SBAS813 June 2018 ADS8688AT
PRODUCTION DATA.
The bits in this register can be used to configure the device ID for daisy-chain operation, enable the ALARM feature, and configure the output bit format on SDO.
7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
DEV[1:0] | 0 | ALARM_EN | 0 | SDO[2:0] | |||
R/W-0h | R-0h | R/W-0h | R-0h | R/W-0h |
Bit | Field | Type | Reset | Description |
---|---|---|---|---|
7-6 | DEV[1:0] | R/W | 0h | Device ID bits.
00 = ID for device 0 in daisy-chain mode 01 = ID for device 1 in daisy-chain mode 10 = ID for device 2 in daisy-chain mode 11 = ID for device 3 in daisy-chain mode |
5 | 0 | R | 0h | Must always be set to 0 |
4 | 0 | R/W | 0h | ALARM feature enable.
0 = ALARM feature is disabled 1 = ALARM feature is enabled |
3 | 0 | R | 0h | Must always be set to 0 |
2-0 | SDO[2:0] | R/W | 0h | SDO data format bits (see Table 14). |
SDO FORMAT
SDO[2:0] |
BEGINNING OF THE OUTPUT BIT STREAM | OUTPUT FORMAT | |||||
---|---|---|---|---|---|---|---|
BITS 24-9 | BITS 8-5 | BITS 4-3 | BITS 2-0 | ||||
000 | 16th SCLK falling edge,
no latency |
Conversion result for selected channel (MSB-first) | SDO pulled low | ||||
001 | 16th SCLK falling edge,
no latency |
Conversion result for selected channel (MSB-first) | Channel address(1) | SDO pulled low | |||
010 | 16th SCLK falling edge,
no latency |
Conversion result for selected channel (MSB-first) | Channel address(1) | Device address(1) | SDO pulled low | ||
011 | 16th SCLK falling edge,
no latency |
Conversion result for selected channel (MSB-first) | Channel address(1) | Device address(1) | Input range(1) |
BIT | BIT DESCRIPTION |
---|---|
24-9 | 16 bits of conversion result for the channel represented in MSB-first format. |
8-5 | Four bits of channel address.
0000 = Channel 0 0001 = Channel 1 0010 = Channel 2 0011 = Channel 3 0100 = Channel 4 0101 = Channel 5 0110 = Channel 6 0111 = Channel 7 |
4-3 | Two bits of device address (mainly useful in daisy-chain mode). |
2-0 | Three LSB bits of input voltage range (see the range select registers). |