The A/D Gain Channel Register; Figure 1-13. Digout Output Register - Brainboxes AD-1200 H User Manual

Analog Relay Mux Board
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The A/D Gain Channel Register.

The A/D Gain Channel Register, ADGCR, is used to select
the input channel to the A/D converter and the gain applied to
the input signal by the programmable gain amplifier.
When in Mode 0, single conversion mode, then writing to the
A/D Gain Channel Register forces the A/D Converter to start its
next conversion.
_____________________________ The Digital Output Port Register.
The Digital Output Port Register, DIGOUT, is an 8 bit
write only register. The bit values written correspond exactly
with the on/off logic state of the 8 TTL output lines. Thus bits
set true force the corresponding DIGOUT line high, those bits
set false force the DIGOUT line low.
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Figure 1-13. DIGOUT Output Register.

DIGOUT Digital Output Port Register.
BIT 7
021E DIGOUT DIGOUT DIGOUT DIGOUT DIGOUT DIGOUT DIGOUT DIGOUT
Hex 7
Write
Writing 0FFhex to the DIGOUT register forces all lines
high, writing 00hex forces lines low. Writing 01hex forces only
DIGOUT bit 0 high, all the rest are low.
TTL output logic level low is 0.0 ~0.8 Volts.
TTL output logic level high is 2.4 ~5.0 Volts.
___________________________ _ The Digital Input Port Register.
The Digital Input Port Register, DIGIN, is an 8 bit read
only register. The bit values read represent the logic levels
present on the 8 TTL input lines. Thus lines that are high cause
the corresponding DIGIN bit to read high, those lines that are
BIT 6 BIT 5
6 5
Write Write
BIT 4 BIT 3
4 3
Write Write
Reference
__________ Write Only
BIT 2 BIT 1
2 1
Write Write
_________ _ Read Only
Page 15
BIT 0
0
Write