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6 optional serial i/o -15, 7 pci bus -15 – Brother 1270N User Manual

Page 57

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CHAPTER 3 THEORY OF OPERATION

3-15

1.3.6

Optional serial I/O

The interrupt of the serial I/O is input to the EXINT terminal of the ASIC, and is recognized by
the CPU. A 32-byte register is provided for this I/O, which is read from and written to by the
CPU.

Fig. 3-16

1.3.7

PCI bus

The interface of the PCI bus is PCI specification revision 2.2 compliant.

Fig. 3-17

HL-1250

HL-1270N

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