MOD5234-100IR NetBurner Inc, MOD5234-100IR Datasheet - Page 135

• 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

Freescale Semiconductor
19–11
Bits
7–6
3–2
1–0
21
20
10
9
8
5
4
DBWE
Name
EUSP
CLNF
INVD
CEIB
DCM
DWP
INVI
—
—
—
Table 5-4. CACR Field Descriptions (Continued)
CINV instruction cache only. This bit can not be set unless the cache configuration is split
(both DISI and DISD cleared). For instruction or data cache configurations this bit is a
don’t-care. For the split cache configuration, this bit is part of the control for the invalidate
all operation. See the CINV definition for a detailed description
Table 5-6
CINV data cache only. This bit can not be set unless the cache configuration is split (both
DISI and DISD cleared). For instruction or data cache configurations this bit is a don’t-care.
For the split cache configuration, this bit is part of the control for the invalidate all operation.
See the CINV definition for a detailed description
Table 5-6
Reserved, should be cleared.
Cache enable noncacheable instruction bursting. Setting this bit enables the line-fill buffer
to be loaded with burst transfers under control of CLNF[1:0] for noncacheable accesses.
Noncacheable accesses are never written into the memory array. See
0 Disable burst fetches on noncacheable accesses
1 Enable burst fetches on noncacheable accesses
Default cache mode. This bit defines the default cache mode: 0 is cacheable, 1 is
noncacheable. For more information on the selection of the effective memory attributes,
see
0 Caching enabled
1 Caching disabled
Default buffered write enable. This bit defines the default value for enabling buffered writes.
If DBWE = 0, the termination of an operand write cycle on the processor's local bus is
delayed until the external bus cycle is completed. If DBWE = 1, the write cycle on the local
bus is terminated immediately and the operation 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, enabled buffered writes provide higher system
performance but recovery from access errors can be more difficult. For the ColdFire core,
reporting access errors on operand writes is always imprecise and enabling buffered writes
further decouples the write instruction and the signaling of the fault
0 Disable buffered writes
1 Enable buffered writes
Reserved, should be cleared.
0 Read and write accesses permitted
1 Only read accesses permitted
Enable user stack pointer. See
OTHER_A7)," for more information on the dual stack pointer implementation.
0 Disable the processor’s use of the User Stack Pointer
1 Enable the processor’s use of the User Stack Pointer
Reserved, should be cleared.
Cache line fill. These bits control the size of the memory request the cache issues to the
bus controller for different initial instruction line access offsets. See
fetch size based on miss address and CLNF.
Default write protection
Section 5.1.3.2, “Memory Reference
describes how to set the cache invalidate all bit.
describes how to set the cache invalidate all bit.
MCF5235 Reference Manual, Rev. 2
Section 3.2.3.2, “Supervisor/User Stack Pointers (A7 and
Description
Attributes.
Memory Map/Register Definition
Table 5-1
Table
5-2.
for external
5-9