MC68HC908AP16CFB datasheet(162/440 Pages) MOTOROLA

162 / 440 page

Monitor ROM (MON)

Data Sheet

MC68HC908AP Family — Rev. 2.5

162

MOTOROLA

Figure 10-5. Read Transaction

Figure 10-6. Write Transaction

A brief description of each monitor mode command is given in

Table 10-4 through Table 10-9.

Table 10-4. READ (Read Memory) Command

Description

Read byte from memory

Operand

2-byte address in high-byte:low-byte order

Data

Returned

Returns contents of specified address

Opcode

$4A

Command Sequence

READ

ECHO

FROM HOST

ADDRESS

HIGH

ADDRESS

HIGH

ADDRESS

LOW

ADDRESS

LOW

DATA

RETURN

13, 2

Notes:

2 = Data return delay, 2 bit times

3 = Cancel command delay, 11 bit times

4 = Wait 1 bit time before sending next byte.

1 = Echo delay, 2 bit times

WRITE

ECHO

FROM HOST

ADDRESS

HIGH

ADDRESS

HIGH

ADDRESS

LOW

ADDRESS

LOW

DATA

Notes:

2 = Cancel command delay, 11 bit times

3 = Wait 1 bit time before sending next byte.

32, 3

1 = Echo delay, 2 bit times

READ

ECHO

SENT TO

MONITOR

ADDRESS

HIGH

ADDRESS

HIGH

ADDRESS

LOW

DATA

RETURN

ADDRESS

LOW

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

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