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10 / 20 page System block diagram STA2058 10/20 3.3 Power supply pins Note: V33 and V33IO-PLL are all internally connected. Same for VSS and VSSIO-PLL. All VSS, VSS18, VSSBKP, AVSS pins must be tied together to the common ground plane, taking care of noise filtering, especially on AVSS Table 3. Power supply pins Symbol I/O Function LQFP 64 LFBGA144 V33 - Digital supply voltage for I/O circuitry (3.3 Volt) 9, 51 D2,A3,K3,F6,B9 , E9,B10 VSS - Digital ground for I/O circuitry 4, 8, 44, 50, 59 D1,A2,F4,L4,M 4, F5, D7,E10 V33IO-PLL - Digital supply voltage for I/O circuitry and for PLL reference (3.3V) 38 H12 VSSIO-PLL - Digital ground for I/O circuitry and for PLL reference 39 H11 V33REG_B KP - Digital supply voltage for backup block I/O circuitry and for ballast I/O (3.3V) 17 M2 VSSREG - Digital ground for ballast I/O 18 L3 V18 - Digital supply voltage for core circuitry (1.8 Volt): when using the internal voltage regulator, this pin shall not be driven by an external voltage supply, but a capacitance of at least 10 μF (tantalum, low series resistance) + 33nF (ceramic) shall be connected between these pins and VSS18 to guarantee on-chip voltage stability. 27, 58 G6, H6,E7 VSS18 - Digital Ground for core circuitry 28, 57 A9,L7 V18BKP - Digital supply voltage for backup block (RTC, oscillator, Wake-up controller - 1.8 Volt): when using the internal voltage regulator, this pin shall not be driven by an external voltage supply, but a capacitance of at least 1 μF shall be connected between this pin and VSSBKP to guarantee on-chip voltage stability. 26 J6,K6 VSSBKP - Digital Ground for backup logic 25 L6 AVDD - Analog supply voltage for the A/D converter 29 M9, M11 AVSS - Analog supply Ground for the A/D converter 30 J8,K8 |
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