SFFS056A March 2021 – December 2021 DRV8243-Q1
4.2 SPI "S" variant in VQFN-HR package
Figure 4-3shows the pin diagram. For a detailed description of the device pins please refer to the Pin Configuration and Functions section in the DRV8243-Q1 data sheet.
Figure 4-3 SPI "S" variantTable 4-6 Pin FMA for Device Pins
Short-Circuited to Ground
| Pin | Description of Potential Failure Effect(s) | Failure Effect Class | |
|---|---|---|---|
| No. | Name | ||
| 1 | nFAULT | False fault signalling possible. Device will continue to operate as commanded. | B |
| 2 | IPROPI | IPROPI feedback is lost. ITRIP regulation, if enabled, is also lost. | B |
| 3 | nSLEEP | Device will be in SLEEP state and outputs are Hi-Z. | B |
| 4 | VM | Device is powered off with driver Hi-Z. | B |
| 5 | OUT2 | If OUT2 is commanded to be pulled high, short is detected and outputs are Hi-Z. | B |
| 6 | GND | Normal function. | D |
| 7 | OUT1 | If OUT1 is commanded to be pulled high, short is detected and outputs are Hi-Z. | B |
| 8 | DRVOFF | Pin based shutoff function is lost. | B |
| 9 | EN/IN1 | Load will be in re-circulation (braking). No risk of spin direction reversal. | B |
| 10 | PH/IN2 | Normal function as register bit is used for direction control. | D |
| 11 | nSCS | SPI communication is lost. | B |
| 12 | SCLK | SPI communication is lost. | B |
| 13 | SDI | SPI communication is lost. | B |
| 14 | SDO | SPI communication is lost. | B |
Table 4-7 Pin FMA for Device Pins
Open-Circuited
| Pin | Description of Potential Failure Effect(s) | Failure Effect Class | |
|---|---|---|---|
| No. | Name | ||
| 1 | nFAULT | False fault signaling possible. Device will continue to operate as commanded. | B |
| 2 | IPROPI | IPROPI feedback is lost. Load will be forced to recirculate if ITRIP regulation is enabled. | B |
| 3 | nSLEEP | Device will be in SLEEP state and outputs are Hi-Z. | B |
| 4 | VM | Device is powered off with driver Hi-Z. | B |
| 5 | OUT2 | Load drive capability is lost. | B |
| 6 | GND | Device is powered off with driver Hi-Z. | B |
| 7 | OUT1 | Load drive capability is lost. | B |
| 8 | DRVOFF | Pin based shutoff is triggered and outputs are Hi-Z. | B |
| 9 | EN/IN1 | Load will be in re-circulation (braking). No risk of spin direction reversal. | B |
| 10 | PH/IN2 | Normal function as register bit is used for direction control. | D |
| 11 | nSCS | SPI communication is lost. | B |
| 12 | SCLK | SPI communication is lost. | B |
| 13 | SDI | SPI communication is lost. | B |
| 14 | SDO | SPI communication is lost. | B |
Table 4-8 Pin FMA for Device Pins
Short-Circuited to Adjacent Pin
| Short between pins | Description of Potential Failure Effect(s) | Failure Effect Class | |
|---|---|---|---|
| nFAULT | SDO | False fault signaling possible. SPI communication will be affected during fault assertion. | B |
| IPROPI | nFAULT | False fault signaling possible. IPROPI feedback is inaccurate. ITRIP regulation levels, if enabled, will be lower. | B |
| nSLEEP | IPROPI | IPROPI feedback is inaccurate. ITRIP regulation levels, if enabled, will be lower. | B |
| VM | nSLEEP | SLEEP functionality is lost. | B |
| OUT2 | VM | If OUT2 is commanded to be pulled low, short is detected and outputs are Hi-Z. | B |
| GND | OUT2 | If OUT2 is commanded to be pulled high, short is detected and outputs are Hi-Z. | B |
| OUT1 | GND | If OUT1 is commanded to be pulled high, short is detected and outputs are Hi-Z. | B |
| VM | OUT1 | If OUT1 is commanded to be pulled low, short is detected and outputs are Hi-Z | B |
| DRVOFF | VM | Outputs are Hi-Z. | B |
| EN/IN1 | DRVOFF | Outputs are either Hi-Z or load is in re-circulation state. | B |
| PH/IN2 | EN/IN1 | External PWM control is lost. Internal ITRIP regulation is OK. No risk of spin direction reversal. | D |
| nSCS | PH/IN2 | Normal function as register bit is used for direction control. | D |
| SCLK | nSCS | SPI communication is lost. | B |
| SDI | SCLK | SPI communication is lost. | B |
| SDO | SDI | SPI communication is lost. | B |
Table 4-9 Pin FMA for Device Pins
Short-Circuited to VM
| Pin | Description of Potential Failure Effect(s) | Failure Effect Class | |
|---|---|---|---|
| No. | Name | ||
| 1 | nFAULT | Device damage possible. | A |
| 2 | IPROPI | Device damage possible. | A |
| 3 | nSLEEP | SLEEP functionality is lost. | B |
| 4 | VM | Normal function. | D |
| 5 | OUT2 | If OUT2 is commanded to be pulled low, short is detected and outputs are Hi-Z. | B |
| 6 | GND | Device is powered off with driver Hi-Z. | B |
| 7 | OUT1 | If OUT1 is commanded to be pulled low, short is detected and outputs are Hi-Z. | B |
| 8 | DRVOFF | Outputs are Hi-Z. | B |
| 9 | EN/IN1 | Device damage possible. | A |
| 10 | PH/IN2 | Device damage possible. | A |
| 11 | nSCS | Device damage possible. | A |
| 12 | SCLK | Device damage possible. | A |
| 13 | SDI | Device damage possible. | A |
| 14 | SDO | Device damage possible. | A |