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MC68340 データシート(PDF) 100 Page - Freescale Semiconductor, Inc |
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MC68340 データシート(HTML) 100 Page - Freescale Semiconductor, Inc |
100 / 441 page MOTOROLA MC68340 USER’S MANUAL 4- 3 . MC68340 RELOCATABLE MODULE BLOCK RAM (TYPICAL) $00000000 $XXXXXFFF MBAR ($0003FF00 FC=0111) $XXXXX000 $FFF $07F $000 $FFFFFFFF NOTE: $XXXXX is the value contained in the MBAR bits BA31-BA12. DMA SERIAL PORTS TIMER MODULES SIM 40 $7BF $780 $721 $67F $600 $700 Figure 4-1. SIM40 Module Register Block 4.2.2 System Configuration and Protection Operation The SIM40 allows the user to control certain features of system configuration by writing bits in the module configuration register (MCR). This register also contains read-only status bits that show the state of the SIM40. All M68000 family members are designed to provide maximum system safeguards. As an extension of the family, the MC68340 promotes the same basic concepts of safeguarded design present in all M68000 members. In addition, many functions that normally must be provided by external circuits are incorporated in this device. The following features are provided in the system configuration and protection function: SIM40 Module Configuration The SIM40 allows the user to configure the system to the particular requirements. The functions include control of FREEZE and show cycle operation, the function of the CS ≈ signals, the access privilege of the supervisor/user registers, the level of interrupt arbitration, and automatic vectoring for external interrupts. Reset Status The reset status register provides the user with information on the cause of the most recent reset. The possible causes of reset include: external, power-up, software watchdog, double bus fault, loss of clock, and RESET instruction. Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
同様の部品番号 - MC68340 |
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同様の説明 - MC68340 |
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