Memory Read Mode - Renesas H8S Series Hardware Manual

Table 19-20 Programmer Mode Commands
Command Name

Memory read mode

Auto-program mode
Auto-erase mode
Status read mode
Legend:
RA: Read address
PA: Program address
×:
Don't care
Notes: 1. In auto-program mode. 129 cycles are required for command writing by a simultaneous 128-byte write.
2. In memory read mode, the number of cycles depends on the number of address write cycles (n).
19.13.4 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 19-21 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
Rev.6.00 Oct.28.2004 page 606 of 1016
REJ09B0138-0600H
Number
of Cycles Mode
1 + n Write
129 Write
2 Write
2 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
1st Cycle
Address Data Mode
×
H'00 Read
×
H'40 Write
×
H'20 Write
×
H'71 Write
Min Max
20 —
0 —
0 —
50 —
50 —
70 —
— 30
— 30
2nd Cycle
Address Data
RA Dout
PA Din
×
H'20
×
H'71
Unit
µs
ns
ns
ns
ns
ns
ns
ns