suspend status bit in the Function Register (ESUS or PSUS bits) back to “0”. To execute the Program/Erase
Resume operation, the host drives CE# low, sends the Program/Erase Resume command cycle (7Ah/30h), then
drives CE# high. A cycle is two nibbles long, most significant nibble first. To determine if the internal, self-timed
Write operation completed, poll the WIP bit in the Status Register, or wait the specified time t_SE, t_BE or t_PP for
Sector Erase, Block Erase, or Page Programming, respectively. The total write time before suspend and after
resume will not exceed the uninterrupted write times t_SE, t_BE or t_PP.
Integrated Silicon Solution, Inc.- www.issi.com
56
Rev. 00A
01/13/2015