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MC68340 数据表(PDF) 97 Page - Freescale Semiconductor, Inc |
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MC68340 数据表(HTML) 97 Page - Freescale Semiconductor, Inc |
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97 / 441 page  3- 48 MC68340 USER’S MANUAL MOTOROLA CLKOUT VCO LOCK BUS CYCLES RESET VCC 1 23 4 BUS STATE UNKNOWN ADDRESS AND CONTROL SIGNALS THREE-STATED 512 TCLKOUT 14 CLOCKS ≤ NOTES: 1. Internal start-up time. 2. SSP read here. 3. PC read here. 4. First instruction fetched here. 328 TCLKIN ×× Figure 3-28. Power-Up Reset Timing Diagram When a RESET instruction is executed, the MC68340 drives the RESET signal for 512 clock cycles. The SIM40 registers and the module control registers in each internal peripheral module (DMA, timers, and serial modules) are not affected. All other peripheral module registers are reset the same as for a hardware reset. The external devices connected to the RESET signal are reset at the completion of the RESET instruction. Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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