MOD5234-100IR NetBurner Inc, MOD5234-100IR Datasheet - Page 314

• 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

Chip Select Module
Table 16-2
16.3.1.1 8-, 16-, and 32-Bit Port Sizing
Static bus sizing is programmable through the port size bits, CSCR[PS]. See Section 16.4.1.3 for
more information.
byte strobe control lines (BS[3:0]). Note that all byte lanes are driven, although the state of unused
byte lanes is undefined.
16.3.2 Enhanced Wait State Operation
The chip-select logic has been enhanced to add the notion of secondary wait-state counter values
to be used after the initial wait-state value (where the existing wait state field becomes the initial
access wait state) is applied to the first access. Two fields in the Chip-Select Control Registers
16-4
Number of CSCR Matches
shows the type of access as a function of match in the CSARs and DACRs.
Figure 16-1. Connections for External Memory Port Sizes
Table 16-2. Accesses by Matches in CSARs and DACRs
Multiple
Multiple
Multiple
Figure 16-1
0
1
0
1
0
1
32-bit port
16-bit port
8-bit port
data bus
External
memory
memory
memory
shows the correspondence between the data bus and the external
MCF5235 Reference Manual, Rev. 2
Number of DACR Matches
D[31:24]
Byte 0
Byte 0
Byte 2
Byte 0
Byte 1
Byte 2
Byte 3
BS3
Multiple
Multiple
Multiple
0
0
0
1
1
1
D[23:16]
Byte 1
Byte 1
Byte 3
BS2
Driven, undefined
D[15:8]
Byte 2
Driven, undefined
BS1
External, burst-inhibited, 32-bit
Byte 3
D[7:0]
Defined by DACRs
BS0
Defined by CSAR
Type of Access
Undefined
Undefined
Undefined
Undefined
Undefined
External
Freescale Semiconductor