![](/html/SST/20431/page19.png)
2 Mbit Flash + 1 Mbit SRAM ComboMemory
SST31LF021 / SST31LF021E
Data Sheet
Internal Timer
Byte
Program/Erase
Initiated
Wait TBP,
TSBE, or TSE
Program/Erase
Completed
FIGURE 17: WAIT OPTIONS
Toggle Bit
Byte
Program/Erase
Initiated
Read byte
Read same
byte
No
Does DQ6
match?
Yes
Program/Erase
Completed
Data# Polling
Byte
Program/Erase
Initiated
Read DQ7
No
Is DQ7 =
true data?
Yes
Program/Erase
Completed
392 ILL F14.0
©2001 Silicon Storage Technology, Inc.
19
S71137-03-000 10/01 392