Chapter 18 Gate Drive Unit (GDU2PHV2)MC9S12ZVMB Family Reference Manual Rev. 1.3NXP Semiconductors 58318.3.2.2 GDU Control Register (GDUCTR )NOTEThe register bits GBKTIM1 and GBKTIM2 must be set to the requiredvalues before the PWM channel is activated. Once the PWM channel isactivated, the value of GBKTIM1 & GBKTIM2 must not change. If adifferent blanking time is required, the PWM channel has to be turned offbefore new values to GBKTIM1 & GBKTIM2 are written.Module Base + 0x0001 Access: User read/write (1)1. Read: AnytimeWrite: Only if GWP=07 6 5 4 3 2 1 0R GHHDLVL GVLSLVL GBKTIM2[3:0] GBKTIM1[1:0]WReset 0 1 0 1 0 0 0 0= UnimplementedFigure 18-4. GDU2PH Control Register (GDUCTR)Table 18-3. GDUCTR Register Field DescriptionsField Description7GHHDLVLGDU High GHD Level Select — Selects the voltage threshold of the overvoltage detection on GHD pin.This bit cannot be modified after GWP bit is set.0 Voltage thresholds of the overvoltage detection on GHD pin configured for V HVHDLA and VHVHDLD1 Voltage thresholds of the overvoltage detection on GHD pin configured for V HVHDHA and VHVHDHD6GVLSLVL(Not featuredon GDUV4)GDU VLS Level Select — Selects the voltage threshold of the undervoltage detection on VLS pin.This bit cannot be modified after GWP bit is set.0 Voltage thresholds of the undervoltage detection on VLS pin configured for V LVLSLA and VLVLSLD1 Voltage thresholds of the undervoltage detection on VLS pin configured for V LVLSHA and V LVLSHD5-2GBKTIM2[3:0]GDU Blanking Time — These bits adjust the blanking time t BLANK of the desaturation error comparators. Theresulting blanking time tBLANK can be calculated from the equation below. For GBKTIM2[3:0]=$F nodesaturation errors are captured and the drivers are unprotected and the charge pump will not connect to thehigh-side drivers. These bits cannot be modified after GWP bit is set.1-0GBKTIM1[1:0]GDU Blanking Time — These bits adjust the blanking time t BLANK of the desaturation error comparators. Theresulting blanking time tBLANK can be calculated from the equation in the field description below.These bitscannot be modified after GWP bit is set.tBLANK GBKTIM2 1+ · 2 GBKTIM1 1+ 2+ TBUS=
