參數(shù)資料
型號: MC68HC08KH12A
廠商: 飛思卡爾半導體(中國)有限公司
英文描述: Microcontrollers
中文描述: 微控制器
文件頁數(shù): 162/178頁
文件大?。?/td> 925K
代理商: MC68HC08KH12A
Keyboard Interrupt Module (KBI)
MC68HC08KH12A Data Sheet, Rev. 1.1
162
Freescale Semiconductor
15.7 Stop Mode
The keyboard modules remain active in stop mode. Clearing the IMASKx bit in the keyboard status and
control register enables keyboard interrupt requests to bring the MCU out of stop mode.
15.8 Keyboard Module During Break Interrupts
The system integration module (SIM) controls whether the keyboard interrupt latch cam be cleared during
the break state. The BCFE bit in the break flag control register (BFCR) enables software to clear status
bits during the break state.
To allow software to clear the keyboard interrupt latch during a break interrupt, write a logic 1 to the BCFE
bit. If a latch is cleared during the break state, it remains cleared when the MCU exits the break state.
To protect the latch during the break state, write a logic 0 to the BCFE bit. With BCFE at logic 0 (its default
state), writing to the keyboard acknowledge bit (ACKx) in the keyboard status and control register during
the break state has no effect.
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