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HCS08 bảng dữ liệu(PDF) 129 Page - NXP Semiconductors |
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HCS08 bảng dữ liệu(HTML) 129 Page - NXP Semiconductors |
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129 / 374 page  Keyboard Interrupts (S08KBIV2) MC9S08JM60 Series Data Sheet, Rev. 5 Freescale Semiconductor 129 9.3.2 KBI Pin Enable Register (KBIPE) KBIPE contains the pin enable control bits. 9.3.3 KBI Edge Select Register (KBIES) KBIES contains the edge select control bits. 765 43 210 R 0 0 0 0 KBF 0 KBIE KBMOD W KBACK Reset: 00 00 000 0 = Unimplemented Figure 9-3. KBI Status and Control Register Table 9-2. KBISC Register Field Descriptions Field Description 7:4 Unused register bits, always read 0. 3 KBF Keyboard Interrupt Flag — KBF indicates when a keyboard interrupt is detected. Writes have no effect on KBF. 0 No keyboard interrupt detected. 1 Keyboard interrupt detected. 2 KBACK Keyboard Acknowledge — Writing a 1 to KBACK is part of the flag clearing mechanism. KBACK always reads as 0. 1 KBIE Keyboard Interrupt Enable — KBIE determines whether a keyboard interrupt is requested. 0 Keyboard interrupt request not enabled. 1 Keyboard interrupt request enabled. 0 KBMOD Keyboard Detection Mode — KBMOD (along with the KBEDG bits) controls the detection mode of the keyboard interrupt pins.0Keyboard detects edges only. 1 Keyboard detects both edges and levels. 765 43 210 R KBIPE7 KBIPE6 KBIPE5 KBIPE4 KBIPE3 KBIPE2 KBIPE1 KBIPE0 W Reset: 00 00 000 0 Figure 9-4. KBI Pin Enable Register Table 9-3. KBIPE Register Field Descriptions Field Description 7:0 KBIPEn Keyboard Pin Enables — Each of the KBIPEn bits enable the corresponding keyboard interrupt pin. 0 Pin not enabled as keyboard interrupt. 1 Pin enabled as keyboard interrupt. |
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