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SPMCK16Z4MPV20 Datasheet(PDF) 399 Page - Freescale Semiconductor, Inc |
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SPMCK16Z4MPV20 Datasheet(HTML) 399 Page - Freescale Semiconductor, Inc |
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399 / 500 page  M68HC16 Z SERIES REGISTER SUMMARY USER’S MANUAL D-25 D.4 Masked ROM Module The MRM is used only in the MC68HC16Z2 and the MC68HC16Z3. Table D-21 shows the MRM address map. The reset states shown for the MRM registers are for the generic (blank ROM) ver- sions of the device. Several MRM register bit fields can be user-specified on a custom masked ROM device. Contact a Freescale sales representative for information on or- dering a custom ROM device. D.4.1 Masked ROM Module Configuration Register STOP — Low-Power Stop Mode Enable The reset state of the STOP bit is the complement of DATA14 state during reset. The ROM array base address cannot be changed unless the STOP bit is set. 0 = ROM array operates normally. 1 = ROM array operates in low-power stop mode. The ROM array cannot be read in this mode. This bit may be read or written at any time. Table D-21 MRM Address Map Address 15 0 $YFF820 Masked ROM Module Configuration Register (MRMCR) $YFF822 Not Used $YFF824 ROM Array Base Address Register High (ROMBAH) $YFF826 ROM Array Base Address Register Low (ROMBAL) $YFF828 Signature Register High (SIGHI) $YFF82A Signature Register Low (SIGLO) $YFF82C Not Used $YFF82E Not Used $YFF830 ROM Bootstrap Word 0 (ROMBS0) $YFF832 ROM Bootstrap Word 1 (ROMBS1) $YFF834 ROM Bootstrap Word 2 (ROMBS2) $YFF836 ROM Bootstrap Word 3 (ROMBS3) $YFF838 Not Used $YFF83A Not Used $YFF83C Not Used $YFF83E Not Used MRMCR — Masked ROM Module Configuration Register $YFF820 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 STOP 0 0 BOOT LOCK EMUL ASPC[1:0] WAIT[1:0] NOT USED RESET: DATA14 0 0 1 0 0 1 1 1 1 Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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