Datasheet

10 MC68331TS/D
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
2.3 MCU Driver Types
2.4 Signal Characteristics
RXD — N N — —
SCK Bo Y Y I/O PQS2
SIZ[1:0] B Y N I/O PE[7:6]
TSC — Y Y — —
TXD Bo Y Y I/O PQS7
XFC
2
— — — Special —
XTAL
2
— — — Special —
Table 3 MCU Power Connections
V
DDSYN
Clock Synthesizer Power
V
SSE
/V
DDE
External Periphery Power (Source and Drain)
V
SSI
/V
DDI
Internal Module Power (Source and Drain)
Table 4 MCU Driver Types
Type I/O Description
A O Output-only signals that are always driven; no external pull-up required
Aw O Type A output with weak P-channel pull-up during reset
B 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.
Bo O Type B output that can be operated in an open-drain mode
Table 5 MCU Signal Characteristics
Signal Name MCU Module Signal Type Active State
ADDR[23:0] SIM Bus —
AS
SIM Output 0
AVEC
SIM Input 0
BERR
SIM Input 0
BG
SIM Output 0
BGACK
SIM Input 0
BKPT
CPU32 Input 0
BR
SIM Input 0
CLKOUT SIM Output —
CS[10:0]
SIM Output 0
CSBOOT
SIM Output 0
DATA[15:0] SIM Bus —
DS
SIM Output 0
Table 2 MCU Pin Characteristics (Continued)
Pin
Mnemonic
Output
Driver
Input
Synchronized
Input
Hysteresis
Discrete
I/O
Port
Designation
Freescale Semiconductor, I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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