
184
EPSON
S1C8F626 TECHNICAL MANUAL
APPENDIX C PROM PROGRAMMING
RS-232C interface type: when the On Board Writer (S5U1C88000W3) is used
To
On Board
Writer
VDDF
VDD
CLK
VSS
SCLK
VSS
RXD
VSS
TXD
VSS
RESET
VSS
SPRG
VSS
Reserved
SRDY
VDD
DCLK
DRXD
DTXD
RESET
DMOD
VSS
OSC1
OSC2
OSC3
OSC4
VD1
S1C8F626
1
16
Target board
Data bus
Address bus
16-pin target board connector
+ CP
–
Clock
control circuit
Serial I/F
for debugging
Debug
control circuit
Flash EEPROM
48K + 192K
bytes
Flash
control circuit
CG3
CG1
X'tal1
Rf
X'tal3 or
Ceramic
R
CR3
CD3
C1
Fig. C.2.4.2 Connection diagram for on-board programming (RS-232C interface type)
Table C.2.4.3 Signal specifications (RS-232C interface type)
Connector pin No.
1
2
3
5
7
9
11
13
15
16
4, 6, 8, 10, 12, 14
Signal name
VDDF
VDD
CLK
SCLK
RXD
TXD
RESET
SPRG
SRDY
VSS
Description
Programming power supply pin
Power supply pin
System clock output
Reserved
Serial I/F data input
Serial I/F data output
Initial reset output
Programming mode setup output (for negative polarity I/O models)
Programming mode setup output (for positive polarity I/O models)
Reserved
Ground pin
Microcomputer pin
to be connected
VDD pin
DCLK pin
N.C.
DTXD pin
DRXD pin
RESET pin
DMOD pin
N.C.
VSS pin
Table C.2.4.4 Connectors for connecting On Board Writer (RS-232C interface type)
Name
Box header (male)
[target side]
Socket connector (female)
[SIO cable side]
Model name
3408-6002LCFL (3M)
or equivalent
Socket connector
7916-B500FL (3M)
Strain relief
3448-7916 (3M)
or equivalent
Notes:  Prepare a 3.3-V power supply for PROM programming, since the power (3.3 V) of the On Board
Writer must be supplied from the target board.
 Since PROM programming uses a 3.3-V power source, be careful of the voltage ratings of the
parts on the target board.