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164 EPSON S1C88650 TECHNICAL MANUAL
APPENDIX A S5U1C88000P1&S5U1C88649P2 MANUAL (Peripheral Circuit Board for S1C88650)
(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
V
C5
= 6 V
V
C5
= 5.75 V
V
C5
= 5.5 V
V
C5
= 5 V
Not allowed
1 2 3 4
ON
OFF
OFF
OFF
OFF
ON
OFF
OFF
OFF
OFF
ON
OFF
ON
OFF
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.2.2, "Differences from Actual IC".)
(5) OSC1 H control
This control is used for coarse adjustment of
the OSC1 CR oscillation frequency.
(6) OSC1 L control
This control is used for fine adjustment of the
OSC1 CR oscillation frequency.
(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 (MPU/MCU)
Indicates the MPU or MCU mode.
Lit: MPU mode
Not lit: MCU mode
(11) LED 2 (BUSMOD), LED 3 (CPUMOD)
Indicates the bus and CPU modes (BUSMOD/
CPUMOD register settings).
Table A.1.2 Bus and CPU modes
Lit
Lit
Not lit
Not lit
Expansion
Single chip
Bus modeBUSMOD
Maximum
Minimum
Maximum
Minimum
CPU mode
Lit
Not lit
Lit
Not lit
CPUMOD
(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 (V
DD 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")