Table of Contents
Advertisement
CHAPTER 14 FLASH MEMORY ( µ PD70F3008 AND 70F3008Y ONLY)
14.5.3 Reset pin
When connecting the reset signals of the dedicated flash writer to the RESET pin which is connected to the reset
signal generation circuit on-board, conflict of signals occurs. To avoid the conflict of signals, isolate the connection
to the reset signal generation circuit.
When reset signal is input from the user system during the flash memory programming mode, programming
operation will not be performed correctly. Therefore, do not input signals other than the reset signals from the
dedicated flash writer.
V854
RESET
14.5.4 NMI pin
Do not change the input signal to the NMI pin during the flash memory programming mode. If the NMI pin is changed
during the flash memory programming mode, the programming may not be performed correctly.
14.5.5 Mode pin
To switch to the flash memory programming mode, change MODE0 through MODE2 to "111" with a jumper, etc.,
applies writing voltage to V
14.5.6 Port pin
When the flash memory programming mode is set, all the port pins except the pins which communicate with the
dedicated flash writer become output high-impedance status. The treatment of these port pins are not necessary.
If problems such as disabling output high-impedance status should occurs to the external devices connected to the
port, connect them to V
or V
DD
14.5.7 Other signal pin
Connect X1, X2, CKSEL, PLLSEL, and AV
14.5.8 Power supply
Supply the same power supplies (V
Connect V
and GND of the dedicated flash writer to V
DD
a power supply monitoring function.)
390
Conflict of signals
In the flash memory programming mode, the
signal the reset signal generation circuit outputs
conflicts with the signal the dedicated flash writer
outputs.
Therefore, isolate the signals on the
reset signal generation circuit side.
pin, and release the reset.
PP
through resistors.
SS
to the same status as that in the normal operation mode.
REF
, V
, AV
, AV
DD
SS
DD
User's Manual U11969EJ3V0UM00
Dedicated flash writer connection pin
Reset signal generation circuit
Output pin
, CV
, CV
) as those in the normal operation mode.
SS
DD
SS
and V
(The V
dedicated flash writer is provided with
DD
SS.
DD
Advertisement
Table of Contents
