MC68HC705C9A_1 Datasheet, PDF(29/157 Page) Freescale Semiconductor, Inc – General Release Specification

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MC68HC705C9A_1 Datasheet, PDF (29/157 Pages) Freescale Semiconductor, Inc – General Release Specification

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Freescale Semiconductor, Inc.

General Release Specification

Functional Pin Descriptions

PA6

1

PA5

2

PA4

3

PA3

4

PA2

5

PA1

6

PA0

7

PB0

8

PB1

9

PB2

10

PB3

11

33

TCMP

32

PD5/SS

31

PD4/SCK

30

PD3/MOSI

29

PD2/MISO

28

PD1/TDO

27

PD0/RDI

26

PC0

25

PC1

24

PC2

23

PC3

Figure 1-8. 44-Pin QFP Pin Assignments

1.7.1 VDD and VSS

Power is supplied to the MCU using these two pins. VDD is the positive

supply and VSS is ground.

1.7.2 VPP

This pin provides the programming voltage to the EPROM array. For

normal operation, VPP should be tied to VDD.

1.7.3 IRQ

This interrupt pin has an option that provides two different choices of

interrupt triggering sensitivity. The IRQ pin contains an internal Schmitt

MC68HC705C9A â Rev. 2.0

General Description

For More Information On This Product,

Go to: www.freescale.com

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