MC68HC11G5 Datasheet, PDF (31/195 Pages) Motorola, Inc – High-density Complementary Metal Oxide Semiconductor (HCMOS) Microcontroller

Freescale Semiconductor, Inc.
$0000
$1000
$2000
$3000
$4000
$5000
$6000
$7000
$8000
$9000
$A000
$B000
$C000
$D000
$E000
$F000
$FFFF
Single
Chip
External
External
Expanded
Bootstrap
Non-Multiplexed
External
External
Test
Normal Modes
Special Modes
$0000 ^{512 byte RAM}
(May be remapped to any 4k
$01FF _{boundary by the INIT register)}
$1000 ^{128-byte Register Block}
(May be remapped to any 4k boundary
$107F _{by the INIT register)}
256 bytes
Bootstrap
ROM
$BF00
$BFFF
$BFC0
$BFFF
$C000
16k ROM
Special Modes
Interrupt Vectors
$FFFF
$FFC0 _{Normal Modes}
$FFFF interrupt Vectors
Figure 3-1. Memory Map
3.4.2 Expanded Non-multiplexed Mode
This normal operating mode is established by having a logic one level on both the MODB/V_kam pin
and the MODA/LIR pin at the rising edge of RESET. The ROMON bit in the CONFIG register is a
zero in this mode so that the user ROM does not appear in the map. The initial memory map which
results is also controlled by the state of three bits (RBOOT, SMOD, and MDA) in the HPRIO control
register which are initialized automatically by hardware prior to the rising edge on RESET.
Initial conditions affecting the memory map are:
ROMON = 0, RBOOT = 0, SMOD = 0, MDA = 1
MEMORY AND CONTROL/STATUS REGISTERS
3-3
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