HD64F2149 Datasheet, PDF (730/1035 Pages) Renesas Technology Corp – Hitachi 16-Bit Single-Chip Microcomputer

22.10.7 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 22.19 AC Characteristics in Status Read Mode
Conditions: V_CC = 3.3 V ±0.3 V, 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
FA17 to FA0
CE
OE
WE
FO7 to FO0
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: FO2 and FO3 are undefined.
Figure 22.22 Status Read Mode Timing Waveforms
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