40
3.13) OPTORD3 - Optically Isolated Input Port Register 3 (offset 26, read only)
The register allows one to read the status of Opto Isolator 48 to 63. It is only valid when
the expansion board (PC62C-EXP32) is connected to the PC62C. The Register structure
is described below.
OPTORD3 Register (read only)
Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8
PE15 PE14 PE13 PE12 PE11 PE10 PE9 PE8
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
PE7 PE6 PE5 PE4 PE3 PE2 PE1 PE0
Bit 0 to 7: The bits PE0 to PE7 reflect the status of optically isolated input lines 48 to 55.
This register is only valid if the expansion board is connected to the PC62C
Bit 8 to 15: The bits PE8 to PE15 reflect the status of optically isolated input lines 56 to 63.
This register is only valid if the expansion board is connected to the PC62C.
It is recommended that a 16 bit read is initiated when reading the status of the
Port. Note, however, that two 8 bit reads can also be performed. This feature
was included in order to maintain compatibility with the PC62B.
