MC68LC302 Datasheet, PDF (6/169 Pages) Motorola, Inc – Low Power Integrated Multiprotocol Processor Reference Manual

Table of Contents
Paragraph
Number
Title
Page
Number
3.6
3.6.1
3.6.2
3.6.3
3.6.3.1
3.6.3.2
3.6.4
3.6.5
3.7
3.7.1
3.7.2
3.7.2.1
3.7.2.2
3.7.2.3
3.7.2.4
3.7.2.5
3.7.3
3.7.3.1
3.7.3.2
3.7.4
3.7.4.1
3.7.4.2
3.7.4.3
3.7.4.4
3.8
3.8.1
3.8.1.1
3.8.1.2
3.8.2
3.8.3
3.8.3.1
3.8.3.2
3.9
Parallel I/O Ports ................................................................................... 3-17
Parallel I/O Port Differences.................................................................. 3-17
Port A .................................................................................................... 3-17
Port B .................................................................................................... 3-18
PB7–PB3............................................................................................... 3-18
PB11–PB8............................................................................................. 3-18
Port N .................................................................................................... 3-19
Port Registers........................................................................................ 3-19
Timers ................................................................................................... 3-20
MC68LC302 General Purpose Timer Difference .................................. 3-20
General Purpose Timers Programming Mode....................................... 3-20
Timer Mode Register (TMR1, TMR2).................................................... 3-20
Timer Reference Registers (TRR1, TRR2) ........................................... 3-21
Timer Capture Registers (TCR1, TCR2) ............................................... 3-21
Timer Counter (TCN1, TCN2) ............................................................... 3-21
Timer Event Registers (TER1, TER2) ................................................... 3-21
Timer 3 - Software Watchdog Timer ..................................................... 3-22
Software Watchdog Reference Register (WRR) ................................... 3-22
Software Watchdog Counter (WCN) ..................................................... 3-22
Periodic Interrupt Timer (PIT)................................................................ 3-22
Overview ............................................................................................... 3-23
Periodic Timer Period Calculation ......................................................... 3-23
Using the Periodic Timer As a Real-Time Clock ................................... 3-24
Periodic Interrupt Timer Register (PITR)............................................... 3-24
External Chip-Select Signals and Wait-State Logic .............................. 3-25
Chip-Select Registers............................................................................ 3-26
Base Register (BR3–BR0) .................................................................... 3-26
Option Registers (OR3–OR0) ............................................................... 3-26
Disable CPU Logic (M68000)................................................................ 3-28
Bus Arbitration Logic ............................................................................. 3-28
Internal Bus Arbitration.......................................................................... 3-28
External Bus Arbitration......................................................................... 3-28
Dynamic RAM Refresh Controller ......................................................... 3-29
4.1
4.2
4.2.1
4.2.1.1
4.2.1.2
4.3
4.3.1
4.3.1.1
4.3.2
4.3.2.1
Section 4
Communications Processor (CP)
MC68LC302 Key Differences from the MC68302 ................................... 4-1
Serial Channels Physical Interface.......................................................... 4-2
Serial Interface Registers ........................................................................ 4-2
Serial Interface Mode Register (SIMODE) .............................................. 4-2
Serial Interface Mask Register (SIMASK) ............................................... 4-4
Serial Communication Controllers (SCCs) .............................................. 4-4
SCC Configuration Register (SCON) ...................................................... 4-4
Divide by 2 Input Blocks (New Feature) .................................................. 4-4
Disable SCC1 Serial Clocks Out (DISC) ................................................. 4-4
RCLK1 and TCLK1 Pin Options .............................................................. 4-5
MOTOROLA
MC68LC302 REFERENCE MANUAL
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