Epson S1C6P366 Technical Manual page 157

(7) Connecting the target board
Connect the target board to the S1C88/S1C63 Serial Connector.
Refer to Section A.2.4, "Connection diagram for serial programming (S1C88/S1C63 Serial Connector)",
for connection.
Note: Do not turn on the power of the target board since the PROM programming power (5 V) is supplied
from the Universal Writer.
(8) Erasing PROM
Clear (erase) the contents of the PROM (code PROM and segment option PROM) and perform erase
check using the following command.
63P366:FERSA /E
"ERASE COMPLETED" is displayed when erasing has finished normally.
In a sample chip in which the PROM has not been protected, the code PROM and segment option
PROM can be erased individually using the FERSI and FERSC commands, respectively. Refer to
Section A.4.2, "Detailed description of the Universal ROM Writer II commands", for details.
Notes: • Inspection data is written to the PROM at shipment, so erase it once to initialize the contents.
• The PROM is protected when user data is written at Seiko Epson's factory. The protection is
released after the contents have been erased by the FERSA command.
(9) Writing user data
Write code PROM data and verify the written data using the following command.
63P366:FWI /V
"WRITE COMPLETED" is displayed when writing has finished normally.
Then, write segment option PROM data and verify the written data using the following command.
63P366:FWC /V
"WRITE COMPLETED" is displayed when writing has finished normally.
(10) Disconnecting the target board
Disconnect the target board after checking that writing has finished normally. To continue writing,
repeat from step (7) to step (10).
Note: Do not disconnect the target board when the READY LED on the S1C88/S1C63 Serial Connector
is not lit.
(11) Terminating the Control Software
Execute the QUIT command to terminate the control software.
63P366:Q
Note: Restarting the control software after it has been terminated without the QUIT command, for
instance the MS-DOS prompt window is closed, may cause an error such as "RAM CLEAR
ERROR". In this case, turn the Universal Writer off once and then turn on before starting up the
control software.
(12) Power off
Turn the Universal Writer off (POWER SW is located on the side panel) then the personal computer.
S1C6P366 TECHNICAL MANUAL
APPENDIX A PROM PROGRAMMING
EPSON
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