SFFS057A March 2021 – December 2021 DRV8244-Q1
Figure 4-2 shows the pin diagram. For a detailed description of the device pins please refer to the Pin Configuration and Functions section in the DRV8244-Q1 data sheet.
| Pin | Description of Potential Failure Effect(s) | Failure Effect Class | |
|---|---|---|---|
| No. | Name | ||
| 1 | SCLK | SPI communication is lost. | B |
| 2 | nSCS | SPI communication is lost. | B |
| 3 | PH/IN2 | Normal function as register bit is used for direction control. | D |
| 4 | EN/IN1 | Load will be in re-circulation (braking). No risk of spin direction reversal. | B |
| 5 | DRVOFF | Pin based shutoff function is lost. | B |
| 6, 7, 8, 21, 22, 23 | VM | Device is powered off with driver Hi-Z. | B |
| 9, 10, 11 | OUT1 | If OUT1 is commanded to be pulled high, short is detected and outputs are Hi-Z. | B |
| 12, 13, 14, 15, 16, 17 | GND | Normal function. | D |
| 18, 19, 20 | OUT2 | If OUT2 is commanded to be pulled high, short is detected and outputs are Hi-Z. | B |
| 24 | nSLEEP | Both "S" & "P" variants: Device will be in SLEEP state and outputs are Hi-Z. | B |
| VDD | |||
| 25 | IPROPI | IPROPI feedback is lost. ITRIP regulation, if enabled, is also lost. | B |
| 26 | nFAULT | False fault signalling possible. Device will continue to operate as commanded. | B |
| 27 | SDO | SPI communication is lost. | B |
| 28 | SDI | SPI communication is lost. | B |
| Pin | Description of Potential Failure Effect(s) | Failure Effect Class | |
|---|---|---|---|
| No. | Name | ||
| 1 | SCLK | SPI communication is lost. | B |
| 2 | nSCS | SPI communication is lost. | B |
| 3 | PH/IN2 | Normal function as register bit is used for direction control. | D |
| 4 | EN/IN1 | Load will be in re-circulation (braking). No risk of spin direction reversal. | B |
| 5 | DRVOFF | Pin based shutoff is triggered and outputs are Hi-Z. | B |
| 6, 7, 8, 21, 22, 23 | VM | Device is powered off with driver Hi-Z. | B |
| 9, 10, 11 | OUT1 | Load drive capability is lost. | B |
| 12, 13, 14, 15, 16, 17 | GND | Device is powered off with driver Hi-Z. | B |
| 18, 19, 20 | OUT2 | Load drive capability is lost. | B |
| 24 | nSLEEP | Both "S" & "P" variants: Device will be in SLEEP state and outputs are Hi-Z. | B |
| VDD | |||
| 25 | IPROPI | IPROPI feedback is lost. Load will be forced to recirculate if ITRIP regulation is enabled. | B |
| 26 | nFAULT | False fault signaling possible. Device will continue to operate as commanded. | B |
| 27 | SDO | SPI communication is lost. | B |
| 28 | SDI | SPI communication is lost. | B |
| Short between pins | Description of Potential Failure Effect(s) | Failure Effect Class | |
|---|---|---|---|
| SCLK | SDI | SPI communication is lost. | B |
| nSCS | SCLK | SPI communication is lost. | B |
| PH/IN2 | nSCS | Normal function as register bit is used for direction control. | D |
| EN/IN1 | PH/IN2 | External PWM control is lost. Internal ITRIP regulation is OK. No risk of spin direction reversal. | D |
| DRVOFF | EN/IN1 | Outputs are either Hi-Z or load is in re-circulation state. | B |
| VM | DRVOFF | Outputs are Hi-Z. | B |
| OUT1 | VM | If OUT1 is commanded to be pulled low, short is detected and outputs are Hi-Z | B |
| GND | OUT1 | If OUT1 is commanded to be pulled high, short is detected and outputs are Hi-Z. | B |
| OUT2 | GND | If OUT2 is commanded to be pulled high, short is detected and outputs are Hi-Z. | B |
| VM | OUT2 | If OUT2 is commanded to be pulled low, short is detected and outputs are Hi-Z. | B |
| nSLEEP | VM | "S" variant: SLEEP functionality is lost | B |
| VDD | "P" variant: Device damage possible. Device behavior can not be guaranteed. | A | |
| IPROPI | nSLEEP | "S" variant: IPROPI feedback is inaccurate. ITRIP regulation levels, if enabled, will be lower. | B |
| VDD | "P" variant: IPROPI feedback is inaccurate. Outputs are Hi-Z if ITRIP regulation is enabled. | ||
| nFAULT | IPROPI | False fault signaling possible. IPROPI feedback is inaccurate. ITRIP regulation levels, if enabled, will be lower. | B |
| SDO | nFAULT | False fault signaling possible. SPI communication will be affected during fault assertion. | B |
| SDI | SDO | SPI communication is lost. | B |
| Pin | Description of Potential Failure Effect(s) | Failure Effect Class | |
|---|---|---|---|
| No. | Name | ||
| 1 | SCLK | Device damage possible. | A |
| 2 | nSCS | Device damage possible. | A |
| 3 | PH/IN2 | Device damage possible. | A |
| 4 | EN/IN1 | Device damage possible. | A |
| 5 | DRVOFF | Outputs are Hi-Z. | B |
| 6, 7, 8, 21, 22, 23 | VM | Normal function. | D |
| 9, 10, 11 | OUT1 | If OUT1 is commanded to be pulled low, short is detected and outputs are Hi-Z. | B |
| 12, 13, 14, 15, 16, 17 | GND | Device is powered off with driver Hi-Z. | B |
| 18, 19, 20 | OUT2 | If OUT2 is commanded to be pulled low, short is detected and outputs are Hi-Z. | B |
| 24 | nSLEEP | "S" variant: SLEEP functionality is lost. | B |
| VDD | "P" variant: Device damage possible. | A | |
| 25 | IPROPI | Device damage possible. | A |
| 26 | nFAULT | Device damage possible. | A |
| 27 | SDO | Device damage possible. | A |
| 28 | SDI | Device damage possible. | A |