AN2184 Freescale Semiconductor / Motorola, AN2184 Datasheet - Page 24

• Manufacturer Part Number: AN2184
• Description: MCF5272 Interrupt Service Routine for the Physical Layer Interface Controller
• Manufacturer: Freescale Semiconductor / Motorola

7.5 MBAR Configuration
This is one of the first registers that should be written after reset. MBAR configuration is arbitrarily set by
the user.
7.6 Hardware Configuration
The evaluation board that is used in this setup is the M5272C3. The four ports are available through PCI
sockets on the evaluation board. Be sure that, in addition to supplying the evaluation board with power, the
user supplies 5V to J7, which supplies power to the daughter cards connected into the PCI sockets. The
wire connection between the PC and the board is a BDM wiggler cable. Depending on the tested registers,
the external environment could be either MC145572EVK (U Transceiver-oriented board) or
MC145574EVK (T transceiver-oriented board). Along with the M5272C3 board, daughter cards will be
plugged into these PCI sockets. Most of the time, the T2 daughter boards will be plugged in to evaluate
multi-port functionality, D channel access, and other features. The U2 daughter card will be used for IDL
BER measurement. The BER tester is the HP1645A, which is directly connected to either the
MC145572EVK or MC145574EVK. The hardware setup is as follows:
Assembly Code MBAR Configuration
24
Bits
7–5
4–0
IV7–IV5
Name
—
Reset
Interrupt vectors 7–5. These bits provide the three MSB’s of the interrupt vector for
interrupt acknowledge cycles from all sources. To conform to ColdFire interrupt
vector allocation these bits should be set equal to or greater than 010. This is the
same as writing a value of 0x40 to the register.
Reserved, should be cleared.
Write
Read
Figure 19. Programmable Interrupt Vector Register
Freescale Semiconductor, Inc.
For More Information On This Product,
IV7
IV7
Table 5. PIV Register Field Descriptions
7
MCF5272 Interrupt Service Routine
IV6
IV6
6
Go to: www.freescale.com
IV5
IV5
5
0000_1111
4
Description
3
0_1111
—
2
MBASE+0x3C
1
0