500-003111-000
4-3
CONTROL
BIT
NAME
FUNCTION
D8
MODE A0 H
D8, D9, and D10 control the analog
input mode, and are described in
Section 4-4.
D9
MODE A1 H
D10
MODE A2 H
D11
OUTPUT ONLINE H
If D11 is set high "1," the analog outputs
are connected to the P2 I/O connector.
The analog outputs are disabled
disconnected from P2 if D11 is low "0."
D12
TWO'S COMPL L
ADC coding format is Binary if D12 is high
"1," Two's Complement if D12 is low "0."
D13 *
EN START CONV H
A single A/D conversion is enabled each
time a "1" is written to this control bit. D13
will be ignored if the Converter Data
Register (Table 4.1-1) contains unread
data from a previous conversion. The
current settling sequence will be sustained
until the Converter Data Register is READ.
D14
FAIL LED L
The Fail LED is OFF if this bit is set to "1,"
and is ON if the bit is "0."
D15*
ENA EXT TRIG H
If this bit is set, it enables the P2 EXT TRIG
L input signal to control the ADC. This
permits external initiation of an ADC.
*Each control bit is mapped directly into the corresponding bit in the Status Register unless it is
indicated with "*."
M3111/T4.2-1/2
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