Datasheet

NXP Semiconductors

FRDM33772BSPIEVB

Featuring the MC33772B battery cell controller IC

User guide Rev. 1.0 — 22 June 2018

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Figure 3. VCOM LED

The VCOM LED indicates when the device is in normal mode. Upon reset, the

MC33772B enters into normal mode (VCOM turns on). If there is no activity on the bus

after a timeout period of 60 seconds, the device enters low-power idle mode (VCOM

turns off). Once the device is initialized, if no communication occurs on the bus after one

second, the device resets and the LED turns off (VCOM off). Depending on the device

settings, the VCOM LED may flash 0.1...8 seconds during cyclic acquisition.

4.7 Test-point definitions

Figure 4 shows the location of the test points on the board.

Figure 4. Test points

The following test points provide access to various signals to and from the board.

Table 3. Test points

Test-point name Signal name Description

FAULT FAULT Measures the fault detection sent by the device

NEG_BAT GNDREF Ground reference of the device