hd64338023s Renesas Electronics Corporation., hd64338023s Datasheet - Page 221

• Manufacturer Part Number: hd64338023s
• Description: Renesas 8-bit Single-chip Microcomputer Super Low Power Series
• Manufacturer: Renesas Electronics Corporation.

6.10.3
1. After completion of auto-program/auto-erase/status read operations, a transition is made to the
2. In memory read mode, command writes can be performed in the same way as in the command
3. After powering on, memory read mode is entered.
4. Tables 6.14 to 6.16 show the AC characteristics.
Table 6.14 AC Characteristics in Transition to Memory Read Mode
Conditions: V
Item
Command write cycle
C E
C E
Data hold time
Data setup time
Write pulse width
W E
W E
command wait state. When reading memory contents, a transition to memory read mode must
first be made with a command write, after which the memory contents are read. Once memory
read mode has been entered, consecutive reads can be performed.
wait state.
hold time
setup time
rise time
fall time
Memory Read Mode
Figure 6.13 Timing Waveforms for Memory Read after Memory Write
CC
I/O7−I/O0
= 3.3 V ±0.3 V, V
Note: Data is latched on the rising edge of WE.
A15−A0
WE
CE
CE
OE
OE
Command write
t
ces
SS
t
f
Symbol
t
t
t
t
t
t
t
t
= 0 V, T
nxtc
ceh
ces
dh
ds
wep
r
f
t
t
wep
ds
t
ceh
t
r
a
t
dh
= 25°C ±5°C
Min
20
0
0
50
50
70
—
—
t
nxtc
Rev. 7.00 Mar 10, 2005 page 179 of 652
Max
—
—
—
—
—
—
30
30
Memory read mode
Address stable
Unit
µs
ns
ns
ns
ns
ns
ns
ns
Notes
Figure 6.13
REJ09B0042-0700
Section 6 ROM