MOD5234-100IR NetBurner Inc, MOD5234-100IR Datasheet - Page 119

• Manufacturer Part Number: MOD5234-100IR
• Description: MOD5234 10/100 ETHERNET MODULE
• Manufacturer: NetBurner Inc
• Type: Controllers & Processorsr

Specifications of MOD5234-100IR

• Interface: I²C, SPI, UART
• Voltage - Supply: 2.5V
• Mounting Type: Surface Mount
• Package / Case: Module
• Product: Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Data Format: -
• Baud Rates: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: Q4483564

4.5.1
The instruction execution times for the EMAC can be found in
Execution
The EMAC execution pipeline overlaps the AGEX stage of the OEP; that is, the first stage of the
EMAC pipeline is the last stage of the basic OEP. EMAC units are designed for sustained,
fully-pipelined operation on accumulator load, copy, and multiply-accumulate instructions.
However, instructions that store contents of the multiply-accumulate programming model can
generate OEP stalls that expose the EMAC execution pipeline depth, as in the following:
mac.w
mov.l
The mov.l instruction that stores the accumulator to an integer register (Rz) stalls until the
program-visible copy of the accumulator is available.
Freescale Semiconductor
Load AccExtensions23
Store AccExtensions01 MOV.L ACCext01,Rx
Store AccExtensions23 MOV.L ACCext23,Rx
Command
Ry, Rx, Acc0
Acc0, Rz
EMAC Instruction Execution Times
Times.”
AGEX
EMAC EX1
EMAC EX3
EMAC EX4
Accumulator 0
DSOC
EMAC EX2
Table 4-3. EMAC Instruction Summary (Continued)
MOV.L {Ry,#imm},ACCext23
Figure 4-8. EMAC-Specific OEP Sequence Stall
mac
Mnemonic
MCF5235 Reference Manual, Rev. 2
mac
mac
regBusy stall
Three-cycle
mac
mov
Loads the accumulator 2,3 extension bytes with a 32-bit
operand
Writes the contents of accumulator 0,1 extension bytes into a
CPU register
Writes the contents of accumulator 2,3 extension bytes into a
CPU register
old
Figure 4-8
mac
mov
mac
Section 3.12, “EMAC Instruction
shows EMAC timing.
Description
mov
mov
EMAC Instruction Set Summary
new
4-13