MC9S12T64 Datasheet, PDF (158/608 Pages) Motorola, Inc – Specification

Freescale Semiconductor, Inc.
Multiplexed External Bus Interface (MEBI)
External Bus
Interface Control
(EBICTL)
Address Offset: $000E
Bit 7
Read: 0
Write:
Reset: 0
Reset: 0
6
5
4
3
2
1
Bit 0
0
0
0
0
0
0
ESTR
0
0
0
0
0
0
0
Peripheral
0
0
0
0
0
0
1
All other
modes
= Unimplemented or reserved
Read: anytime (provided this register is in the map).
Write: refer to individual bit descriptions
The EBICTL register is used to control miscellaneous functions (i.e.
stretching of external E clock).
This register is not in the on-chip map in peripheral mode.
ESTR — E Stretches
This control bit determines whether the E clock behaves as a simple
free-running clock or as a bus control signal that is active only for
external bus cycles.
Normal and Emulation: write once
Special: write anytime
1 = E stretches high during stretch cycles and low during
non-visible internal accesses.
0 = E never stretches (always free running).
This bit has no effect in single chip modes.
MC9S12T64Revision 1.1.1
Multiplexed External Bus Interface (MEBI)
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