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MC9S12A256 Datasheet(PDF) 62 Page - Motorola, Inc |
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MC9S12A256 Datasheet(HTML) 62 Page - Motorola, Inc |
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62 / 130 page  MC9S12DT256 Device User Guide — V03.03 60 Figure 2-6 External Clock Connections (PE7=0) 2.3.14 PE6 / MODB / IPIPE1 — Port E I/O Pin 6 PE6 is a general purpose input or output pin. It is used as a MCU operating mode select pin during reset. The state of this pin is latched to the MODB bit at the rising edge of RESET. This pin is shared with the instruction queue tracking signal IPIPE1. This pin is an input with a pull-down device which is only active when RESET is low. 2.3.15 PE5 / MODA / IPIPE0 — Port E I/O Pin 5 PE5 is a general purpose input or output pin. It is used as a MCU operating mode select pin during reset. The state of this pin is latched to the MODA bit at the rising edge of RESET. This pin is shared with the instruction queue tracking signal IPIPE0. This pin is an input with a pull-down device which is only active when RESET is low. 2.3.16 PE4 / ECLK — Port E I/O Pin 4 PE4 is a general purpose input or output pin. It can be configured to drive the internal bus clock ECLK. ECLK can be used as a timing reference. 2.3.17 PE3 / LSTRB / TAGLO — Port E I/O Pin 3 PE3 is a general purpose input or output pin. In MCU expanded modes of operation, LSTRB can be used for the low-byte strobe function to indicate the type of bus access and when instruction tagging is on, TAGLO is used to tag the low half of the instruction word being read into the instruction queue. MCU EXTAL XTAL CMOS-COMPATIBLE EXTERNAL OSCILLATOR not connected (VDDPLL-Level) |
Similar Part No. - MC9S12A256 |
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Similar Description - MC9S12A256 |
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