參數(shù)資料
型號： S1C88848D0A0100
元件分類： 微控制器/微處理器
英文描述： 8-BIT, MROM, 8.2 MHz, MICROCONTROLLER, UUC192
封裝： DIE-192
文件頁數(shù)： 76/174頁
文件大?。?/td> 1304K
代理商： S1C88848D0A0100
S1C88848 TECHNICAL MANUAL
EPSON
159
APPENDIX A S5U1C88000P1&S5U1C88816P2 MANUAL (Peripheral Circuit Board for S1C88848)
(2) Differences in current consumption
The amount of current consumed by this board
differs significantly from that of the actual IC.
Inspecting the LEDs on the S5U1C88000P1
front panel may help keep track of approxi-
mate current consumption. The following
factors/components greatly affect device
current consumption:
Those which can be verified by LEDs
and monitor pins
a) Run and Halt execution ratio
(verified by LEDs and monitor pins on the
ICE)
b) CPU operating clock change control
(LED 4: monitor pin 4)
c) OSC3 oscillation on/off control
(LED 5: monitor pin 5)
d) SVD circuit on/off control
(LED 6: monitor pin 6)
e) LCD power supply control
(LED 7: monitor pin 7)
f) SLEEP and Halt execution ratio
(LED 9: monitor pin 9)
g) OSC1 operating clock
(LED 10: monitor pin 10)
h) OSC3 operating clock
(LED 11: monitor pin 11)
Those that can only be counteracted
by system or software
i) Current consumed by the internal pull-up
resistors
j) Input ports in a floating state
The S1C88848 does not support a heavy load
protection function. Therefore, current con-
sumption of the S1C88848 does not change if
LED8 is lit to indicate that the IC is in heavy
load protection mode.
(3) Functional precautions
LCD circuit
Pay attention to the output drive capability
and output voltage of the LCD terminals (SEG,
COM), since they are different from those of
the actual IC. The system and the software
should be designed in order to adjust the LCD
contrast. The S5U1C88000P1 board allows
switching of the LCD drive voltage with its
switch on the back side. (Refer to Section A.1,
"Names and Functions of Each Part")
When the LCDC0 and LCDC1 registers are
both set to "0" (LCD power control circuit is
off), the SEG and COM terminal outputs of the
actual IC are fixed at VSS level. Note, however,
that the COM outputs are fixed at VC4 level
and the SEG outputs are fixed at VC3 (= VC2)
level in this board.
SVD circuit
The SVD function is realized by artificially
varying the power supply voltage using the
VSVD control on the front panel of the
S5U1C88000P1.
There is a finite delay time from when the
power to the SVD circuit turns on until actual
detection of the voltage. The delay time on this
board differs from that of the actual IC. Refer
to Chapter 7, "ELECTRICAL CHARACTERIS-
TICS" when setting the appropriate wait time
for the actual IC.
Oscillation circuit
The OSC1 crystal oscillation frequency is fixed
at 32.768 kHz.
The OSC1 CR oscillation frequency can be
adjusted in the range of approx. 20 kHz to 500
kHz using the control on the S5U1C88000P1
front panel. Note that the actual IC does not
operate with all of these frequencies; refer to
Chapter 7, "ELECTRICAL CHARACTERIS-
TICS" to select the appropriate operating
frequency.
The OSC3 crystal oscillation frequency is fixed
at 4.9152 MHz.
The OSC3 CR oscillation frequency can be
adjusted in the range of approx. 100 kHz to 8
MHz using the control on the S5U1C88000P1
front panel. Note that the actual IC does not
operate with all of these frequencies; refer to
Chapter 7, "ELECTRICAL CHARACTERIS-
TICS" to select the appropriate operating
frequency.
The S5U1C88000P1&S5U1C88816P2 does not
include the OSC3 ceramic oscillation circuit.
When ceramic oscillation circuit is selected by
mask option, the S5U1C88816P2 uses the on-
board crystal oscillation circuit.
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