MOD5234-100IR NetBurner Inc, MOD5234-100IR Datasheet - Page 219

• 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

the two writes. If the CWT has already timed out, writing to this register has no effect in negating
the CWT interrupt.
uninitialized.
11.3 Internal Bus Arbitration
The internal bus arbitration is performed by the on-chip bus arbiter, which containing the
arbitration logic that controls which of up to four MBus masters (M0–M3 in
access to the external buses. The function of the arbitration logic is described in this section.
11.3.1 Overview
The basic functionality is that of a 4-port, pipelined internal bus arbitration module with the
following attributes:
Freescale Semiconductor
Address
Figure 11-5. Core Watchdog Service Register (CWSR)
Reset
Figure 11-5
W
R
DMA
CPU
FEC
—
7
Figure 11-6. Arbiter Module Functions
M3
SRAM1
M0
M2
illustrates the CWSR. At system reset, the contents of CWSR are
—
MCF5235 Reference Manual, Rev. 2
6
“back door” to SRAM
MARB
—
5
MPARK
IPSBAR + 0x013
—
CWSR[7:0]
4
—
3
Modules
Internal
SDRAMC
EIM
RAMBAR
—
2
—
1
—
0
Internal Bus Arbitration
Figure
11-6) has
11-9