START
Read DQ7–DQ0
Addr = VA
Yes
DQ7 = Data?
No
No
DQ5 = 1?
Yes
Read DQ7–DQ0
Addr = VA
Yes
DQ7 = Data?
No
PASS
FAIL
Notes:
1. VA = Valid address for programming. During a sector erase operation, a valid
address is an address within any sector selected for erasure. During chip erase, a
valid address is any non-protected sector address.
2. DQ7 should be rechecked even if DQ5 = “1” because DQ7 may change simulta-
neously with DQ5.
Figure 7. Data# Polling Algorithm
RY/BY#: Ready/Busy#
The RY/BY# is a dedicated, open-drain output pin that indicates whether an Em-
bedded Algorithm is in progress or complete. The RY/BY# status is valid after the
rising edge of the final WE# pulse in the command sequence. Since RY/BY# is an
open-drain output, several RY/BY# pins can be tied together in parallel with a
pull-up resistor to V
.
CC
35
S29AL016M
S29AL016M_00A4 April 21, 2004
SPANSION [ SPANSION ]
