Chapter 3 Memory Mapping Control (S12XMMCV4)
MC9S12XE-Family Reference Manual , Rev. 1.19
190
Freescale Semiconductor
•
Expanded modes
Address, data, and control signals are activated in normal expanded and special test modes when
accessing the external bus. Access to internal resources will not cause activity on the external bus.
•
Emulation modes
External bus is active to emulate, via an external tool, the normal expanded or the normal single
chip mode.}
3.1.5
Block Diagram
1
shows a block diagram of the MMC.
Figure 3-1. MMC Block Diagram
3.2
External Signal Description
The user is advised to refer to the device overview for port configuration and location of external bus
signals. Some pins may not be bonded out in all implementations.
and
outline the pin names and functions. It also provides a brief description of their
operation.
1. Doted blocks and lines are optional. Please refer to the Device User Guide for their availlibilities.
Peripherals
FLASH
XGATE
CPU
BDM
Target Bus Controller
DBG
EEEPROM
EBI
MMC
Address Decoder & Priority
RAM
FLEXRAY
Because
of
an
order
from
the
United
States
International
Trade
Commission,
BGA-packaged
product
lines
and
part
numbers
indicated
here
currently
are
not
available
from
Freescale
for
import
or
sale
in
the
United
States
prior
to
September
2010:
S12XE
products
in
208
MAPBGA
packages