MC68MH360RC25L Freescale Semiconductor, MC68MH360RC25L Datasheet - Page 84

• Manufacturer Part Number: MC68MH360RC25L
• Description: IC MPU QUICC 25MHZ 241-PGA
• Manufacturer: Freescale Semiconductor

Specifications of MC68MH360RC25L

• Processor Type: M683xx 32-Bit
• Speed: 25MHz
• Voltage: 5V
• Mounting Type: Surface Mount
• Package / Case: 241-PGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -

5.3.3 MPC860MH Internal Memory Structure
Figure 5-11 shows the internal memory structure of the MPC860MH. To support 32
channels on the MP860, only 2-Kbyte dual-ported RAM is needed for channel-specific
parameters. Each logical channel occupies 64 bytes; thus 32 channels require 2 Kbytes,
leaving 2 Kbytes free in the dual-ported RAM for buffer descriptors for other protocols.
To support 64 channels on the MPC860, 4-Kbyte dual-ported RAM is required for channel-
specific parameters. Each logical channel occupies 64 bytes, requiring 4 Kbytes for 64
channels.
Non-QMC protocol implementations may be constrained by these memory requirements
since their buffer descriptors need to use internal memory space.
Freescale Semiconductor, Inc.
For More Information On This Product,
Figure 5-11. MPC860MH Internal Memory
IMMR
IMMR + 0x2000
IMMR + 0x3C00
Parameter RAM
4 Kbytes
Dual-Ported
RAM
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4 Kbytes
Internal
Registers
QMC Supplement