Print Engine Interface
10-6
MC68322 USER’S MANUAL
MOTOROLA
The page image bit address fields hold the starting address of the band image to be printed.
This address is a bit address and points to the first bit of data to be transmitted to the print
engine. Loading the page image bit address fields is also the stimulus that starts the PVC
and initiates a print operation. The values of all other PCB registers must be set before the
page image bit address register is loaded.
10.1.4 PVC Interrupt Event Register
The PVC interrupt event register (PVCIR) contains five bits that indicate PVC interrupts
events, two that report normal events (band begin and page end), and three that report
errors (video under, band under, and PVC error). A PVC error interrupt event results from
an illegal address or out-of-range address. If an error is detected by the PVC during the
processing of the PCB register set, it sets one of these five interrupt sources in the PVCIR.
After any of these interrupts occur, the PVC’s operation is undefined and must be
immediately reset by the module soft reset register’s (MSRR) PVC bit to return it to normal
operation.
Figure 10-4. PVC Interrupt Event Register
BSY—PVC Busy
This bit indicates when the PVC is executing a print operation.
PFL—PCB Full
This bit indicates when the PCB register set is available for a new print operation. The PCB
registers should only be loaded when the PFL bit is clear. When the PFL bit is set, the PCB
register set should not be altered.
Note: It is not recommended that you change the SmartToner options in the PVCCR
(SLC, SRC, and SDN bits) while printing a page.
Note: The PVCIR is located in the interrupt register portion of the memory map and,
therefore, is not necessarily located contiguously with the other print engine
interface registers.
= RESERVED
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65432
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0
BSY PFL PBB PGE BUD VUD ILA
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65432
1
0
ENABLE
INTERRUPT
LEVEL
00FFF700
00FFF702
00FFF704
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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