Board Configuration
2-11
10003794-05
is configured (1=Monarch, 0=non-Monarch), as determined by the signal on pin
64 of connector P12. The software can read the Monarch line status to configure
the board without affecting the hardware.
The EReady register (see Register Map 5-1) at location C100,0010
16
has an addi-
tional bit to support Monarch functionality. Bit 0, ERdy, monitors the READY
line. For a non-Monarch, the presumption is that this signal is initially asserted,
then removed when the bus is ready for enumeration. When all the other PCI
devices have stopped driving this signal low, the Monarch will enumerate the
bus. Please see the draft PPMC standard (reference in Table 1-2) for carrier board
pull-up requirements.
2.7 Board Configuration
The PmPPC440 has a register that provides configuration information about the
board. The read-only Board Configuration register at C100,0020
16
identifies
whether or not the board is a Monarch and whether or not it boots from the
Development Mezzanine Card (DMC), as follows:
To facilitate development, the PmPPC440 also has several read-only registers that
contain identification and version information. The Product Identification regis-
ter at C100,0014
16
holds a four-bit value that represents a unique identification
number for the PmPPC440. The Hardware Version register at C100,0018
16
con-
tains a hard-coded four-bit value that identifies the hardware version. The PLD
Version register at C100,001C
16
contains a hard-coded four-bit value that identi-
fies the programmable logic device’s code version.
3
2
1
0
reserved
Monarch
DMC
Register Map 2-5. Board Configuration
Monarch
1 = Monarch, 0 = non-Monarch
DMC
1 = boot from PLCC on DMC, 0 = boot from PMC
Содержание PmPPC440
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Страница 24: ...2 4 PmPPC440 Setup April 2005 Figure 2 3 Component Map Bottom Rev 02 P1 DMC Connector U19 MSC PLD ...
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Страница 56: ...6 4 PmPPC440 Ethernet Interface April 2005 ...
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