Chapter 5 External Bus Interface (S12XEBIV4)
MC9S12XE-Family Reference Manual Rev. 1.19
Freescale Semiconductor
243
Refer to the S12X_MMC section for a detailed description of the MCU operating modes.
5.1.4
Block Diagram
is a block diagram of the XEBI with all related I/O signals.
Figure 5-1. XEBI Block Diagram
5.2
External Signal Description
The user is advised to refer to the SoC section for port configuration and location of external bus signals.
NOTE
The following external bus related signals are described in other sections:
ECLK, ECLKX2 (free-running clocks) — PIM section
TAGHI, TAGLO (tag inputs) — PIM section, S12X_DBG section
outlines the pin names and gives a brief description of their function. Refer to the SoC section
and PIM section for reset states of these pins and associated pull-ups or pull-downs.
XEBI
ADDR[22:0]
DATA[15:0]
LSTRB
RW
UDS
LDS
RE
WE
EWAIT
ACC[2:0]
IQSTAT[3:0]
IVD[15:0]
CS[3:0]
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