MPC8540 datasheet(995/1302 Pages) FREESCALE

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Memory Map/Register Definition

MPC8540 PowerQUICC III Integrated Host Processor Reference Manual, Rev. 1

Freescale Semiconductor

17-71

17.3.3.1.7 Outbound Double-Word Count Register (ODCR)

The outbound double-word count register (ODCR), shown in Figure 17-68, contains the number

of double words for the message operation. The maximum message operation size is 4 Kbytes and

the minimum is 8 bytes.

Figure 17-68. Outbound Double-Word Count Register (ODCR)

Table 17-70 describes the fields of the ODCR.

3—

Reserved

4–5

DTFLOWLVL

Transaction flow priority level

00 Lowest priority transaction flow

01 Next highest priority transaction flow

10 Highest priority transaction flow

11 Reserved

6–11

—

Reserved

12–15 DWRITETTYPE Hardwired to 0110 (message)

16–21

—

Reserved

22–29

DTGTROUTE

Destination target route. Contains the target route field of the transaction (Device ID of the

target)

30–31

—

Reserved

18 19

28 29

R 0

000000

00000

0000

DCR

Reset

0000_0000_0000_0000_0000_0000_0000_0000

Offset

0xD_1020

Table 17-70. ODCR Field Descriptions

Bits

Name

Description

0–18

—

Reserved

19–28

DCR

Double-word count register. Contains the number of double words for the message operation

00 0000 0000Reserved

00 0000 00018 bytes

00 0000 001016 bytes

00 0000 010032 bytes

00 0000 100064 bytes

00 0001 0000128 bytes

00 0010 0000256 bytes

00 0100 0000512 bytes

00 1000 00001024 bytes

01 0000 00002048 bytes

10 0000 00004096 bytes

All other values yield undefined behavior.

29–31

—

Reserved

Table 17-69. ODATR Field Descriptions (continued)

Bits

Name

Description

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