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)： 23/174頁
文件大?。?/td> 1304K
代理商： S1C88848D0A0100
S1C88848 TECHNICAL MANUAL
EPSON
111
5 PERIPHERAL CIRCUITS AND THEIR OPERATION (Sound Generator)
BZSHT: 00FF44HD5
Controls the one-shot buzzer output.
When "1" is written: Trigger
When "0" is written: No operation
When "1" is read:
Busy
When "0" is read:
Ready
Writing "1" into BZSHT causes the one-shot output
_____
circuit to operate. The BZ (BZ) signal is output from
the R50 (R51) terminal. The buzzer output is
automatically turned OFF after the time set by
SHTPW has elapsed.
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 one-shot output is only valid when the normal
buzzer output is OFF (BZON = "0") state. The
trigger is invalid during ON (BZON = "1") state.
When a re-trigger is assigned during a one-shot
output, the one-shot output time set with SHTPW is
measured again from that point. (time extension)
The operation status of the one-shot output circuit
can be confirmed by reading BZSHT, when the one-
shot output is ON, "1" is read from BZSHTand
when the output is OFF, "0" is read.
At initial reset, BZSHT is set to "0" (ready).
_____
The BZ signal can be output from R51 only when
the function is selected by mask option.
BZSTP: 00FF44HD6
Forcibly stops the one-shot buzzer output.
When "1" is written: Forcibly stop
When "0" is written: No operation
Reading:
Constantly "0"
By writing "1" into BZSTP, the one-shot buzzer
output can be stopped prior to the elapsing of the
time set with SHTPW.
Writing "0" is invalid and writing "1" except during
one-shot output is also invalid.
When "1" is written to BZSHT and BZSTP simulta-
neously, BZSTP takes precedence and one-shot
output becomes stop status.
Since BZSTP is for writing only, during readout it is
constantly set to "0".
5.12.7 Programming notes
(1) Since the buzzer signal is generated asynchro-
nously from the register BZON, when the signal
is turned ON or OFF by the register setting, a
hazard of a 1/2 cycle or less is generated.
(2) The SLP instruction has executed when the
buzzer signal output is in the enable status
(BZON = "1" or BZSHT = "1"), unstable clock is
output from the output terminal at the time of
return from the SLEEP status. Consequently,
when shifting to the SLEEP status, you should
set the buzzer signal output to the disable status
(BZON = BZSHT = "0") prior to executing the
SLP instruction.
(3) The one-shot output is only valid when the
normal buzzer output is OFF (BZON = "0")
status. The trigger is invalid during ON (BZON
= "1") status.
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