Memory Read Mode - Renesas H8S Series Hardware Manual

19.22.4 Memory Read Mode

• After the end of an auto-program, auto-erase, or status read operation, the command wait state is entered. To read
memory contents, a transition must be made to memory read mode by means of a command write before the read is
executed.
• Command writes can be performed in memory read mode, just as in the command wait state.
• Once memory read mode has been entered, consecutive reads can be performed.
• After power-on, memory read mode is entered.
Table 19-42 AC Characteristics in Memory Read Mode
= 5.0 V ±10%, V
Conditions: V
CC
Item
Command write cycle
CE hold time
CE setup time
Data hold time
Data setup time
Write pulse width
WE rise time
WE fall time
A to A
18 0
CE
OE
WE
Data
Note: Data is latched at the rising edge of WE.
Figure 19-55 Memory Read Mode Timing Waveforms after Command Write
= 25°C ±5°C
= 0 V, T
SS a
Symbol
t
nxtc
t
ceh
t
ces
t
dh
t
ds
t
wep
t
r
t
f
Command write
t t
wep ceh
t
ces
t t
f r
H'00
t
dh
t
ds
Min Max
20 —
0 —
0 —
50 —
50 —
70 —
— 30
— 30
Memory read mode
Address stable
t
nxtc
Rev.6.00 Oct.28.2004 page 651 of 1016
Unit
µs
ns
ns
ns
ns
ns
ns
ns
Data
REJ09B0138-0600H