aPPenDiX B PeRiPheRal CiRCuiT BOaRDS FOR S1C6F016
aP-B-2
Seiko epson Corporation
S1C63003/004/008/016 TeChniCal Manual
(Rev. 1.1)
(3) Register monitor leDs/pins
These LEDs and pins correspond one-to-one to the registers listed below. The LED lights when the register is set
to "1" and goes out when the register is set to "0." The monitor pins output a high level when the register is "1"
and a low level when the register is "0."
1.1.1 Register monitor LEDs/pins
Table B.
Monitor
pins
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
No.
pin
LED
Register = "1"
Register = "0"
Name
Name
1
DONE
–
Initialization of this board has com-
pleted normally.
During initialization
2
OSCC
OSC3 oscillation: On
OSC3 oscillation: Off
3
CLKCHG
CPU clock: OSC3
CPU clock: OSC1
4
VCSEL
–
FF02H•D2 = "1"
(general-purpose register)
FF02H•D2 = "0"
(general-purpose register)
5
DBON
–
FF02H•D0 = "1"
(general-purpose register)
FF02H•D0 = "0"
(general-purpose register)
6
VCHLMOD
V
C
regulator heavy load protection
mode: On
V
C
regulator heavy load protection
mode: Off
7
VDHLMOD
V
D
regulator heavy load protection
mode: On
V
D
regulator heavy load protection
mode: Off
8
VCREF
V
C
regulator reference voltage: V
C2
V
C
regulator reference voltage: V
C1
9
LPWR
V
C
regulator: On
V
C
regulator: Off
10
SVDON
SVD circuit: On
SVD circuit: Off
11
SVDS0
SVD criteria voltage level
12
SVDS1
13
SVDS2
14
SVDS3
15
SVDS4
16
–
–
–
–
(4) CR oscillation frequency adjusting control
This control is used to adjust the OSC3 oscillation frequency. This function is effective only when CR oscillation
is selected for the OSC3 oscillation circuit by mask option. The oscillation frequency can be adjusted in the range
of about 100 kHz to 8 MHz. Note that the actual IC may not operate throughout this frequency range. Refer to
"Electrical Characteristics" to select the appropriate operating frequency.
Not used
Not used
OSC3 rough adjustment
OSC3 fine adjustment
1.1.2 CR oscillation frequency adjusting control
Figure B.
When ceramic oscillation is selected for the OSC3 oscillation circuit by mask option, the OSC3 frequency is fixed
at 4.1943 MHz in this board .
(5) CR oscillation frequency monitor pins
These pins are used to monitor the clock waveform from the CR oscillation circuit with an oscilloscope. Note that
the monitor pin always outputs a clock regardless of whether the oscillation is enabled via software or not.
OSC3 monitor pin (red)
Not used
GND pin (black)
RESET
1.1.3 CR oscillation frequency monitor pins
Figure B.
(6) ReSeT switch
This switch initializes the internal circuits of this board and feeds a reset signal to the ICE.
(7) external part connecting socket
Unused