
S1C8F626 TECHNICAL MANUAL
EPSON
167
APPENDIX A S5U1C88000P1&S5U1C88655P2 MANUAL (Peripheral Circuit Board for S1C8F626)
(24) LED 16 (FPGA configuration)
If the FPGA on the S5U1C88000P1 includes
circuit data, this LED lights when the power is
turned on. If this LED does not light at power-
up, a circuit data must be written to the FPGA
before debugging can be started (turn the
power on again after writing data).
(25) LED signal monitor connector
This connector provides the signals that drive the
LEDs shown above for monitoring. The signals
listed below are output from the connector pins.
The signal level is high when the LED is lit and is
low when the LED is not lit.
2
4
6
8
10
12
14
16
18
20
1
3
5
7
9
11
13
15
17
19
Fig. A.1.3 LED signal monitor connector
Pin 3: LED 3 (CPU mode)
Pin 4: LED 4 (CPU operating clock)
Pin 5: LED 5 (OSC3 oscillation status)
Pin 6: LED 6 (SVD circuit status)
Pin 7: LED 7 (LCD circuit status)
Pin 8: LED 8 (Heavy load protection status)
Pin 9: LED 9 (HALT/SLEEP, RUN status)
Pin 10: LED 10 (LCD voltage regulator power status)
Pin 11: LED 11 (Power voltage booster status)
Pin 12: LED 12 (SEG output assignment status)
Pin 13: LED 13 (Operating mode/VDC status)
Pin 14: LED 14 (OSC1 operating clock)
Pin 15: LED 15 (OSC3 operating clock)
Pin 19: OSC3 CR oscillation frequency monitor pin
Pins 1, 2, 17, 18 and 20 are not used.
The OSC3 CR oscillation clock is connected to
pin 19. (The CR oscillation circuit on this board
always operates even if crystal/ceramic
oscillation is selected by option and regardless
of the SOSC3 register status.) These pins can be
used to monitor CR oscillation when adjusting
the oscillation frequency.
(26) I/O #1, I/O #2, I/O #3, I/O #4 connectors
These are the connectors for connecting the I/
O and LCD. The I/O cables (80-pin/40-pin
× 2
flat type, 100-pin/50-pin
× 2 flat type, 40-pin/
20-pin
× 2 flat type) are used to connect to the
target system.
A.2 Installation
A.2.1 Installing S5U1C88655P2
to S5U1C88000P1
Aim the I/O connectors on the add-on board
(S5U1C88655P2) at the front panel of the main
board (S5U1C88000P1) and insert the four connec-
tors on the back of the S5U1C88655P2 board into
the corresponding connectors on the
S5U1C88000P1 board.
S5U1C88000P1
S5U1C88655P2
Fig. A.2.1.1 Installing S5U1C88655P2 to S5U1C88000P1
A.2.2 Installing into the ICE
(S5U1C88000H5)
Insert the S5U1C88000P1 along by the lower guide
rail of the ICE (S5U1C88000H5), until the connec-
tors fit into the ICE back-panel connectors.
ICE (S5U1C88000H5)
S5U1C88000P1
+S5U1C88655P2
EPSON
S5U1
C880
00P1
Fig. A.2.2.1 Installing into the ICE (S5U1C88000H5)
Note: The S5U1C88000P1 and S5U1C88655P2
may fail to operate if they are not
adequately mounted, so be sure to mount
them securely.