E0C63P366
The PROM writer does not supply the source voltage to the E0C63P366 during serial programming. Therefore,
supply a 5V source voltage between the V
DD
and V
SS
terminals of the E0C63P366 in order to operate the OSC1
oscillation circuit.
Furthermore, to start a serial programming, an initial reset to the E0C63P366 is required. Use the RESET termi-
nal to reset the E0C63P366 securely after turning the PROM writer on.
The following shows the timing chart to start serial programming mode.
RESET
SPRG
0.5–1
S
PROM writer
power ON
Start serial programing
mode
Parallel Programming Mode
The parallel programming can be performed by installing the E0C63P366 to the exclusive PROM writer via the
adaptor socket. In this mode, it is not necessary to set up the programming terminals since it is controlled by the
exclusive PROM writer.
5