Table of Contents
Paragraph
Number
2.1.5.1
2.1.5.2
2.1.5.3
2.2
2.2.1
2.2.1.1
2.2.1.2
2.2.2
2.2.2.1
2.2.3
2.2.3.1
2.2.3.2
2.2.3.3
2.2.3.4
2.2.3.5
2.2.3.6
2.2.3.7
2.2.3.8
2.2.3.9
2.2.3.10
2.2.3.11
2.2.3.12
2.2.4
2.2.4.1
2.2.4.2
2.2.4.3
2.3
2.3.1
2.3.1.1
2.3.1.2
2.3.1.3
2.3.1.4
2.3.1.5
2.3.1.6
2.3.2
2.3.2.1
2.3.2.2
2.3.2.3
2.3.2.4
Title
Page
Number
vi
MC68SC302 USER’S MANUAL
MOTOROLA
EXTAL—External Clock/Crystal Input......................................................2-6
XTAL— Crystal Output ............................................................................2-6
CLKO— Clock Out...................................................................................2-7
Host Interface Pins - PCMCIA Mode .......................................................2-7
Address Bus Pins.....................................................................................2-8
PC_A[21:17]/IRQIN[5:1]/PA[15:12]—PCMCIA Address Bus...................2-8
Address Bus Pins. PC_A[16:0]–PCMCIA Address Bus...........................2-8
Data Bus Pins..........................................................................................2-8
PC_D[15:0]—PCMCIA Data Bus.............................................................2-8
Bus Control Pins......................................................................................2-8
PC_MODE—PCMCIA Mode....................................................................2-8
PC_E2E—PCMCIA Serial EEPROM mode.............................................2-8
PC_CE1 and PC_CE2— PCMCIA Card Enables 1 and 2.......................2-8
PC_OE—PCMCIA Output Enable...........................................................2-8
PC_WE—PCMCIA Write Enable.............................................................2-8
PC_A25—PCMCIA Address Bus bit 25...................................................2-8
PC_CISCS—PCMCIA CIS Chip Select...................................................2-8
PC_STSCHG—PCMCIA Status Changed (Replace BVD1)....................2-8
PC_WAIT—PCMCIA Wait .......................................................................2-9
PC_REG—PCMCIA Attribute Memory Select .........................................2-9
RESET— Hard System Reset Input........................................................2-9
IRQ3/PC_READY/IREQ— Ready or Interrupt Request Out Pin .............2-9
Clock Pins................................................................................................2-9
EXTAL—External Clock/Crystal Input......................................................2-9
XTAL— Crystal Output ............................................................................2-9
CLKO— Clock Out...................................................................................2-9
Peripheral Pins.......................................................................................2-10
ISDN Pins ..............................................................................................2-10
L1RXD—Layer-1 Receive Data.............................................................2-10
L1TXD—Layer-1 Transmit Data ............................................................2-11
L1CLK—Layer-1 Clock..........................................................................2-11
L1SYNC—Layer-1 Sync........................................................................2-11
L1GRNT / PSYNC —Layer-1 Grant / PCM SYNC.................................2-11
L1RQ / GCIDCL—Layer-1 Request / GCI Clock Out.............................2-11
NMSI Pins..............................................................................................2-11
RXD—SCC Receive Data Pin ...............................................................2-11
TXD—SCC Transmit Data Pin...............................................................2-11
TCLK / MCLK —SCC Transmit Clock Pin / Codec Main Clock .............2-11
RCLK / SCLK / IRQIN1 —SCC2 Receive Clock / Codec Serial Clock /
Interrupt Request In 1 Pin......................................................................2-11
SDS1 / FSYN / IRQIN2—Serial Data Strobe 1 / Codec Frame Sync /
Interrupt Request In 2 Pin.....................................................................2-11
SDS2 / IRQIN3—Serial Data Strobe 2 / Interrupt Request In 3 Pin.......2-12
NMSICS—NMSI Chip Select Pin...........................................................2-12
RI / IRQIN4—Ring Indicate / Interrupt Request In 4 Pin........................2-12
2.3.2.5
2.3.2.6
2.3.2.7
2.3.2.8