166
EPSON
S1C8F626 TECHNICAL MANUAL
APPENDIX A S5U1C88000P1&S5U1C88655P2 MANUAL (Peripheral Circuit Board for S1C8F626)
(1) SW1
When downloading circuit data, set this switch
to the "3" position. Otherwise, set to position "1".
(2) LCDVCC (on the back of the S5U1C88000P1 board)
The internal power voltage (VC5) for the LCD
driver can be varied using the DIP switch as
shown in Table A.1.1. Be aware that the VC5
voltage level on this board is different from
that of the actual IC.
Table A.1.1 Setting LCDVCC
LCDVCC
Other combinations
Setting
VC5 = 6 V
VC5 = 5.75 V
VC5 = 5.5 V
VC5 = 5 V
Not allowed
1
2
3
4
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
The voltage value assumes that the LCD
contrast adjustment register LC0–LC3 is
0FH. There is a need to allow for a maximum
±6% of error due to the characteristics of the
parts used on this board.
(3) VLCD control
Unused.
(4) VSVD control
This control is used for varying the power
supply voltage to confirm the supply voltage
detection (SVD) function. (Refer to Section
A.5.2, "Differences from Actual IC".)
(5) OSC1 H control
Unused.
(6) OSC1 L control
Unused.
(7) OSC3 H control
This control is used for coarse adjustment of
the OSC3 CR oscillation frequency.
(8) OSC3 L control
This control is used for fine adjustment of the
OSC3 CR oscillation frequency.
(9) RESET switch
This switch initializes the internal circuits of
this board and feeds a reset signal to the ICE.
(10) LED 1, LED 2 (Reserved)
Unused.
(11) LED 3 (CPUMOD)
Indicates the CPU mode.
Lit:
Maximum (CPUMOD register = "1")
Not lit: Minimum (CPUMOD register = "0")
(12) LED 4 (CLKCHG)
Indicates the CPU operating clock.
Lit:
OSC3 (CLKCHG register = "1")
Not lit: OSC1 (CLKCHG register = "0")
(13) LED 5 (SOSC3)
Indicates the OSC3 oscillation status.
Lit:
OSC3 oscillation is on
(SOSC3 register = "1")
Not lit: OSC3 oscillation is off
(SOSC3 register = "0")
(14) LED 6 (SVDON)
Indicates the SVD circuit status.
Lit:
SVD circuit is on
(SVDON register = "1")
Not lit: SVD circuit is off
(SVDON register = "0")
(15) LED 7 (LCDC)
Indicates the LCD circuit status.
Lit:
LCD circuit is on
(LCDC register = Not "00")
Not lit: LCD circuit is off
(LCDC register = "00")
(16) LED 8 (HLMOD)
Indicates the heavy load protection status.
Lit:
Heavy load protection mode
(HLMOD register = "1")
Not lit: Normal mode
(HLMOD register = "0")
(17) LED 9 (HALT/SLEEP)
Indicates the CPU status.
Lit:
HALT or SLEEP
Not lit: RUN
(18) LED 10 (VDSEL)
Indicates the power voltage (VDD or VD2)
selected for the LCD system voltage regulator.
Lit:
VD2 (VDSEL register = "1")
Not lit: VDD (VDSEL register = "0")
(19) LED 11 (DBON)
Indicates the status of the power voltage booster.
Lit:
ON (DBON register = "1")
Not lit: OFF (DBON register = "0")
(20) LED 12 (SEGREV)
Indicates the SEG output assignment status.
Lit:
Reverse (SEGREV register = "1")
Not lit: Normal (SEGREV register = "0")
(21) LED 13 (VDC)
Indicates the operating mode.
Lit:
VD1 = 2.5 V (VDC register = "1")
Not lit: VD1 = 1.8 V (VDC register = "0")
(22) LED 14 (OSC1 operating clock)
The OSC1 operating clock is connected to this
LED. The corresponding monitor pin (pin 14)
can be used to check the OSC1 clock frequency.
(23) LED 15 (OSC3 operating clock)
The OSC3 operating clock is connected to this
LED. The corresponding monitor pin (pin 15)
can be used to check the OSC3 clock frequency.