STA8088FG Pin description
Doc ID 022731 Rev 3 9/17
2.4 Main function pins
VDD12_LPVR Pwr
Digital supply voltage for backup logic (1.2 V). When using the LPVR,
this pin shall not be driven by an external voltage supply, but a
capacitance shall be connected between these pins and GND to
guarantee on-chip voltage stability.
21
VDD_IOR1 Pwr Digital supply voltage for I/O ring 1 (1.8 or 3.3 V) 44
VDD_IOR3 Pwr Digital supply voltage for I/O ring 3 (1.8 V) 45
VDD_IOR4 Pwr Digital supply voltage for I/O ring 4 (1.8 V) 34
VDD_IOR5 Pwr Digital supply voltage for I/O ring 5 (3.3 V) 52
VRF18_RFVR Pwr Analog supply voltage for RF voltage regulator (1.8 V) 13
VRF12OUT_RFVR Pwr RF voltage regulator 1.2 V output 12
VRF12_LNA Pwr Analog supply voltage for LNA (1.2 V) 8
VRF12_RFA Pwr Analog supply voltage for RFA (1.2 V) 14
VRF12_MIX Pwr Analog supply voltage for Mixer (1.2 V) 16
VRF12_IF Pwr Analog supply voltage for IF (1.2 V) 17
VRF12_RFVCO Pwr Analog supply voltage for VCO (1.2 V) 18
VRF12_RFADC Pwr Analog supply voltage for RF ADC (1.2 V) 7
GND_LNA GND Analog supply ground for LNA 10
GND GND Analog and digital supply ground EP
Table 1. Power supply pins (continued)
Symbol I/O Functions VFQFN56
Table 2. Main function pins
Symbol I/O voltage I/O Functions VFQFPN56
STDBYn 1.2V I
When low, the chip is forced in Standby Mode - All
pins in high impedance except the ones powered
by Backup supply
24
STDBYOUT 1.2V O When low, indicates the chip is in Standby Mode. 23
RSTn 1.2V I
Reset Input with Schmitt-Trigger characteristics
and noise filter.
25
WAKEUP 1.2V I WAKEUP from STANDBY mode 26
RTC_XTI 1.5V (Max) I
Input of the 32 KHz oscillator amplifier circuit and
input of the internal real time clock circuit.
27
RTC_XTO 1.5V (Max) O Output of the oscillator amplifier circuit. 28
ADC_IN[1,5]
1.4V – 0
Typ Range
I ADC Analog input [1,5] 32,33
USB_DP/UART1_TX VDD_IOR5 USB/O USB D+ signal / UART 1 Tx data 48
USB_DM/UART1_RX VDD_IOR5 USB/I USB D- signal / UART 1 Rx data 49
