h8s-2646 Renesas Electronics Corporation., h8s-2646 Datasheet - Page 748

• Manufacturer Part Number: h8s-2646
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Section 20 ROM
20.11.6 Status Read Mode
1. Status read mode is provided to identify the kind of abnormal end. Use this mode when an
2. The return code is retained until a command write other than a status read mode command
Table 20.18 AC Characteristics in Status Read Mode
Conditions: V
Rev. 5.00 Sep 22, 2005 page 722 of 1136
REJ09B0257-0500
Item
Read time after command write
CE hold time
CE setup time
Data hold time
Data setup time
Write pulse width
OE output delay time
Disable delay time
CE output delay time
WE rise time
WE fall time
I/O7–I/O0
Note: I/O2 and I/O3 are undefined.
A18–A0
abnormal end occurs in auto-program mode or auto-erase mode.
write is executed.
WE
OE
CE
CC
= 5.0 V ±0.5 V, V
t
ces
Figure 20.24 Status Read Mode Timing Waveforms
t
f
t
ds
t
wep
H'71
t
t
ceh
r
t
dh
SS
t
Symbol
t
t
t
t
t
t
t
t
t
t
t
nxtc
= 0 V, T
nxtc
ceh
ces
dh
ds
wep
oe
df
ce
r
f
t
ces
t
f
t
ds
a
t
= 25°C ±5°C
wep
H'71
t
ceh
t
Min
20
0
0
50
50
70
—
—
—
—
—
r
t
dh
t
nxtc
t
ce
Max
—
—
—
—
—
—
150
100
150
30
30
t
oe
Unit
µs
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
t
df
t
nxtc