JAJSGQ7A December 2018 – January 2020 TCAN4550
PRODUCTION DATA.
The TCAN4550 has several operating modes: normal, standby, and sleep modes and two protected modes. The first three mode selections are made by the SPI register. The two protected modes are modified standby modes used to protect the device or bus. The TCAN4550 automatically goes from sleep to standby mode when receiving a WUP or LWU event. See Table 1 for the various modes and what parts of the device are active during the each mode.
The TCAN4550 state diagram figure, see Figure 23, shows the biasing of the CAN bus in each of the modes of operation.
Mode | RST Pin | nINT | nWKRQ | INH | GPO2 | Low Power CAN RX | WAKE Pin | WD | SPI | GPIO1 | OSC | CAN TX/ RX | VCCOUT | Memory & Configuration |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Normal | L | On | On | On | On | Off | Off | On | On | On | On | On | On | Saved |
Standby | L | On | On | On | On | On | On | On | On | On | On | Off | On/ | Saved |
TSD Protected | L | On | On | On | On | On | On | On | On | On | On | Off | Off | Saved |
UVIO Protected | L | Off | On | Off | Off | On | On | Off | Off | Off | Off | Mode Dependent | On | Saved |
Sleep | L | Off | On | Off | Off | On | On | Off | Off | Off | Off | Off | Off | Partial Saved |
NOTE