mc68hc916y3 Freescale Semiconductor, Inc, mc68hc916y3 Datasheet - Page 405

• Manufacturer Part Number: mc68hc916y3
• Description: Mc68hc16y3 16 Bit Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

MRMCR — Masked ROM Module Configuration Register
D.4 Masked ROM Module
D.4.1 Masked ROM Module Configuration Register
STOP — Low-Power Stop Mode Enable
MC68HC16Y3/916Y3
USER’S MANUAL
DATA14
STOP
15
RESET:
The MRM is used only in the MC68HC16Y3. Table D-20 shows the MRM address
map.
The reset states shown for the MRM registers are for the generic (blank ROM)
versions of the device. Several MRM register bit fields can be user-specified on a
custom masked ROM device. Contact a Motorola sales representative for information
on ordering a custom ROM device.
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.
This bit may be read or written at any time.
0 = ROM array operates normally.
1 = ROM array operates in low-power stop mode. The ROM array cannot be read
14
0
0
in this mode.
NOTES:
Address
$YFF82C
$YFF83C
13
$YFF82A
$YFF82E
$YFF83A
$YFF83E
$YFF820
$YFF822
$YFF824
$YFF826
$YFF828
$YFF830
$YFF832
$YFF834
$YFF836
$YFF838
1. Y = M111, where M is the logic state of the module mapping (MM) bit in the SCIMCR.
0
0
BOOT
12
1
1
Freescale Semiconductor, Inc.
LOCK
15
11
0
For More Information On This Product,
Table D-20 MRM Address Map
EMUL
10
Masked ROM Module Configuration Register (MRMCR)
0
ROM Array Base Address Register High (ROMBAH)
ROM Array Base Address Register Low (ROMBAL)
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REGISTER SUMMARY
9
1
ASPC[1:0]
ROM Bootstrap Word 0 (ROMBS0)
ROM Bootstrap Word 1 (ROMBS1)
ROM Bootstrap Word 2 (ROMBS2)
ROM Bootstrap Word 3 (ROMBS3)
Signature Register Low (SIGLO)
Signature Register High (SIGHI)
8
1
Not Implemented
Not Implemented
Not Implemented
Not Implemented
Not Implemented
Not Implemented
Not Implemented
7
1
WAIT[1:0]
6
1
5
4
NOT USED
3
2
0
$YFF820
MOTOROLA
1
D-27
0