
MOTOROLA
MC68LC302 REFERENCE MANUAL
1-1
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.
Figure 1-1. MC68LC302 Block Diagram
PERIPHERAL BUS
68000
SYSTEM BUS
4 SDMA
CHANNELS
INTERRUPT
CONTROLLER
RISC
CONTROLLER
STATIC
M68000
CORE
1 GENERAL-
PURPOSE
DMA
CHANNEL
3 TIMERS
4 CHIP SELECTS
PIO
SYSTEM CONTROL
RAM / ROM
SCP
+
2 SMCs
1152 BYTES
DUAL-PORT
RAM
2 SERIAL
CHANNELS
(SCCs)
PIT
LOW
POWER
CONTROL
20 ADDRESS
8/16 DATA
68LC302