MOD5234-100IR NetBurner Inc, MOD5234-100IR Datasheet - Page 138

• 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

Cache
5-12
Bits
4–3
1–0
5
2
Name
BWE
WP
—
—
Table 5-7. ACR Field Descriptions (Continued)
Buffered write enable. This bit defines the value for enabling buffered writes. If BWE = 0,
the termination of an operand write cycle on the processor's local bus is delayed until the
external bus cycle is completed. If BWE = 1, the write cycle on the local bus is terminated
immediately and the operation is then buffered in the bus controller. In this mode, operand
write cycles are effectively decoupled between the processor's local bus and the external
bus.
Generally, the enabling of buffered writes provides higher system performance but
recovery from access errors may be more difficult. For the V2 ColdFire core, the reporting
of access errors on operand writes is always imprecise, and enabling buffered writes
simply decouples the write instruction from the signaling of the fault even more.
0 Writes are not buffered.
1 Writes are buffered.
Reserved, should be cleared.
Write protect. The WP bit defines the write-protection attribute. If the effective memory
attributes for a given access select the WP bit, an access error terminates any attempted
write with this bit set.
0 Read and write accesses permitted
1 Only read accesses permitted
Reserved, should be cleared.
MCF5235 Reference Manual, Rev. 2
Description
Freescale Semiconductor