Datasheet

Section 19 ROM
Rev.6.00 Sep. 27, 2007 Page 788 of 1268
REJ09B0220-0600
19.11.8 Status Polling
• The I/O
7
status polling flag indicates the operating status in auto-program or auto-erase mode.
• The I/O
6
status polling flag indicates a normal or abnormal end in auto-program or auto-erase
mode.
Table 19.23 Status Polling Output Truth Table
Pin Names
Internal Operation
in Progress Abnormal End — Normal End
I/O
7
0 1 0 1
I/O
6
0 0 1 1
I/O
0
to I/O
5
0 0 0 0
19.11.9 PROM Mode Transition Time
Commands cannot be accepted during the oscillation stabilization period or the PROM mode setup
period. After the PROM mode setup time, a transition is made to memory read mode.
Table 19.24 Command Wait State Transition Time Specifications
Item Symbol Min Max Unit
Standby release (oscillation
stabilization time)
t
osc1
30 — ms
PROM mode setup time t
bmv
10 — ms
V
CC
hold time t
dwn
0 — ms
V
CC
RES
Memory read
mode
Command
wait state
Command
wait state
Normal/
abnormal end
identification
Auto-program mode
Auto-erase mode
t
osc1
t
bmv
t
dwn
Command acceptance
Figure 19.28 Oscillation Stabilization Time, PROM Mode Setup Time, and Power Supply
Fall Sequence