68HC908RF datasheet(23/188 Pages) MOTOROLA

23 / 188 page

Memory

Input/Output Section

MC68HC908RF2 — Rev. 4.0

Data Sheet

MOTOROLA

Memory

$FE0E

BREAK STATUS AND CONTROL REGISTER (BSCR)

$FE0F

LVI STATUS REGISTER (LVISR)

$FE10

↓

$FEEF

UNIMPLEMENTED

(222 BYTES)

$FEF0

↓

$FEFF

MONITOR ROM

(16 BYTES)

$FF00

↓

$FFEF

UNIMPLEMENTED

(240 BYTES)

$FFF0

FLASH BLOCK PROTECT REGISTER (FLBPR)

$FFF1

RESERVED

$FFF2

↓

$FFFF

FLASH VECTORS

(14 BYTES)

Figure 2-1. Memory Map (Continued)

Addr.

Bit 7

654321

Bit 0

$0000

Port A Data Register

(PTA)

See page 108.

Read:

PTA7

PTA6

PTA5

PTA4

PTA3

PTA2

PTA1

PTA0

Write:

Reset:

Unaffected by reset

$0001

Port B Data Register

(PTB)

See page 110.

Read:

PTB3

PTB2

PTB1

PTB0

Write:

Reset:

Unaffected by reset

$0002

↓

$0003

Unimplemented

$0004

Data Direction Register A

(DDRA)

See page 109.

Read:

DDRA7

DDRA6

DDRA5

DDRA4

DDRA3

DDRA2

DDRA1

DDRA0

Write:

Reset:

00000000

$0005

Data Direction Register B

(DDRB)

See page 111.

Read:

MCLKEN

DDRB3

DDRB2

DDRB1

DDRB0

Write:

Reset:

00000000

$0006

↓

$0019

Unimplemented

= Unimplemented

= Reserved U = Unaffected X = Indeterminate

Figure 2-2. Control, Status, and Data Registers (Sheet 1 of 5)

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

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