MCF5272VF66 Freescale, MCF5272VF66 Datasheet - Page 241

• Manufacturer Part Number: MCF5272VF66
• Manufacturer: Freescale

Specifications of MCF5272VF66

• Family Name: MCF5xxx
• Device Core: ColdFire
• Device Core Size: 32b
• Frequency (max): 66MHz
• Instruction Set Architecture: RISC
• Supply Voltage 1 (typ): 3.3V
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 196
• Package Type: MA-BGA
• Lead Free Status / RoHS Status: Not Compliant

11.5.13 Receive Control Register (RCR)
The RCR register,
Table 11-20
Freescale Semiconductor
31–4
Bits
Reset
Reset
3
2
1
0
Field
Field
Addr
R/W
R/W
31
15
describes the RCR fields.
MII_MODE
PROM
Name
LOOP
DRT
Figure
—
MCF5272 ColdFire
11-17, controls the operational mode of the receive block.
Reserved, should be cleared.
Promiscuous mode. All frames are accepted regardless of address matching.
MII mode enable. Selects the external interface mode. Setting this bit to one selects MII
mode, setting this bit equal to zero selects seven-wire mode (used only for serial 10 Mbps).
This bit controls the interface mode for both transmit and receive blocks.
Disable receive on transmit
0 Receive path operates independently of transmit (use for full duplex or to monitor transmit
activity in half-duplex mode).
1 Disable reception of frames while transmitting (normally used for half-duplex mode).
Internal loopback. If set, transmitted frames are looped back internal to the FEC and the
transmit output signals are not asserted. The system clock is substituted for the E_TxCLK
when LOOP is asserted. DRT must be set to zero when asserting LOOP.
Figure 11-17. Receive Control Register (RCR)
Table 11-20. RCR Field Descriptions
®
Integrated Microprocessor User’s Manual, Rev. 3
—
0000_0000_0000_0000
0000_0000_0000_0000
MBAR + 0x944
Read/Write
Read/Write
—
Description
4
PROM MII_MODE DRT LOOP
3
2
1
Ethernet Module
16
0
11-23