Memory Read Mode - Renesas H8S/2319 series Hardware Manual

Table 17-15 Programmer Mode Commands
Command Name

Memory read mode

Auto-program mode
Auto-erase mode
Status read mode
Legend:
RA: Read address
PA: Program address
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).
17.11.4 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 17-16 AC Characteristics in Memory Read Mode
(Conditions: V
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. 5.00, 12/03, page 598 of 1088
Number
of Cycles Mode
1 + n Write
129 Write
2 Write
2 Write
= 3.3 V ±0.3 V, V
CC
Symbol
t
nxtc
t
ceh
t
ces
t
dh
t
ds
t
wep
t
r
t
f
1st Cycle
Address Data
X H'00
X H'40
X H'20
X H'71
= 0 V, T = 25°C ±5°C)
SS a
Min Max
20 —
0 —
0 —
50 —
50 —
70 —
— 30
— 30
2nd Cycle
Mode Address Data
Read RA
Write PA
Write X
Write X
Unit
µs
ns
ns
ns
ns
ns
ns
ns
Dout
Din
H'20
H'71