MCIMX27ADSE Freescale Semiconductor, MCIMX27ADSE Datasheet - Page 25

• Manufacturer Part Number: MCIMX27ADSE
• Description: KIT APPLICATION DEV ADS I.MX27
• Manufacturer: Freescale Semiconductor
• Series: i.MXr
• Type: Microcontrollerr

Specifications of MCIMX27ADSE

• Contents: Main Board, LCD Panel, Keypad, NAND Flash Card, Image Sensor and TV Encoder Card
• Silicon Manufacturer: Freescale
• Core Architecture: ARM
• Core Sub-architecture: ARM9
• Silicon Core Number: I.MX2
• Silicon Family Name: I.MX27
• Supported Devices: I.MX27
• Rohs Compliant: Yes
• For Use With/related Products: i.MX27
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

2.3.11
The ADS provides a Ethernet interface (10/100BASE-T) that uses an AMD AM79C874VD transceiver
connected to an RJ45 connector, T3. It can operate on 10MHz and 100Mbps Ethernet / IEEE 802.3
networks. The FEC supports 10/100Mbps MII and 10Mbps-only 7-wire interface. Figure 2-10 shows the
USB HOST interface connection.
2.3.12
The ADS provides a 1-Wire EEPROM (U98) that uses a MAXIM DS2433. This is a 4K bits 1-Wire
EEPROM. The power to read and write the EEPROM is derived entirely from the i.MX27 1-Wire interface
(RTCK/OWIRE pin). However, this pin is also used in the CPLD and Multi-ICE. Figure 2-11 shows the
1-Wire EEPROM and other devices connected to this pin. The ADS cannot support all these devices
simultaneously. In the default factory setting, the RTCK/OWIRE pin is connected to CPLD via a resistor
(R501) for the CS8900 DMA request. If the user needs to test the 1-Wire EEPROM or Multi-ICE RTCK
function, R501 must be removed and set the jumper JP62 (see Table 2-9).
Freescale Semiconductor
Fast Ethernet Controller (FEC) Interface
1-Wire EEPROM
i.MX27
(U1)
ATA_D[15:0]
Figure 2-11. 1-Wire Interface and other connections
Figure 2-10. Fast Ethernet Controller Interface
RTCK/OWIRE
i.MX27
(U1)
MCIMX27ADSE User’s Manual, Rev. A
Demux Bus
(U46, U49,
U50, U51)
Switch
FEC signals
ATA signals
R501
JP62
OWIRE
RTCK
GPIO
MII
CS8900 DMA
RQ
DATA
RTCK_JTAG
ATA module
AM79C874
NetPHY
(U48)
Connector
EEPROM
Multi-ICE
1-Wire
CPLD
(U92)
(U98)
J89
Connector
Configuration and Operation
RJ45
(T3)
2-11