MC9S12T64 Datasheet, PDF (127/608 Pages) Motorola, Inc – Specification

Freescale Semiconductor, Inc.
Module Mapping Control (MMC)
Register Descriptions
Initialization of
CALRAM Position
Register (INITCRM)
This register initializes the CALRAM position. Mapping of CALRAM is
controlled by six bits in the INITCRM register. The MC9S12T64 has 2K
bytes of CALRAM which is activated by the CRAMON bit in the INITCRM
register. After reset CALRAM address space begins at location $1000
but can be mapped to any 2K byte boundary within the standard 64K
byte address space.
Read: Anytime.
Write: Anytime.
NOTE: Writes to this register take one cycle to go into effect.
Reset: $11 (CALRAM located from $1000 – $17FF)
Address Offset: $0012
Bit 7
6
5
4
3
2
Read:
0
CRAM15 CRAM14 CRAM13 CRAM12 CRAM11
Write:
Reset: 0
0
0
1
0
0
= Unimplemented
1
Bit 0
0
CRAMON
0
1
CRAM[15:11] — Internal CALRAM map position
These bits specify the upper five bits of the 16-bit CALRAM address.
Read or write anytime.
CRAMON — internal CALRAM On (Enabled)
This bit enables the CALRAM in the memory map.
Read or write anytime.
1 = Place CALRAM in the memory map at the address selected by
CRAM15–CRAM11.
0 = Removes the CALRAM from the map.
MOTOROLA
Module Mapping Control (MMC)
For More Information On This Product,
Go to: www.freescale.com
MC9S12T64Revision 1.1.1
127