Device Overview
MFR4310 Reference Manual, Rev. 2
Freescale Semiconductor 39
2.4.3.2 A[9:7] — AMI/MPC Address Bus
A[9:7] are general purpose input pins. Their function is selected by the IF_SEL[1:0] pins. Refer to
Section 2.7, “External Host Interface” for more information. The pins can be configured to enable or
disable pullup or pulldown resistors on the pins.
A[9:7] are AMI/MPC interface address signals.
2.4.3.3 OE#/ACS0 — AMI/MPC Read Output Enable, HCS12 Address Select Input
OE#/ACS0 is a general purpose input pin. Its function is selected by the IF_SEL[1:0] pins. Refer to
Section 2.7, “External Host Interface” for more information. The pin can be configured to enable or
disable a pullup or pulldown resistor on the pin.
OE# is the AMI/MPC interface output enable signal. This signal controls MFR4310 data output and the
state of three-stated data pins D[15:0] during host read operations.
ACS0 is an HCS12 interface address select signal.
2.4.3.4 A[12:11]/ACS[2:1] — AMI/MPC Address Bus, HCS12 Expanded Address
Inputs
A[12:11]/ACS[2:1] are general purpose input pins. Their function is selected by the IF_SEL[1:0] pins.
Refer to Section 2.7, “External Host Interface” for more information. The pins can be configured to enable
or disable pullup or pulldown resistors on the pins.
A[12:11] are AMI/MPC interface address signals.
ACS[1:2] are HCS12 interface address select signals.
2.4.3.5 BSEL[1:0]#/DBG[0:1] — AMI/MPC Byte Select, Debug Strobe Points
BSEL[1:0]#/DBG[0:1] are general purpose input or output pins. Their function is selected by the
IF_SEL[1:0] pins. Refer to Section 2.7, “External Host Interface” for more information. The pins can be
configured to provide high or reduced output drive, and also to enable or disable pullup or pulldown
resistors on the pins.
BSEL[1:0]# are AMI/MPC byte select signals.
DBG[0:1] are debug strobe point output signals. The functions output on these pins are selected by the
debug port control register. Refer to Section 3.4.16, “Strobe Signal Support” for more information.
2.4.3.6 D[15:8]/PB[0:7] — AMI/MPC Data Bus, HCS12 Multiplexed Address/Data
Bus
D[15:8]/PB[0:7] are general purpose input or output pins. Their functions are selected by the IF_SEL[1:0]
pins. Refer to Section 2.7, “External Host Interface” for more information. These pins can be configured
to provide high or reduced output drive, and also to enable or disable pullup or pulldown resistors on the
pins.
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