HD64F2357F20V Datasheet, PDF (642/1049 Pages) Renesas Technology Corp – Hardware Manual Renesas 16-Bit Single-chip Microcomputer H8S Family / H8S/2300 Series

• The status polling I/O₆ and I/O₇ pin information is retained until the next command write. Until the next command
write is performed, reading is possible by enabling CE and OE.
19.13.7 Status Read Mode
• Status read mode is used to identify what type of abnormal end has occurred. Use this mode when an abnormal end
occurs in auto-program mode or auto-erase mode.
• The return code is retained until a command write for other than status read mode is performed.
Table 19-26 AC Characteristics in Status Read Mode
Conditions: V_CC = 5.0 V ±10%, V_SS = 0 V, T_a = 25°C ±5°C
Item
Command write cycle
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
Symbol
t _nxtc
t _ceh
t _ces
t _dh
t _ds
t _wep
t _oe
t _df
t _ce
t_r
t_f
Min
20
0
0
50
50
70
—
—
—
—
—
Max
—
—
—
—
—
—
150
100
150
30
30
Unit
µs
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Address
CE
OE
WE
Data
t_wep
t_nxtc
t_wep
t_nxtc
t_ces
t_ceh
t_f
t_r
t_ds
t_dh
H'71
t_ces
t_ceh
t_f
t_r
t_ds
t_dh
H'71
t_ce
t_oe
t_nxtc
t_df
Data
Note: I/O2 and I/O3 are undefined.
Figure 19-31 Status Read Mode Timing Waveforms
Rev.6.00 Oct.28.2004 page 612 of 1016
REJ09B0138-0600H