MCF5272VF66 Freescale, MCF5272VF66 Datasheet - Page 328

• 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

Physical Layer Interface Controller (PLIC)
13.5.20 D-Channel Request Register (PDRQR)
All bits in this read/write register are cleared on hardware or software reset.
The PDRQR register contains D-channel control bits for all four ports on the MCF5272.
13-32
15–12
11, 9
10, 8
Bits
7–2
1–0
Reset
Field
Addr
R/W
15
DCNTI
SHDD
Name
DRQ
—
—
—
MCF5272 ColdFire
Reserved, should be cleared.
D-channel shift direction.
0 D-channel data is msb first. The first bit received is assumed to be the most significant bit and is
1 D-channel data is lsb first for the D channel. The first bit received is assumed to be the least
D-channel control ignore. Allows the D-Channel contention function to be ignored.
Reserved, should be cleared.
The value written to these bits is driven onto the DREQ pins associated with port 0 and port 1. When
set, a logic high, 1, is driven on to the corresponding pin.
12
loaded into the msb position of the D-channel receive register for the respective port. SHDD(1)
configures the shift direction for ports 1, 2 and 3, SHDD(0) configures the shift direction for port 0.
significant bit and is loaded into the lsb position of the D-channel receive register for the
respective port.
00 contention active on both ports
01 ignore contention on port 0
10 ignore contention on port 1
11 ignore contention on both ports
Figure 13-32. D-Channel Request Registers (PDRQR)
SHDD(1) DCNTI(1) SHDD(0) DCNTI(0)
11
Table 13-15. PDRQR Field Descriptions
®
Integrated Microprocessor User’s Manual, Rev. 3
10
0000_0000_0000_0000
MBAR + 0x392
9
Read/Write
Description
8
7
—
2
Freescale Semiconductor
1
DRQ
0