Renesas ZTAT H8S/2357F, Hardware Manual

Page: 634 / 1047

Rev.6.00 Oct.28.2004 page 606 of 1016
REJ09B0138-0600H
Table 19-20 Programmer Mode Commands
Number
1st Cycle 2nd Cycle
Command Name of Cycles Mode Address Data Mode Address Data
Memory read mode 1 + n Write
×
H'00 Read RA Dout
Auto-program mode 129 Write
×
H'40 Write PA Din
Auto-erase mode 2 Write
×
H'20 Write
×
H'20
Status read mode 2 Write
×
H'71 Write
×
H'71
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
Conditions: V
CC
= 5.0 V
±
10%, V
SS
= 0 V, T
a
= 25
°
C
±
5
°
C
Item Symbol Min Max Unit
Command write cycle t
nxtc
20 —
µ
s
CE
hold time t
ceh
0 — ns
CE
setup time t
ces
0 — ns
Data hold time t
dh
50 — ns
Data setup time t
ds
50 — ns
Write pulse width t
wep
70 — ns
WE
rise time t
r
— 30 ns
WE
fall time t
f
— 30 ns