SLASF77A December 2022 – September 2023 AFE11612-SEP
PRODUCTION DATA
Four analog auxiliary inputs (CH0, CH1, CH2, and CH3) and three temperature sensors (LT, D1, and D2; see Section 7.6.24) implement an out-of-range alarm function. Threshold-High-n and Threshold-Low-n (where n = 0, 1, 2, 3) define the upper bound and lower bound of the nth analog input range, as shown in Table 7-40. This window determines whether the nth input is out-of-range. When the input is outside the window, the corresponding CH-ALR-n bit in the status register is set to 1.
For normal operation, the value of Threshold-High-n must be greater than the value of Threshold-Low-n; otherwise, CH-ALR-n is always set to 1 and an alarm is always indicated. When the analog channel is accessed as single-ended input, the analog-channel threshold is in a straight binary format. However, when the channel is accessed as a differential pair, the threshold is in 2's complement format.
INPUT CHANNEL | INPUT TYPE | THRESHOLD STORED IN | FORMAT |
---|---|---|---|
Channel 0 | Single-ended | Input-0-Threshold-High-Byte Input-0-Threshold-Low-Byte | Straight binary |
Channel 1 | Single-ended | Input-1-Threshold-High-Byte Input-1-Threshold-Low-Byte | Straight binary |
Channel 2 | Single-ended | Input-2-Threshold-High-Byte Input-2-Threshold-Low-Byte | Straight binary |
Channel 3 | Single-ended | Input-3-Threshold-High-Byte Input-3-Threshold-Low-Byte | Straight binary |
CH0+, CH1– | Differential | Input-0-Threshold-High-Byte Input-0-Threshold-Low-Byte | 2's complement |
CH2+, CH3– | Differential | Input-2-Threshold-High-Byte Input-2-Threshold-Low-Byte | 2's complement |