Broadcom BCM20791 Near Field Communications Controller from BCM20793 Circuit Analysis of Analog Blocks 1891 Robertson Road, Suite 500, Ottawa, ON K2H 5B7 Canada Tel: 613.829.0414 Fax: 613.829.0515 www.chipworks.com
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Overview Introduction Brief Design Overview Component Descriptions Device Summary Figures To view, please click on the appropriate bookmark in the panel on the left. 0.1.1 BCM20793 Package Markings 0.1.2 BCM20793 Package X-Ray 0.1.3 BCM20793 Pin Configuration 0.1.4 BCM20791 Die Markings 0.2.1 BCM20791 Die Photograph Top Metal Layer 0.2.2 BCM20791 Die Photograph Pinout 0.2.3 BCM20791 Die Photograph Polysilicon Layer 0.2.4 BCM20791 Die Architecture Schematics 1.0.0 Top Level Diagram 2.0.0 NFC Receiver 2.1.0 V2G2_INV_3_2 2.2.0 V2G2_BUF_4_3D22 2.2.1 V2G2_INV_4_2D8 2.2.2 V2G2_INV_4_3D22 2.3.0 NFC Data Recovery Circuit 2.3.1 V2G2_BUF_4_3D3 2.3.2 V2G2_INV_4_3 2.3.3 V2G2_INV_4_3D3 2.3.4 V2G2_INV_5_4D4 2.3.5 V2G2_BUF_5_4D18 2.3.6 V2G2_INV_5_4D6 2.3.7 V2G2_INV_5_4D18 2.3.8 V2G2_BUF_5_4D1 2.3.9 V2G2_INV_4_4D4 2.3.10 V2G2_INV_5_4D1 2.3.11 M_RS_5_3P5D16 2.3.12 M_INV_5_3P5D16 2.3.13 M_INV_5_3P5D4
2.3.14 Amplifier 2 2.3.15 V2G2_INV_5_4D7 2.3.16 Amplifier 2 2.3.17 Variable Capacitor 2 2.3.18 V2G2_INV_4_3D4 2.3.19 Variable Resistors 1 2.3.20 M_RS_5_3P5D8 2.3.21 M_INV_5_3P5D8 2.3.22 V2G2_INV_5_4D5 2.3.23 Variable Capacitor 1 2.3.24 Programmable Resistors 1 2.3.25 V2G2_INV_4_4D2 2.3.26 V2G2_OR2_3_3 2.3.27 V2G2_NOR2_2_2 2.3.28 V2G2_INV_3_3 2.3.29 Programmable Resistors 2 2.3.30 Comparator 2.3.31 V2G2_INV_5_3D3 2.3.32 V2G2_BUF_5_4D2 2.3.33 V2G2_INV_5_4D2 2.3.34 M_INV_11_4 2.3.35 V2G2_DFN_4_4D2 2.3.36 V2G2_TRINOT14_2_3 2.3.37 V2G2_TRINOT14_2_2 2.3.38 V2G2_TRIGATE_3_3 2.3.39 Amplifier 1 2.3.40 V5G2_AND2_6_4_L2 2.3.41 V5G2_NAND2_6_4_L2 2.3.42 M_TRIGATE_90X40_90X10_L2 2.3.43 Control 2.3.44 V5G2_OR2_5_4_L2 2.3.45 V5G2_NOR2_8_4_L2 2.3.46 V5G2_INV_5_4_L2 2.3.47 Decoder 2.3.48 V5G2_INV_11_8_L2 2.3.49 V5G2_AND3_6_4_L2 2.3.50 V5G2_NAND3_6_4_L2 2.3.51 V5G2_MX21_6_4_L2 2.3.52 V5G2_TRINOT14_11_5_L2 2.3.53 M_PGRES_3S1
2.3.54 V5G2_TRIGATE_45_11D8_L2 2.3.55 V5G2_TRIGATE_45_11D4_L2 2.3.56 V5G2_INV_6_4_L2 2.4.0 Programmable Current Sink 2.4.1 V5G5_TRIGATE_90_90D2_L2 2.5.0 Demodulator 2.5.1 V5G5_INV_6_4_L2 2.5.2 V5G5_TRIGATE_90_90_L3 2.5.3 Amp 2 2.5.4 Amp 1 2.5.5 Variable Capacitors 1 2.5.6 V5G5_TRIGATE_23X6_23X3_L2 2.5.7 V5G5_TRIGATE_23X12_23X6_L2 2.5.8 V5G5_TRIGATE_23X24_23X12_L2 2.5.9 V5G5_TRIGATE_23X3_23X2_L2 2.5.10 Variable Resistors 1 2.5.11 V5G5_TRIGATE_45_45D8_L3 2.5.12 M_CMFB_AMPS1 2.5.13 M_AMP_11 2.5.14 Decoder 2.5.15 V5G5_AND4_6_4_L2 2.5.16 V5G5_NAND4_E9_4_L2 2.5.17 V5G5_INV_11_8_L2 2.5.18 Variable Resistors 6 2.5.19 Variable Resistors 4 2.5.20 Variable Resistors 3 2.5.21 Variable Resistors 2 2.5.22 Mixer 2.5.23 Variable Resistors 4 2.5.24 Variable Resistors 7 2.6.0 DUMMY_BUF_4_3D11 2.6.1 DUMMY_INV_4_3D4 2.6.2 DUMMY_INV_4_3D11 2.7.0 BUFLSF_3P5X2_5 2.7.1 VSGS_INV_8L5_4L6P5 2.7.2 VSGS_INV_4L5X2_4P5L7 2.7.3 VSGS_INV_3P5X2_5 2.7.4 VSGS_INV_3P5_3P5 2.8.0 Decoder 2.8.1 V5G8_INV_6_4_L2
2.8.2 V5G8_AND4_6_4_L2 2.8.3 V5G8_NAND4_E9_4_L2 2.8.4 V5G8_AND2_6_4_L2 2.8.5 V5G8_NAND2_6_4_L2 2.8.6 V5G8_OR2_5_4_L2 2.8.7 V5G8_NOR2_8_4_L2 2.8.8 V5G8_INV_5_4_L2 2.9.0 Programmable Driver 1 2.9.1 Latch 2.9.2 S_INV_22X4_22X2_L3 2.9.3 S_INVF_36L9X2_36L5 2.9.4 S_INV_36L3P5X2_36L5 2.9.5 S_INV_36L36_9L9 2.10.0 Programmable Driver 2 2.10.1 LATCH_2 2.10.2 S_INV_22X4_22X2_L3S1 2.10.3 S_INVF_36L3P5X2_36L5 2.10.4 S_INVF_36L9X2_36L5S1 2.10.5 S_INV_36L36_9L9S1 2.11.0 SWITCH_2 2.12.0 Buffers 2.12.1 V5G1_INV_6L5_4L6P5 2.12.2 BUFLSF_21L4_9L5D3 2.12.3 VSGS_INV_5L5_5L6P5 2.12.4 VSGS_INV_3P5X4_8 2.12.5 VSGS_INV_21L4_9L5D3 2.12.6 V5G1_INV_11L5_8L6P5D2 2.13.0 SWITCH_23L4X8_23L6X4 2.13.1 S_TRIGATE_23L4X8_23L6X4 2.14.0 Control Circuit 2 2.14.1 V5G5_OR2_5_4_L2 2.14.2 V5G5_NOR2_8_4_L2 2.14.3 V5G5_INV_5_4_L2 2.14.4 V5G5_AND3_6_4_L2 2.14.5 V5G5_NAND3_6_4_L2 2.14.6 V5G5_AND2_6_4_L2 2.14.7 V5G5_NAND2_6_4_L2 2.14.8 V5G5_OR3_5_4_L2 2.14.9 V5G5_NOR3_8_4_L2 2.15.0 Signal Detector
2.15.1 V5G5_TRIGATE_90L4_45L6D2 2.15.2 Amplifier 1 2.15.3 Amplifier 3 2.15.4 Amplifier 2 2.15.5 Resistor String DAC 2.15.6 V5G5_MXA21_9_9_L3 2.15.7 V5G5_TRIGATE_9_9_L3 2.15.8 Current Bias 2.15.9 Comparator 2.15.10 S_INV_9_9_L3S3 2.15.11 SMINV_18L9_9L9 2.15.12 Variable Caps 1 2.15.13 Variable Caps 2 2.15.14 S_TRIGATE_4P5X6_4P5X3_L2 2.15.15 S_TRIGATE_4P5X12_4P5X6_L2 2.15.16 S_TRIGATE_4P5X3_4P5X2_L2 2.15.17 Switch 1 2.16.0 Control Circuit 1 2.16.1 Decoder 2 Bit 2.16.2 V5G5_NOR3_11_4_L2 2.16.3 V5G5_NAND4_5_E7_L2 2.17.0 Current Bias 2.18.0 Programmable Current Source 2.19.0 Pull-Up 2.19.1 VOLGEN_1 2.19.2 V2GS_INV_17L1_17L1D25 2.20.0 Clock Divider 2.20.1 V2G2_NAND2_3_E3 2.20.2 V2G2_DFC_4_4D4 2.20.3 V2G2_TRIGATE_3_4 2.20.4 V2G2_NAND2_3_3 2.20.5 V2G2_NAND2_E4_E4 2.20.6 V2G2_TRIGATE_4_3 2.20.7 V2G2_DFC_4_3 2.20.8 V2G2_NAND2_2_2 2.20.9 V2G2_NAND2_3_2 2.20.10 V2G2_TRIGATE_2_2 2.20.11 V2G2_NAND3_3_3 2.21.0 Unused 2.21.1 DUMMY_INV_11_8_L2
2.21.2 DUMMY_DFC_9_6_L2 2.21.3 DUMMY_TRIGATE_4_4_L2 2.21.4 DUMMY_NAND2_4_4_L2 2.21.5 DUMMY_INV_9_6_L2 2.21.6 DUMMY_NAND2_E5_4_L2 2.21.7 DUMMY_TRINOT14_4_4_L2 2.21.8 DUMMY_INV_6_4_L2 2.21.9 DUMMY_NAND3_6_E6_L2 3.0.0 Antenna Driver 3.1.0 Driving Amplifier 2 3.2.0 Voltage Generator 3.2.1 Comparator 3.3.0 Waveform Shaper 3.3.1 Amplifier 2 3.3.2 Amplifier 1 3.3.3 S_INV_22_11_L3 3.3.4 Variable Capacitors 3.3.5 S_TRIGATE_18L2P5X3_18L2P5X2 3.3.6 S_TRIGATE_18L2P5X6_18L2P5X3 3.3.7 S_TRIGATE_18L2P5X12_18L2P5X6 3.3.8 S_TRIGATE_18L2P5X24_18L2P5X12 3.4.0 Programmable Current Bias 3.4.1 Programmable Current Bias 3.4.2 SWITCH_1 3.4.3 Programmable Current Bias 2 3.4.4 Current Voltage Bias 3.4.5 Decoder 3.4.6 Decoder 3.5.0 Driving Amplifier 1 3.5.1 Programmable N Bias 3.5.2 Programmable P Bias 3.6.0 D/A Converter 3.6.1 S_INV_9_6_L3 3.6.2 FLIP_FLOP 3.6.3 FF 3.6.4 AMP_24 3.6.5 Amp Cell 3.6.6 VBIAS_9 3.6.7 S_TRIGATE_45_18X2_L3
3.6.8 S_INV_9_9_L3S2 3.7.0 V Bias Generator 3.8.0 Variable Resistors 3.8.1 Variable Resistor 3.8.2 Variable Resistor 4.0.0 TXRX Controller 4.1.0 Level Shifters 4.2.0 Current Bias 4.2.1 Bandgap Generator 4.2.2 Bandgap Amplifier 4.2.3 Differential Amplifier 1 4.2.4 Current Selector 4.2.5 Decoder 4.2.6 Switches 4.3.0 Control Circuit 5.0.0 NFC Energy Harvesting Circuit 5.1.0 NFC Energy Harvesting Cell 5.1.1 S_INV_13_6_L3 5.2.0 Regulator Controller 6.0.0 NFC Energy Antenna Signal Detector 6.1.0 Control Buffers 2 6.2.0 Decoder 6.3.0 NFC Energy Harvesting Circuit and Controls 6.3.1 S_TRIGATE_36L2P5X2_36L2P5 6.3.2 Control Circuit 1 6.3.3 Comparator 6.3.4 Voltage Dividers 6.3.5 Voltage Bias and Reference 6.3.6 S_INV_3P5_3P5_L3 6.3.7 Voltage Test Switch 6.3.8 S_TRIGATE_36L4P5_18L6D2 6.3.9 Unused 6.3.10 Control Circuit 6.3.11 Counter 6.3.12 SWITCH_90L4P5_45L6D2 6.3.13 S_TRIGATE_90L4P5_45L6D2 6.3.14 Latch
6.3.15 Control Circuit 2 6.3.16 Voltage Bias and Reference 6.3.17 Bandgap Generator 6.3.18 Bandgap Amplifier 6.3.19 Programmable Caps 1 6.3.20 Current Bias 6.3.21 Differential Amplifier 6.3.22 Control RS 6.3.23 NFC Harvesting Energy Circuit 6.3.24 Amplifier 1 6.3.25 S_TRIGATE_270L2P5_270L2P5 6.3.26 S_TRIGATE_3P5L4P5_3P5L5 6.3.27 Programmable Capacitors 6.3.28 S_TRIGATE_36L4_36L5D2 6.3.29 Voltage Reference Generator 6.3.30 S_TRIGATE_45L2P5_45L2P5 6.3.31 Shunt Transistors 6.3.32 Control Circuit 1 6.3.33 Voltage Divider 6.3.34 Switched Capacitors 6.3.35 S_TRIGATE_36L4_36L5 6.3.36 Unused 6.3.37 Test Switches 6.3.38 SWITCH_90L4_45L6D2 6.3.39 S_TRIGATE_90L4_45L6D2 6.3.40 SWITCH_36L4_18L6D2 6.3.41 S_TRIGATE_36L4_18L6D2 6.4.0 Control Buffers 3 6.5.0 Control Buffers 4 6.6.0 NFC Antenna Signal Detector 6.6.1 Comparator 1 6.6.2 Voltage Detectors 6.6.3 Comparator 2 6.6.4 S_INV_3P5X2_3P5L3 6.6.5 S_INV_3P5_3P5L3 6.6.6 ADJCAPRES_1 6.6.7 DEC_3B_1 6.6.8 ADJCAPRES_1S1 6.6.9 Control 6.6.10 SWITCH_36L4_18L6D2S1
6.6.11 SWITCH_18L6_18L6D2 6.6.12 Control A 6.6.13 Variable Capacitors 6.6.14 S_TRIGATE_3P5_3P5L3 6.6.15 Decoder 6.6.16 Variable Capacitors 6.6.17 Divider 6.6.18 Antenna Signal Detector 6.6.19 Amplifier 2 6.6.20 Amplifier 1 6.6.21 S_INV_18L9_9L9 6.6.22 Oscillator 6.6.23 Comparator 6.6.24 Programmable Capacitors 6.6.25 Clock Generator 6.6.26 Voltage Detector 6.6.27 SWITCH_90L4_45L6D2S1 6.7.0 Control Buffers 1 6.8.0 Control Circuit 2 6.9.0 Voltage Controlled Oscillator 6.9.1 Clock Path 6.9.2 S_DTC_6_4_L2 6.9.3 VCO 6.9.4 SWITCH_18L6_18L6D2_1 6.9.5 Voltage Generator 6.9.6 Programmable Capacitors 6.9.7 Decoder 6.9.8 S_DTN_6_4_L2 6.10.0 Control 1 7.0.0 Frequency Synthesizer 7.1.0 Clock Input Path 7.1.1 Clock Pad ESD 7.1.2 Clock Pad ESD 7.1.3 Clock Pad Bias Current 7.1.4 Clock Boosting Circuit 7.1.4.1 Local Bias Generator 7.1.4.2 Boost Control 7.1.4.2.1 Delay Buffer x12 7.1.5 Clock Multiplexor
7.1.5.1 Level Shifter 7.1.6 Clock Buffering 7.1.6.1 Adjustable Strength Clock Driver 7.1.6.2 Adjustable Strength Clock Driver 7.1.6.3 Adjustable Strength Clock Driver 7.1.7 Selectable Delay Clock Buffer 7.1.7.1 Delay Buffer x3 7.1.8 Control Logic 7.2.0 Phase Locked Loop 7.2.1 Phase Frequency Detector 7.2.1.1 Delay Buffer x6 7.2.2 Charge Pump 7.2.2.1 Voltage Amplifier 7.2.2.2 Current Driver 7.2.2.3 Current Driver 7.2.2.4 Current Driver 7.2.2.5 Local Bias Generator 7.2.3 Voltage Controlled Oscillator 7.2.3.1 VCO Bandgap Voltage Reference 7.2.3.1.1 Differential Amplifier 7.2.3.1.1.1 Differential Amplifier Bias 7.2.3.2 VCO Programmable Resistance 7.2.3.3 VCO Bias Current Generator 7.2.3.4 VCO Bias Current Generator 7.2.3.5 Adjustable Capacitance 7.2.3.6 Signal Buffers 7.2.4 Clock Divide and Latch 7.2.4.1 Clock Divide and Select 7.2.4.2 Clock Logic Control 7.2.4.3 Clock Logic 7.2.4.3.1 Latches 7.2.5 Local Reference Voltage 7.2.6 Voltage Comparator 7.2.6.1 Local Voltage References 7.2.7 Clock Input Buffer and Divider 7.3.0 Clock Selection Buffer 7.4.0 Internal Clock Generator 7.4.1 Clock Generator Amplifier 7.4.1.1 Local Bandgap Reference 7.4.1.1.1 Differential Amplifier
7.4.2 Schmitt Trigger 7.5.0 Clock Divider with Select Output 7.6.0 Clock Divider 7.7.0 Bandgap Reference Comparison 7.7.1 Bandgap Reference Amplifier 7.7.2 Differential Comparator 7.8.0 Counter and Logic 7.8.1 6 Bit Counter 7.9.0 P25 Input Path 7.9.1 P25 ESD 7.9.2 Schmitt Trigger 7.9.3 Schmitt Trigger 7.10.0 Pulse Generator 7.10.1 Digital Logic Cell 7.10.2 2-to-1 Multiplexer 7.10.3 Digital Logic Cell 7.11.0 Pad ESD 7.12.0 Pad ESD 7.13.0 Decoupling Capacitors 8.0.0 Internal Supply Generators 8.1.0 Bandgap Voltage Generator 8.1.1 Bandgap Amplifier 8.1.1.1 Analog Inverter 8.1.2 Programmable Voltage Reference Generator 8.1.2.1 Reference Generator Amplfier 8.1.2.2 3-to-8 Decoder 8.1.3 Reference Voltage Generator 8.1.4 Voltage Comparator 8.2.0 VINT3 Internal Supply Generator 8.2.1 Voltage Amplifier 8.2.2 3-to-8 Decoder 8.3.0 Bandgap Bias Current Generator 8.3.1 Bandgap Voltage Amplfier 8.3.2 Bandgap Voltage Amplifier 8.3.3 3 Bit Resistor String DAC 8.3.3.1 3-to-8 Decoder 8.3.4 3 Bit Resistor String DAC 8.3.5 Parallel Current Drivers (x48) 8.3.6 Parallel Current Drivers (x12)
8.3.7 Parallel Current Drivers (x24) 8.3.8 Parallel Current Drivers (x20) 8.4.0 Resistor String Voltage Generator 8.5.0 VDD5 Internal Voltage Generator 8.5.1 Voltage Amplifier 8.5.2 Voltage Amplifier 8.5.3 Bias Voltage Generator 8.5.4 Bias Voltage Generator 8.5.5 Bias Generator 8.5.5.1 Parallel Current Driver (x8) 8.5.5.2 Parallel Current Driver (x16) 8.5.5.3 Parallel Current Driver (x10) 8.5.5.4 Parallel Current Driver (x14) 8.5.6 Bias Generator 8.5.7 Reference Voltage Generator 8.5.8 Bias Voltage Generator 8.5.9 Parallel Current Driver (x24) 8.5.10 Parallel Current Driver (x16) 8.5.11 Voltage Reference Generator 8.5.11.1 Level Shifting Buffer 8.5.12 Voltage Reference Generator 8.5.13 Control Logic 8.6.0 Voltage Generator 8.6.1 Voltage Amplifier 8.6.2 4 Bit Resistor String DAC 8.6.2.1 4-to-16 Decoder 8.6.3 Bias Voltage Generator 8.6.4 Bias Generator 8.6.5 Bias Voltage Generator 8.7.0 Switch Driver 8.8.0 VINT2 Voltage Generator 8.9.0 Resistor String Voltage Reference 8.10.0 Adjustable Voltage Reference 8.11.0 Voltage Generator Timing Control 8.12.0 Control Logic 8.12.1 Analog Buffer 8.13.0 Control Signal Buffers 8.13.1 Signal Buffer and Latch
9.0.0 Voltage Generators (Lower Left Corner) 9.1.0 Internal Voltage Regulator 9.2.0 Internal Voltage Regulator 9.3.0 Test Switch 9.4.0 2-to-4 Decoder 9.5.0 Resistor String Voltage Generator 9.5.1 8-to-1 Voltage Multiplexor 9.5.2 3-to-8 Decoder 9.6.0 Voltage Comparators 9.6.1 Voltage Comparator 9.6.2 Voltage Comparator 9.6.3 Voltage Comparator 9.6.4 Voltage Comparator 9.7.0 Local Bias Current Generator 9.7.1 Voltage Comparator 9.7.2 Data Latch 9.7.2.1 Schmitt Trigger 9.7.3 Voltage Level Detector 9.8.0 VINT1 Voltage Generator 9.9.0 Signal Buffers 9.9.1 Input Latch 10.0.0 Local VINT Control 11.0.0 Voltage Level Monitors 11.1.0 Power-On Detector 11.2.0 Voltage Reference Generator 11.2.1 Voltage Amplifier 11.2.2 R-C Delay 11.2.2.1 R-C Control 11.2.2.2 3-to-8 Decoder 11.2.3 Voltage Reference 1 11.2.4 Regulator Output 11.2.5 Voltage Reference 2 11.2.6 Voltage Reference 3 11.2.7 Cascoded Transistors x15 11.2.8 Bias Generator 11.2.9 Shutdown Control 11.3.0 Supply Selector Switch 11.3.1 Clock Enabled Switch
11.3.2 Clock Generator 11.4.0 Reference Generator 11.4.1 Bias Generator 11.4.2 Voltage Reference Generator 11.4.2.1 Amplifier 11.4.3 Voltage Reference Generator Monitor 11.4.3.1 Comparator 11.4.4 Supply Voltage Monitor 11.4.5 Shutdown Control 11.5.0 Capacitor Delay Triggered Control Logic 11.5.1 Variable Bias Generator 11.5.2 Variable Bias Control 11.5.3 Comparator 11.5.4 Comparator 11.6.0 Capacitor Delay Triggered Control Logic 11.6.1 Variable Bias Generator 11.6.2 Variable Bias Control 11.6.3 Comparator 11.6.4 Comparator 11.7.0 Buffers 11.8.0 Buffers 11.9.0 Buffers 12.0.0 Test Circuits 12.1.0 Test Signal Switch 12.2.0 2-to-4 Decoder 12.3.0 Test Signal Switch 12.4.0 Test Signal Switch 13.0.0 Output Drivers and Data Buffers 13.1.0 Output Driver 13.2.0 Output Driver Control 13.3.0 Output Buffer 13.3.1 Transimpedance Amplifier 13.3.2 Supply Independent Regulator 13.4.0 Output Buffer Logic 13.5.0 Output Driver 13.6.0 Signal Buffers 13.7.0 Data Buffers
14.0.0 Power Supply Pads and ESD 14.1.0 Pad ESD 14.2.0 Pad ESD 14.3.0 Pad ESD 14.4.0 Pad ESD 14.5.0 Pad ESD 14.6.0 Pad ESD 14.7.0 Pad ESD 14.8.0 Pad ESD 14.9.0 Pad ESD Cell Library 15.0.0 TXRX Pads About Chipworks
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