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75 Appendix C
C.16 Clear FIFO Interrupt Request — BASE+14H
Write any value to this I/O port to clear the FIFO's interrupt request.
C.17 A/D Data and Channel from FIFO - BASE + 17/18H
The PCL-818HD/HG stores data from A/D conversions in a 1 K word
First-In First-Out (FIFO) data buffer. Registers at BASE+17H and
BASE+18H store the channel number and data. The register at
BASE+19H clears the FIFO buffer and sets its empty flag (EF).
AD11 ~ AD0 Analog to digital data
AD0 The least significant bit (LSB) of the A/D data
AD11 The most significant bit (MSB)
C3 ~ C0 A/D channel number from which the data is derived
C0 The least significant bit (LSB) of the channels
C3 The most significant bit (MSB)
Table C.17: Register for Clear FIFO Interrupt Request
Write Clear FIFO Interrupt Request
Bit # 76543210
BASE + 14H X X X X XXXX
Table C.18: Register for A/D Data and Channel from FIFO
Read A/D data and channels from FIFO
Bit # 7 6 543210
BASE + 17H AD3 AD2 AD1 AD0 C3 C2 C1 C0
BASE + 18H AD11 AD10 AD9 AD8 AD7 AD6 AD5 AD4