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AT89C5122D-RDRUM 数据表(PDF) 154 Page - ATMEL Corporation |
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AT89C5122D-RDRUM 数据表(HTML) 154 Page - ATMEL Corporation |
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154 / 208 page  154 AT83R5122, AT8xC5122/23 4202F–SCR–07/2008 Power Reduction Mode P5 inputs allow exit from idle and power-down modes as detailed in Section "Power- Down Mode". Registers Reset Value = 0000 0000b Table 94. Keyboard Flag Register - KBF (9Eh) 7654321 0 KBF7 KBF6 KBF5 KBF4 KBF3 KBF2 KBF1 KBF0 Bit Number Bit Mnemonic Description 7KBF7 Keyboard line 7 flag Set by hardware when the Port line 7 detects a programmed level. It generates a Keyboard interrupt request if the KBE.7 bit in KBE register is set. Cleared by hardware after the read of the KBF register. 6KBF6 Keyboard line 6 flag Set by hardware when the Port line 6 detects a programmed level. It generates a Keyboard interrupt request if the KBE.6 bit in KBE register is set. Cleared by hardware after the read of the KBF register. 5KBF5 Keyboard line 5 flag Set by hardware when the Port line 5 detects a programmed level. It generates a Keyboard interrupt request if the KBE.5 bit in KBE register is set. Cleared by hardware after the read of the KBF register. 4KBF4 Keyboard line 4 flag Set by hardware when the Port line 4 detects a programmed level. It generates a Keyboard interrupt request if the KBE.4 bit in KBE register is set. Cleared by hardware after the read of the KBF register. 3KBF3 Keyboard line 3 flag Set by hardware when the Port line 3 detects a programmed level. It generates a Keyboard interrupt request if the KBE.3 bit in KBE register is set. Cleared by hardware after the read of the KBF register. 2KBF2 Keyboard line 2 flag Set by hardware when the Port line 2 detects a programmed level. It generates a Keyboard interrupt request if the KBE.2 bit in KBE register is set. Cleared by hardware after the read of the KBF register. 1KBF1 Keyboard line 1 flag Set by hardware when the Port line 1 detects a programmed level. It generates a Keyboard interrupt request if the KBE.1 bit in KBE register is set. Cleared by hardware after the read of the KBF register. 0KBF0 Keyboard line 0 flag Set by hardware when the Port line 0 detects a programmed level. It generates a Keyboard interrupt request if the KBE.0 bit in KBE register is set. Cleared by hardware after the read of the KBF register. |
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