MPC980

MOTOROLA

ECLinPS and ECLinPS Lite

DL140 — Rev 3

2

Figure 1. Logic Diagram

Processor

Clock PLL

Test Mode

Xtal

Osc

14.31818MHz

fsel0:1

Dly_PCI

÷2

÷2/÷4

÷4

2

QP0:3

4

QP4:5_QPCI4:5

2

QPCI0:3

4

Q14.3M

Q14_16M

16MHz

12MHz

16M_Sel

Q12M

Q24M

Q40M

24MHz

40MHz

System

Clock PLL

TCLK

OE

0

1

0

1

TCLK_Sel

fsel2

Table 1. Pin Descriptions

Pin

Label

Ω

Description

1

VCCA

Analog VCC for System PLL Use

2

TCLK_Sel

↓ 50K Sel Ext’l TCLK or Internal Xtal Ref

3

TCLK

None

External LVCMOS Ref Signal

4

Xtal1

None

Xtal Pin 1

5

Xtal2

None

Xtal Pin 2

6

GND

System Ground Input

7

DLY_PCI

↓ 50K Sets QP & QPI Relationship

(See Function Table 2 on page 3.)

8

VCCI

VCC Pin for Internal Circuits

9

fsel0

↑ 50K Least Bit for QP/QPI Output Funct

(See Function Table 1 on page 3.)

10

fsel1

↓ 50K Most Bit for QP/QPI Output Function

(See Function Table 1 on page 3.)

11

fsel2

↓ 50K Selection of QP/QPI Output Funct

(See Function Table 4 on page 3.)

12

VCCA

Analog VCC Proc’ssr PLL Use Filter

(Note 1.)

13

GNDA

System Ground Input

14

16M_SEL

↓ 50K Selects 16MHz / 14MHz for

Q14_16M Output

15

Q14_16M

Output for 16MHz / 14MHz Xtal Osc

16

GND0

System Ground Input

17

VCC0

VCC in for the CMOS Outputs

18

Q14M

CMOS Output for 14.3MHz Xtal Osc

19

GND0

System Ground Input

20

QP0

CMOS Output QP0

21

VCC0

VCC in for the CMOS Outputs

22

QP1

CMOS Output QP1

23

GND0

System Ground Input

24

QP2

CMOS Output QP2

25

VCC0

VCC in for the CMOS Outputs

Pin

Label

Ω

Description

26

GNDI

System Ground Input

27

VCCO

VCC in for the CMOS Outputs

28

QP3

CMOS Output QP3

29

GND0

System Ground Input

30

GND0

System Ground Input

31

QP4_PCI4

CMOS Output QP4_PCI4

32

VCC0

VCC in for the CMOS Outputs

33

QP5_PCI5

CMOS Output QP5_PCI5

34

GND0

System Ground Input

35

GND0

System Ground Input

36

QPCI3

CMOS Output QPCI3

37

VCCO

VCC in for the CMOS Outputs

38

QPCI2

CMOS Output QPCI2

39

GND0

System Ground Input

40

VCCI

VCC for Internal Core Logic

41

GND0

System Ground Input

42

QPCI1

CMOS Output QPCI1

43

VCC0

VCC in for the CMOS Outputs

44

QPCI0

CMOS Output QPCI0

45

GND0

System Ground Input

46

QM12

CMOS Output QM12

47

VCC0

VCC in for the CMOS Outputs

48

Q40M

CMOS Output Q40M

49

GND0

System Ground Input

50

Q24M

CMOS Output Q24M

51

OE

↑ 50K Select Output State

(See Function Table 1 on page 3.)

52

GND0

System Ground Input

1. The filter recommended for the analog power pins is found in

Figure 3 in the Applications Information section on page 5.