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The A/D Parallel Strobe Register base +0B
16
The A/D parallel strobe register is a write only register that latches the A/D
configuration held by the A/D shift register to the analog-to-digital
converter.
Address 76543210
base + 0B
16
not used 0 - idle
1 - strobe
not used
Setting bit 2 to ’1’ latches the configuration represented by the bits in the
A/D shift register to the A/D. Only one strobe is required.
The A/D Shift Register
The A/D shift register is a 56-bit serial register used to configure various
parameters of the digitizer. The register does not have an A24 address since
it is accessed using the A/D serial register and the A/D strobe register as
shown in Figure C-2.
Each time the configuration is changed, all 56 bits must be written to the
shift register from the A/D serial register (base +05
16
). The configuration
is then latched to the A/D with a single write to the A/D strobe register
(base + 0B
16
). The bits of the shift register are defined as follows. Only the
unshaded bits are covered in this appendix. Bits 55 - 52 are undefined and
are not shown.
Appendix C Register Programming 351