
S1C63406 TECHNICAL MANUAL
EPSON
127
APPENDIX S5U1C63000P MANUAL (PERIPHERAL CIRCUIT BOARD FOR S1C63406)
(4) Register monitor pins
These pins correspond one-to-one to the registers listed below. The pin outputs a high for logic "1"
and a low for logic "0".
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Monitor
DONE: The monitor pin outputs a high while the LED lights when
initialization of this board completes without problems.
Name
DONE *
VDC0
VDC1
OSCC
CLKCHG
SVDON
SVDDT
HLMOD
LPWR
VCCHG
–
LED No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
LED
Name
DONE *
VDC0
VDC1
OSCC
CLKCHG
SVDON
SVDDT
HLMOD
LPWR
VCCHG
–
Monitor pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
1
3
5
7
9
11
13
15
2
4
6
8
10
12
14
16
LED
(5) CR oscillation frequency adjusting control
When OSC1 and/or OSC3 are set for a CR oscillation circuit by a mask option, this control allows you
to adjust the oscillation frequency. The oscillation frequency can be adjusted in the range of approx. 20
kHz to 500 kHz for OSC1 and approx. 100 kHz to 8 MHz for OSC3. Note that the actual IC does not
operate with all of these frequencies; refer to Section 4.3, "Oscillation Circuit", to select the appropriate
operating frequency.
OSC1 rough adjustment
OSC1 fine adjustment
OSC3 rough adjustment
OSC3 fine adjustment
(6) CR oscillation frequency monitor pins
These pins allow you to monitor the clock waveform from the CR oscillation circuit with an oscillo-
scope. Note that these pins always output a signal waveform whether or not the oscillation circuit is
operating.
OSC3 monitor pin (red)
OSC1 monitor pin (red)
GND pin (black)
RESET
(7) RESET switch
This switch initializes the internal circuits of this board and feeds a reset signal to the ICE.