mc68hc912dg128 Freescale Semiconductor, Inc, mc68hc912dg128 Datasheet - Page 89
mc68hc912dg128
Manufacturer Part Number
mc68hc912dg128
Description
M68hc12 Microcontrollers
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MC68HC912DG128.pdf
(452 pages)
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MISC — Miscellaneous Mapping Control Register
PPAGE — (Program) Page Index Register
5.5.9 Miscellaneous System Control Register
MC68HC912DG128 — Rev 3.0
MOTOROLA
RESET:
RESET:
RESET:
ROMTST
Bit 7
0
0
Bit 7
0
0
NDRF
6
0
0
6
0
0
Read and write: anytime.
This register determines the active page viewed through
MC68HC912DG128 windows.
CALL and RTC instructions have a special single wire mechanism to
read and write this register without using an address bus.
Additional mapping and external resource controls are available. To use
external resources the part must be operated in one of the expanded
modes.
Normal modes: write once; Special modes: write anytime. Read
anytime.
ROMTST — FLASH EEPROM Test mode
Freescale Semiconductor, Inc.
In normal modes, this bit is forced to zero.
For More Information On This Product,
RFSTR1
0 = 16K window for Flash memory is located from $8000–$BFFF
1 = 32K window for Flash memory is located from $8000–$FFFF
5
0
0
5
0
0
Go to: www.freescale.com
RFSTR0
Operating Modes
4
0
0
4
0
0
EXSTR1
3
1
1
3
0
0
EXSTR0
PIX2
2
1
1
2
0
ROMHM
PIX1
1
0
0
1
0
Internal Resource Mapping
ROMON
Bit 0
PIX0
Bit 0
0
1
Operating Modes
0
Technical Data
peripheral or
Exp mode
SC mode
Mode
$00FF
$0013
89
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