參數(shù)資料
型號(hào)： 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)： 115/174頁
文件大小： 1304K
代理商： S1C88848D0A0100
S1C88848 TECHNICAL MANUAL
EPSON
37
5 PERIPHERAL CIRCUITS AND THEIR OPERATIO (Output Ports)
When the FOUT frequency is made "fOSC3/n", you
must turn on the OSC3 oscillation circuit before
outputting FOUT. A time interval of several 100
sec to several 10 msec, from the turning ON of the
OSC3 oscillation circuit to until the oscillation
stabilizes, is necessary, due to the oscillation
element that is used. Consequently, if an abnormal-
ity occurs as the result of an unstable FOUT signal
being output externally, you should allow an
adequate waiting time after turning ON of the
OSC3 oscillation, before turning outputting FOUT.
(The oscillation start time will vary somewhat
depending on the oscillator and on the externally
attached parts. Refer to the oscillation start time
example indicated in Chapter 7, "ELECTRICAL
CHARACTERISTICS".)
At initial reset, OSC3 oscillation circuit is set to ON
state.
Since the FOUT signal is generated asynchronously
from the register FOUTON, when the signal is
turned ON or OFF by the register settings, a hazard
of a 1/2 cycle or less is generated.
Figure 5.5.5.4 shows the output waveform of the
FOUT signal.
FOUTON
FOUT output (R34)
01
Fig. 5.5.5.4 Output waveform of FOUT signal
■
_____
BZ output (R50), BZ output (R51)
In order for the S1C88848 to drive an external
buzzer, a BZ signal (sound generator output) can be
output from the output port terminal R50.
Furthermore, the R51 output port terminal can be
_____
used to output a BZ signal (BZ inverted signal).
The configuration of the output ports R50 and R51
is shown in Figure 5.5.5.5.
BZ signal
R
SQ
One-shot
time up
R50 output
Register BZSTP
Register BZON
Register BZSHT
Register R50D
R51 output
Mask option
Register R51D
Fig. 5.5.5.5 Configuration of R50 and R51
_____
The output control for the BZ (BZ) signal is done by
the registers BZON, BZSHT and BZSTP. When you
_____
set "1" for the BZON or BZSHT, the BZ (BZ) signal
is output from the output port terminal R50 (R51).
When "0" is set for the BZON or "1" is set for the
BZSTP, the R50 goes LOW (VSS) and the R51 goes
HIGH (VDD).
To output the BZ signal, "0" must always be set for
the data register R50D. The data register R51D does
_____
not affect the BZ output.
_____
The BZ (BZ) signal is generated by the sound
generator. With respect to control of frequency and
envelope, see "5.12 Sound Generator".
_____
Since the BZ (BZ) signal is generated asynchro-
nously from the registers BZON, BZSHT and
BZSTP, when the signal is turned ON or OFF by
setting the registers, a hazard of a 1/2 cycle or less
is generated.
Figure 5.5.5.6 shows the output waveform of the BZ
_____
(BZ) signal.
BZON/BZSHT
BZ output (R50)
BZ output (R51) *
01
when selected by mask option
___
Fig. 5.5.5.6 BZ (BZ) output waveform
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