參數(shù)資料
型號: MB89635RP-SH
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 10 MHz, MICROCONTROLLER, PDIP64
封裝: SHRINK, DIP-64
文件頁數(shù): 17/153頁
文件大?。?/td> 7326K
代理商: MB89635RP-SH
MB89630 SERIES HARDWARE MANUAL
2-90
(3) Detailed description of registers
(a) Buzzer register (BUZR)
This 8-bit register enables buzzer output and selects the frequency.
[Bits 1 and 0] BUZ1 and BUZ0: Buzzer-select bits
Bits 1 and 0 are used to enable buzzer output and select the frequency. The buzzer output function is
disabled by 00 and the port operates normally. In other cases, the frequencies listed in the table below
are selected.
Table 2.11 Buzzer Output Frequencies (at 10 MHz Oscillation)
(4) Description of operation
This circuit outputs a signal for use as a check sound. The buzzer register is used to enable buzzer output
and select the frequency. When values other than 00 are set at the BUZR register, the square wave of the
set frequency is output at the port.
(5) Precautions for buzzer output circuit
Part of the time-base timer is used as the buzzer output. Therefore, clearing the time-base timer affects the
circuit.
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