MC68331CEH16 Datasheet, PDF (10/84 Pages) Freescale Semiconductor, Inc – 32-Bit Modular Microcontroller

Freescale Semiconductor, Inc.
Table 2 MCU Pin Characteristics (Continued)
Pin
Mnemonic
RXD
SCK
SIZ[1:0]
TSC
TXD
XFC²
XTAL²
Output
Driver
—
Bo
B
—
Bo
—
—
Input
Synchronized
N
Y
Y
Y
Y
—
—
Input
Hysteresis
N
Y
N
Y
Y
—
—
Discrete
I/O
—
I/O
I/O
—
I/O
Special
Special
Port
Designation
—
PQS2
PE[7:6]
—
PQS7
—
—
NOTES:
1. DATA[15:0] are synchronized during reset only. MODCLK is synchronized only when used as an input port
pin.
2. EXTAL, XFC, and XTAL are clock reference connections.
3. PAI and PCLK can be used for discrete input, but are not part of an I/O port.
2.2 MCU Power Connections
V_DDSYN
V_SSE/V_DDE
V_SSI/V_DDI
Table 3 MCU Power Connections
Clock Synthesizer Power
External Periphery Power (Source and Drain)
Internal Module Power (Source and Drain)
2.3 MCU Driver Types
Type
A
Aw
B
Bo
Table 4 MCU Driver Types
I/O
Description
O Output-only signals that are always driven; no external pull-up required
O Type A output with weak P-channel pull-up during reset
O Three-state output that includes circuitry to pull up output before high impedance is es-
tablished, to ensure rapid rise time. An external holding resistor is required to
maintain logic level while the pin is in the high-impedance state.
O Type B output that can be operated in an open-drain mode
2.4 Signal Characteristics
Signal Name
ADDR[23:0]
AS
AVEC
BERR
BG
BGACK
BKPT
BR
CLKOUT
CS[10:0]
CSBOOT
DATA[15:0]
DS
Table 5 MCU Signal Characteristics
MCU Module
SIM
SIM
SIM
SIM
SIM
SIM
CPU32
SIM
SIM
SIM
SIM
SIM
SIM
Signal Type
Bus
Output
Input
Input
Output
Input
Input
Input
Output
Output
Output
Bus
Output
Active State
—
0
0
0
0
0
0
0
—
0
0
—
0
10
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