HD64F2357F20V Datasheet, PDF (636/1049 Pages) Renesas Technology Corp – Hardware Manual Renesas 16-Bit Single-chip Microcomputer H8S Family / H8S/2300 Series

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
Number
of Cycles
1+n
129
2
2
Mode
Write
Write
Write
Write
1st Cycle
Address Data
×
H'00
×
H'40
×
H'20
×
H'71
Mode
Read
Write
Write
Write
2nd Cycle
Address Data
RA
Dout
PA
Din
×
H'20
×
H'71
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
Command write cycle
CE hold time
CE setup time
Data hold time
Data setup time
Write pulse width
WE rise time
WE fall time
Symbol
t _nxtc
t _ceh
t _ces
t _dh
t _ds
t _wep
t_r
t_f
Min
20
0
0
50
50
70
—
—
Max
Unit
—
µs
—
ns
—
ns
—
ns
—
ns
—
ns
30
ns
30
ns
Rev.6.00 Oct.28.2004 page 606 of 1016
REJ09B0138-0600H