MC68HC705P9CS datasheet(35/160 Pages) FREESCALE

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Memory

Input/Output Register Summary

MC68HC705P9 — Rev. 4.0

Technical Data

MOTOROLA

Memory

$0015

Input Capture Register Low

(ICRL)

See page 114.

Read:

Bit 7

6543

Bit 0

Write:

Reset:

Unaffected by reset

$0016

Output Compare Register High

(OCRH)

See page 115.

Read:

Bit 15

Bit 8

Write:

Reset:

Unaffected by reset

$0017

Output Compare Register Low

(OCRL)

See page 115.

Read:

Bit 7

6543

Bit 0

Write:

Reset:

Unaffected by reset

$0018

Timer Register High

(TRH)

See page 112.

Read:

Bit 15

Bit 8

Write:

Reset:

Reset initializes TRH to $FF

$0019

Timer Register Low

(TRL)

See page 112.

Read:

Bit 7

6543

Bit 0

Write:

Reset:

Reset initializes TRL to $FC

$001A

Alternate Timer Register High

(ATRH)

See page 113.

Read:

Bit 15

Bit 8

Write:

Reset:

Reset initializes ATRH to $FF

$001B

Alternate Timer Register Low

(ATRL)

See page 113.

Read:

Bit 7

6543

Bit 0

Write:

Reset:

Reset initializes ATRL to $FC

$001C

EPROM Programming Register

(EPROG)

See page 38.

Read:

00000

LATCH

EPGM

Write:

RRRR

Reset:

Unaffected by reset

Addr.

Name

Bit 7

6543

Bit 0

= Unimplemented

R = Reserved

U = Unaffected

Figure 3-2. I/O Register Summary (Sheet 3 of 4)

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

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