Table of Contents
Paragraph
Title
Page
Number
MOTOROLA
MC68LC302 REFERENCE MANUAL
ix
4.3.12.3
Transparent Receive Buffer Descriptor (RxBD) .................................... 4-24
4.3.12.4
Transparent Transmit Buffer Descriptor (Tx BD)................................... 4-25
4.3.12.5
Transparent Event Register .................................................................. 4-25
4.3.12.6
Transparent Mask Register ................................................................... 4-25
4.4
Serial Communication Port (SCP)......................................................... 4-25
4.4.1
SCP Programming Model...................................................................... 4-25
4.4.2
SCP Transmit/Receive Buffer Descriptor .............................................. 4-26
4.5
Serial Management Controllers (SMCs)................................................ 4-26
4.5.1
SMC Programming Model ..................................................................... 4-26
4.5.2
SMC Memory Structure and Buffers Descriptors .................................. 4-26
4.5.2.1
SMC1 Receive Buffer Descriptor .......................................................... 4-26
4.5.2.2
SMC1 Transmit Buffer Descriptor ......................................................... 4-26
4.5.2.3
SMC2 Receive Buffer Descriptor .......................................................... 4-27
4.5.2.4
SMC2 Transmit Buffer Descriptor ......................................................... 4-27
Section 5
Signal Description
5.1
Functional Groups ................................................................................... 5-1
5.2
Power Pins .............................................................................................. 5-2
5.3
Clock Pins ............................................................................................... 5-4
5.4
System Control Pins................................................................................ 5-5
5.5
Address Bus Pins (A19–A1).................................................................... 5-7
5.6
Data Bus Pins (D15—D0) ....................................................................... 5-8
5.7
Bus Control Pins...................................................................................... 5-9
5.8
Bus Arbitration Pins............................................................................... 5-10
5.9
Interrupt Control Pins ............................................................................ 5-11
5.10
MC68LC302 Bus Interface Signal Summary......................................... 5-12
5.11
Physical Layer Serial Interface Pins...................................................... 5-14
5.12
Typical Serial Interface Pin Configurations ........................................... 5-14
5.13
NMSI1 or ISDN Interface Pins............................................................... 5-14
5.14
NMSI2 Port or Port a Pins ..................................................................... 5-17
5.15
PAIO / SCP Pins ................................................................................... 5-18
5.16
Timer Pins ............................................................................................. 5-19
5.17
Parallel I/O Pins with Interrupt Capability .............................................. 5-20
5.18
Chip-Select Pins.................................................................................... 5-21
5.19
When to Use Pullup Resistors............................................................... 5-21
Section 6
Electrical Characteristics
6.1
Maximum Ratings.................................................................................... 6-2
6.2
Thermal Characteristics .......................................................................... 6-2
6.3
Power Considerations ............................................................................. 6-3
6.4
Power Dissipation.................................................................................... 6-4
6.5
DC Electrical Characteristics................................................................... 6-5
6.6
DC Electrical Characteristics—NMSI1 in IDL Mode................................ 6-6
6.7
AC Electrical Specifications—Clock Timing ............................................ 6-6