
S1C8F626 TECHNICAL MANUAL
EPSON
179
APPENDIX C PROM PROGRAMMING
C.2.3 PROM programming procedure
(1) Connecting the system
Connect the system as shown in Section C.2.2, "System connection for PROM programming".
(2) Power on
Turn the personal computer on.
(3) Checking the serial port assignment
(Required only when the On Board Writer is used)
Check the serial port assignment on the personal computer. The On Board Writer uses the COM1 port
by default setting.
(4) Installing the USB-Serial conversion driver
(Required only when the USB-Serial On Board Writer is used)
When the USB-Serial On Board Writer (S5U1C88000W4) is connected for the first time, a dialog box
appears on the PC screen to prompt the user to install the driver. Install the USB-Serial conversion
driver by following the prompts. The USB-Serial conversion driver was copied in the
"\EPSON\S1C88\writer\driver" folder when the S1C88 Family Integrated Tool Package
(S5U1C88000C1 Ver. 6 or later) was installed. Specify this folder as the driver location.
(5) Checking the serial port assignment
(Required only when the USB-Serial On Board Writer is used)
Open the Windows [Control Panel]
→ [System] → [Hardware] tab → [Device Manager] to check the
COM port to which the USB-Serial port is assigned.
The USB-Serial conversion driver assigns a logical COM port to the physical USB port and transfers
the COM port input/output to the USB input/output. Thus the On Board Writer Control Software
can control the USB-Serial On Board Writer connected to the USB port through the assigned COM
port.
(6) Preparing the On Board Writer Control Software
The On Board Writer Control Software was copied in the "\EPSON\S1C88\writer\OBPW" folder
when the S1C88 Family Integrated Tool Package (S5U1C88000C1 Ver. 6 or later) was installed. When
using the On Board Writer Control Software in another folder, the following two files should be
copied from the OBPW folder.
OBPW88.EXE
RW8F626.INI
(7) Connecting the target board to the USB-Serial On Board Writer or On Board Writer
As Figure C.2.2.1 or C.2.2.2 shows, connect the target board to the USB-Serial On Board Writer
(S5U1C88000W4) or On Board Writer (S5U1C88000W3) using the supplied SIO cable.
(8) Connecting the power supply for PROM programming
Connect the power supply for PROM programming (3.3 V) to the target board.
Notes: Turn off the power of the target board except for the PROM programming power supply.
Since PROM programming uses a 3.3-V power source, be careful of the voltage ratings of the
parts on the target board.
(9) Turning the PROM programming power on
Turn the PROM programming power on. This also supplies the power to the USB-Serial On Board
Writer (S5U1C88000W4) or On Board Writer (S5U1C88000W3) through the SIO cable.