MPC555CME Freescale Semiconductor, MPC555CME Datasheet - Page 95

• Manufacturer Part Number: MPC555CME
• Description: KIT EVALUATION FOR MPC555
• Manufacturer: Freescale Semiconductor
• Type: Microcontrollerr

Specifications of MPC555CME

• Contents: Module Board, Installation Guide, Power Supply, Cable, Software and more
• Processor To Be Evaluated: MPC555
• Data Bus Width: 32 bit
• Interface Type: RS-232
• For Use With/related Products: MPC555
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

2.5 Pad Types
2.5.1 Pad Interface Signals
MPC555
USER’S MANUAL
NOTES:
There are different pad types based on functional characteristics. Even pads with the
same functionality may be different due to different electrical characteristics. All 5-V
inputs have hysteresis. There is no synchronization in the pads; it is all in the modules.
The pad interface consists of an internal interface and an external interface. The ex-
ternal interface is to the pin. The internal interface is the set of signals that interface
the pad to the chip’s internal logic. The following internal interface signals are used:
1. During reset, the output enable to the pad driver is negated and the PU3/PU5 is active. After reset is negated,
2. Pull-up/pull-down is active when pin is defined as an input and/or during reset; therefore, output enable is
3. These pins are powered by KAPWR (Keep-Alive Power Supply).
4. This pin is an active negate signal and may need an external pull-up resister.
VDDSRAM
KAPWR
VDDSYN
VSSSYN
the output enable is continuously enabled and the PU3 is disabled. The driver is responsible for driving a
valid state on the pin.
negated. This also means that external pull-up/pull-down is not required unless specified.
• Data – The line driven from an internal module of the chip to the pad. For bi-di-
• 3-V / 5-V select – Selects a 3-V or 5-V driver, for pads that support both. This sig-
• Output enable (OE) – Enables the output driver. For 3-V / 5-V pads, the appropri-
• Input enable – Enables the receiver. For 3-V / 5-V pads, the appropriate receiver
VDDH
VDDF
EPEE
VSSF
VDDL
VDDI
VSSI
VPP
VSS
/
rectional pins, the internal interface may be a single line for both input and output
or two separate paths for input and output. The descriptions of individual pad
types specify which.
nal is driven from the USIU.
ate driver is enabled based on the pin functionality selected.
is enabled based on the pin functionality selected.
Pin
MPC556
3
Function
VDDSRAM
VDDSYN
VSSSYN
KAPWR
Table 2-4 Pin Reset State (Continued)
VDDSI
VDDH
EPEE
VDDF
VDDL
VSSF
VSSI
VPP
VSS
SIGNAL DESCRIPTIONS
Rev. 15 October 2000
Global Power Supplies
Port
I
I
I
I
I
I
I
I
I
I
I
I
I
CMF
Voltage
3 V
5 V
3 V
3 V
3 V
5 V
3 V
3 V
3 V
3 V
3 V
3 V
—
PD
—
—
—
Reset State
—
—
—
—
—
—
—
—
—
MOTOROLA
2-37