MOD5234-100IR NetBurner Inc, MOD5234-100IR Datasheet - Page 311

• 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

Chapter 16
Chip Select Module
16.1 Introduction
This chapter describes the chip select module, including the operation and programming model of
the chip select registers, which include the chip select address, mask, and control registers.
16.1.1 Overview
The following list summarizes the key chip select features:
16.2 External Signal Description
This section describes the signals used by the chip select module.
16.2.1 Chip Selects (CS[7:0])
Each CSn can be independently programmed for an address location as well as for masking, port
size, read/write burst capability, wait-state generation, and internal/external termination. Only CS0
is initialized at reset and may act as an external boot chip select to allow boot ROM to be at an
external address space. Port size for CS0 is configured by the logic levels of D[20:19] when
RSTOUT negates and RCON is asserted.
16.2.2 Output Enable (OE)
Interfaces to memory or to peripheral devices and enables a read transfer. It is asserted and negated
on the falling edge of the clock. OE is asserted only when one of the chip selects matches for the
current address decode.
Freescale Semiconductor
• Eight independent, user-programmable chip select signals (CS[7:0]) that can interface with
• Address masking for 64-Kbyte to 4-Gbyte memory block sizes
• Enhanced secondary wait states
• Access error on writes to write-protect (WP) region
external SRAM, PROM, EPROM, EEPROM, Flash, and peripherals
Unless otherwise noted, in this chapter, “clock” refers to the CLKOUT
used for the bus (f
sys/2
MCF5235 Reference Manual, Rev. 2
).
NOTE
16-1