MC68MH360EM25L Freescale Semiconductor, MC68MH360EM25L Datasheet - Page 359

• Manufacturer Part Number: MC68MH360EM25L
• Description: IC MPU QUICC ETHER 25MHZ 240FQFP
• Manufacturer: Freescale Semiconductor

Specifications of MC68MH360EM25L

• Processor Type: M683xx 32-Bit
• Speed: 25MHz
• Voltage: 5V
• Mounting Type: Surface Mount
• Package / Case: 240-FQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Features: -

The data associated with each IDMA channel for the auto buffer and buffer chaining modes
is stored in buffers. Each buffer is referenced by a BD. The BDs use a ring structure located
in the dual-port RAM.
7.6.4.2.1 IDMA Parameter RAM. When an IDMA channel is configured to the auto buffer or
buffer chaining mode, the QUICC uses the IDMA parameters listed in Table 7-2.T
The IBASE entry defines the starting location in the dual-port RAM for the set of IDMA BDs.
It is an offset from the beginning of the dual-port RAM. The user must initialize this entry
before enabling the IDMA channel. Furthermore, the user should not overlap BD tables of
two enabled serial channels or IDMA channels, or erratic operation will result. IBASE should
contain a value that is divisible by 16.
MOTOROLA
SOURCE DEVICE OR
SOURCE DEVICE OR
SOURCE DEVICE OR
SOURCE DEVICE OR
DATA BUFFER 2
DATA BUFFER N
DATA BUFFER 1
DATA BUFFER 0
IDMA Base + 00
IDMA Base + 02
IDMA Base + 04
IDMA Base + 08
ADDRESS (IBASE)
NOTE: The entry in boldface must be initialized by the user.
IDMA BD BASE
Address
Freescale Semiconductor, Inc.
For More Information On This Product,
Table 7-3. IDMA Parameter RAM
Figure 7-9. IDMA BD Ring
ISTATE
ITEMP
IBASE
IBPTR
Name
MC68360 USER’S MANUAL
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BD 0
BD 1
BD 2
BD N
Width
Word
Word
Long
Long
IDMA BD Base Address
IDMA BD Pointer
IDMA Internal State
IDMA Temp
Description
DESTINATION DEVICE
DESTINATION DEVICE
DESTINATION DEVICE
DESTINATION DEVICE
OR DATA BUFFER 0
OR DATA BUFFER 2
OR DATA BUFFER N
OR DATA BUFFER 1
IDMA Channels
7-35