MC68LC302 Datasheet, PDF (10/169 Pages) Motorola, Inc – Low Power Integrated Multiprotocol Processor Reference Manual

SECTION 1
INTRODUCTION
Motorola has developed a low-cost version of the well-known MC68302 integrated multipro-
tocol processor (IMP) called the MC68LC302. Simply put, the LC302 is a traditional 68302
minus the third serial communication controller (SCC3) and has a new static 68000 core, a
new timer and low power modes. It is packaged in a low profile 100 TQFP that reduces
board space from the regular 68302, as well as making it suitable for use in height restricted
applications such as PCMCIA.
The document fully describes all the differences between the LC302 and the regular 68302.
Any feature not described in this document will operate as described in the MC68302 User’s
Manual. In addition this document contains the full set of electrical descriptions for the
LC302, even though most of them are exactly the same as the 68302.
1.1 BLOCK DIAGRAM
The block diagram is shown in Figure 1-1.
LOW
POWER
CONTROL
STATIC
M68000
CORE
RISC
CONTROLLER
INTERRUPT
CONTROLLER
1 GENERAL-
PURPOSE
DMA
CHANNEL
3 TIMERS
4 CHIP SELECTS
PIO
SYSTEM CONTROL
68000
SYSTEM BUS
4 SDMA
CHANNELS
1152 BYTES
PIT
DUAL-PORT
RAM
PERIPHERAL BUS
68LC302
2 SERIAL
CHANNELS
(SCCs)
SCP
+
2 SMCs
Figure 1-1. MC68LC302 Block Diagram
RAM / ROM
20 ADDRESS
8/16 DATA
MOTOROLA
MC68LC302 REFERENCE MANUAL
1-1