19.6.3
Operation in Writer Mode
The program/erase/verify specifications in writer mode are the same as for the standard
HN28F101 flash memory. However, since the H8/3334YF does not support product name
recognition mode, the programmer cannot be automatically set with the device name. Table 19.13
indicates how to select the various operating modes.
Table 19.13 Operating Mode Selection in Writer Mode
Pins
Mode
FVPP
VCC
VCC
VCC
VCC
CE
L
OE
L
WE
H
D7 to D0
A16 to A0
Read
Read
Data output
High impedance
Address input
Output
disable
VCC
L
H
H
Standby
VCC
VPP
VPP
VCC
VCC
VCC
H
L
L
X
L
X
H
H
High impedance
Data output
Command Read
write
Output
H
High impedance
disable
Standby
Write
VPP
VPP
VCC
VCC
H
L
X
H
X
L
High impedance
Data input
Note: Be sure to set the FVPP pin to VCC in these states. If it is set to 0 V, hardware standby mode
will be entered, even when in writer mode, resulting in incorrect operation.
Legend:
L:
Low level
High level
VPP level
VCC level
Don’t care
H:
VPP:
VCC:
X:
418
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