MC68340FE16E Datasheet, PDF (37/441 Pages) Freescale Semiconductor, Inc – Integrated Processor with DMA User’s Manual

Freescale Semiconductor, Inc.
Table 2-1. Signal Index (Continued)
Signal Name
Clock Mode Select/
Port B0
Instruction Fetch/
Development Serial In
Instruction Pipe/
Development Serial Out
Breakpoint/Development
Serial Clock
Freeze
Transmit Data
Clear-to-Send
Request-to-Send/
OP1, OP0
Serial Crystal Oscillator
Serial Clock
Transmitter Ready/OP6
Receiver Ready/
FIFO Full/OP4
DMA Request
DMA Acknowledge
DMA Done
Timer Gate
Timer Input
Timer Output
Test Clock
Test Mode Select
Test Data In
Test Data Out
Synchronizer Power
System Power Supply
and Ground
Mnemonic
MODCK
IFETCH/DSI
IPIPE/DSO
BKPT/DSCLK
Function
Selects the source of the internal system clock upon reset
or becomes a parallel I/O port
Indicates when the CPU32 is performing an instruction
word prefetch and when the instruction pipeline has been
flushed or provides background debug mode serial in
Used to track movement of words through the instruction
pipeline or provides background debug mode serial out
Signals a hardware breakpoint to the CPU32 or provides
background debug mode serial clock
FREEZE
Indicates that the CPU32 has entered background debug
mode
TxDA, TxDB Transmitter serial data output from the serial module
CTSA, CTSB Serial module clear-to-send inputs
RTSB, RTSA Channel request-to-send outputs or discrete outputs
Input/
Output
In/I/O
Out/In
Out/Out
In/—
Out
Out
In
Out/Out
X1, X2
SCLK
T≈RDYA
R≈RDYA
DRE
Q2, DREQ1
DACK2,
DACK1
DONE2,
DONE1
TGATE2,
TGATE1
TIN2, TIN1
TOUT2,
TOUT1
TCK
TMS
TDI
TDO
VCCSYN
VCC , GND
Connections for an external crystal to the serial module
internal oscillator circuit
External serial module clock input
Indicates transmit buffer has a character or becomes a
parallel output
Indicates receive buffer has a character, the receiver
FIFO buffer is full or becomes a parallel output
Input that starts a DMA process
Output that signals an access during DMA
Bi-directional signal that indicates the last transfer
Counter enable input to timer
Time reference input to timer
Output waveform from timer
Provides a clock for IEEE 1149.1 test logic
Controls test mode operations
Shifts in instructions and test data
Shifts out instructions and test data
Quiet power supply to VCO; also used to control
synthesizer mode after reset.
Power supply and ground to the MC68340
In
Out/Out
Out/Out/Out
In
Out
I/O
In
In
Out
In
In
In
Out
—
—
MOTOROLA
MC68340 USER’S MANUAL
2-3
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