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參數(shù)資料
| 型號： | S1C63455D |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 4-BIT, MROM, 4.1 MHz, MICROCONTROLLER, UUC105 |
| 封裝： | DIE-105 |
| 文件頁數(shù)： | 107/119頁 |
| 文件大?。?/td> | 865K |
| 代理商： | S1C63455D |
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80
EPSON
S1C63455 TECHNICAL MANUAL
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Sound Generator)
SHTPW: One-shot buzzer pulse width setting register (FF6DHD0)
Selects the output time of the one-shot buzzer.
When "1" is written: 125 msec
When "0" is written: 31.25 msec
Reading: Valid
Writing "1" into SHTPW causes the one-short output time to be set at 125 msec, and writing "0" causes it
to be set to 31.25 msec. It does not affect normal buzzer output.
At initial reset, this register is set to "0".
BZSHT: One-shot buzzer trigger/status (FF6DHD1)
Controls the one-shot buzzer output.
When writing
When "1" is written: Trigger
When "0" is written: No operation
Writing "1" into BZSHT causes the one-short output circuit to operate and a buzzer signal to be output.
This output is automatically turned OFF after the time set by SHTPW has elapsed. The one-shot output is
only valid when the normal buzzer output is OFF (BZE = "0") and will be invalid when the normal buzzer
output is ON (BZE = "1"). 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).
When reading
When "1" is read: BUSY
When "0" is read: READY
During reading BZSHT shows the operation status of the one-shot output circuit. During one-shot
output, BZSHT becomes "1" and the output goes OFF, it shifts to "0".
At initial reset, this bit is set to "0".
BZSTP: One-shot buzzer stop (FF6DHD2)
Stops the one-shot buzzer output.
When "1" is written: Stop
When "0" is written: No operation
Reading: Always "0"
Writing "1" into BZSTP permits the one-shot buzzer output to be turned OFF prior to the elapsing of the
time set by SHTPW. Writing "0" is invalid and writing "1" is also invalid except during one-shot output.
This bit is dedicated for writing, and is always "0" for reading.
4.12.8 Programming notes
(1) Since it generates a BZ signal that is out of synchronization with the BZE register, hazards may at
times be produced when the signal goes ON/OFF due to the setting of the BZE register.
(2) The one-shot output is only valid when the normal buzzer output is OFF (BZE = "0") and will be
invalid when the normal buzzer output is ON (BZE = "1").
(3) The buzzer signal is generated by dividing the OSC1 oscillation clock. Since the frequencies and times
that are described in this section are the values in the case of crystal oscillation (32.768 kHz, Typ.),
they differ when CR oscillation (60 kHz, Typ.) is selected.
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