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HCS08 Folha de dados(PDF) 139 Page - NXP Semiconductors |
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HCS08 Folha de dados(HTML) 139 Page - NXP Semiconductors |
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139 / 198 page ![]() Keyboard Interrupts (S08KBIV2) MC9S08QD4 Series MCU Data Sheet, Rev. 6 Freescale Semiconductor 139 10.3.2 KBI Pin Enable Register (KBIPE) KBIPE contains the pin enable control bits. 10.3.3 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 10-3. KBI Status and Control Register Table 10-2. 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 10-4. KBI Pin Enable Register Table 10-3. 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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