Datasheet

Section 17 ROM
Rev.7.00 Feb. 14, 2007 page 752 of 1108
REJ09B0089-0700
17.28.6 Status-Read Mode
(1) Status-read mode is used to determine the type of an abnormal termination. Use this mode
when automatic programming or automatic erasure ends abnormally.
(2) The return code is retained until writing of a command that selects a mode other than status-
read mode.
Table 17.59 lists the return codes of status-read mode. For the AC characteristics in status-read
mode, see section 17.29.2, AC Characteristics and Timing in PROM Mode.
Table 17.59 Return Codes of Status-Read Mode
Pin Name I/O
7
I/O
6
I/O
5
I/O
4
I/O
3
I/O
2
I/O
1
I/O
0
Attribute Normal end
indicator
Command
error
Programming
error
Erase error — — Programming
or erase count
exceeded
Invalid
address
error
Initial value 0 0 0 0 0 0 0 0
Indication Normal
end: 0
Abnormal
end: 1
Command
error: 1
Otherwise: 0
Programming
error: 1
Otherwise: 0
Erase
error:1
Otherwise: 0
— — Count
exceeded: 1
Otherwise: 0
Invalid
address
error: 1
Otherwise:
0
Note: I/O
3
and I/O
2
are undefined pins.
17.28.7 Status Polling
(1) The I/O
7
status-polling output is a flag that indicates the operating status in auto-program or
auto-erase mode.
(2) The I/O
6
status-polling output is a flag that indicates normal/abnormal end of auto-program or
auto-erase mode.
Table 17.60 Truth Table of Status-Polling Output
Pin Name 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