MAX20330AEWA+

MAX20330A General Description The MAX20330A is an ID detection IC that detects the ID resistor values when it is enabled. The device automatically adjusts the detection current to check the wide range of the ID resistor values while keeping the average supply current low. The MAX20330A supports the factory mode for direct system or battery current measurement. The device protects the internal supply from the overvoltage on ID pin up to 40V. The device is available in an 8-bump (0.35mm pitch, 1.77mm x 1.03mm) wafer-level package (WLP) and operates over the -40°C to +85°C extended temperature range. Applications ●● Smart Phones ●● Tablet PCs ●● E-Readers Precision HV Capable ID Detector Benefits and Features ●● Protects Battery Connected Modules with Minimum Power Consumption • Ultra-Low Shutdown Current: 2.8µA (Typ) • Ultra-Low ID Detection Current: 2µA (Typ) ●● Flexible ID Detection and Support • Automatic and Manual ID Value Detection • Factory Mode Detection • Automatic Device Detection and Interrupt ●● ID Overvoltage Protection • Blocking High-Voltage Input ●● Provides Premium Security in System Reliability • High Input Voltage Tolerant • Thermal Shutdown Protection ●● Space Saving • 8-Bump, 0.35mm Pitch, 1.77mm x 1.03mm WLP Ordering Information appears at end of data sheet. 19-100293; Rev 1; 6/18 MAX20330A Precision HV Capable ID Detector Absolute Maximum Ratings (All voltages referenced to GND.) ID, EN, PCON to GND...........................................-0.3V to +40V SDA, SCL, INT, VCC to GND...................................-0.3V to +6V Continuous Current into all pins..........................................±0.1A Continuous Power Dissipation (TA = +70°C) WLP (derate 10.9mW/°C above +70°C).......................872mW Operating Temperature Range............................ -40°C to +85°C Junction Temperature.......................................................+150°C Storage Temperature Range............................. -65°C to +150°C Soldering Temperature (reflow)........................................+260°C Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Package Thermal Characteristics (Note 1) WLP Junction-to-Ambient Thermal Resistance (θJA)......91.72°C/W Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial. Electrical Characteristics (VCC = 2.6V to 5.5V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VCC = 3.3V, TA = +25°C) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS 2.6 VCC VCC Voltage Range VCC Supply Current VCC Shutdown Current VCC ICC ICC_SHDN 3.3 5.5 V VCC = 4.2V, ISRC = 0mA , manual detection mode, ENb = 0 130 200 µA VCC = 4.2V, ENb = 1 2.8 5 µA +5 % 2 V ID Current Source Current Source Accuracy -5 Current Source Open Voltage ISRC = 2µA 2 6 Current Source 18 IID µA 54 162 2.5 Average Current Source IID_AVG 162µA max current , IS_PERIOD ≥ 130x, ISRC_MAN = 0 mA 2 µA PCON Open-Drain Voltage Output Low Voltage Leakage Current www.maximintegrated.com VOL ILEAK ISINK = 10mA Open-drain, PCON < ID + 7V 0.1 36 V 0.2 V 1 µA Maxim Integrated │  2 MAX20330A Precision HV Capable ID Detector Electrical Characteristics (continued) (VCC = 2.6V to 5.5V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VCC = 3.3V, TA = +25°C) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS ADC Resolution Voltage Step Full-Scale Error 8 Bit 5.9 mV -2 +2 % Noise Filtering 100 µs Full Scale 1.5 V DIGITAL SIGNALS (SDA, SCL, INT) Output Low Voltage VOL Leakage Current VIO = 3.3V, ISINK = 3mA VIO = 2.6V, open-drain Input Logic-High VIH Input Logic-Low VIL Input Leakage Current 0.4 V 1 µA 1.4 VIN = 0V, VIN = 2.6V V -1 0.4 V +1 µA DIGITAL SIGNAL (EN) EN Logic-Low With respect to VCC 55 EN Hysteresis Input Leakage Current %VCC 20 IIN VIN = 0V, VIN = 2.6V %VCC -1 +1 µA TIMING CHARACTERISTICS (Note 3) ID Current Source On Time ID Current Source Off Period Time tIS_TDET tIS_PERIOD ID off to ID turn on EN Debounce Time Programmable Time Accuracy I2C Maximum Clock Frequency Programmable ms Programmable ms 100 ms -10 +10 % 400 kHz Thermal Shutdown 125 °C Thermal Shutdown Hysteresis 20 °C THERMAL PROTECTION Note 2: All devices are 100% production tested at TA = +25°C. Specifications over the operating temperature range are guaranteed by design. Note 3: All timing characteristics are measured using 20% and 80% level unless otherwise specified. www.maximintegrated.com Maxim Integrated │  3 MAX20330A Precision HV Capable ID Detector Typical Operating Characteristics (VCC = 4.2V, TA = +25°C, unless otherwise noted.) VCC SUPPLY CURRENT vs. SUPPLY VOLTAGE VCC AVERAGE SUPPLY CURRENT vs. TEMPERATURE toc01 180 150 120 TA = +85ºC 100 80 TA = +25ºC 60 40 TA = -40ºC 20 0 140 135 130 125 120 115 110 105 EN_IS = 0 I2C 100 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 -40 -15 ID = 30Ω DEFAULT SETTING 10 35 60 SUPPLY VOLTAGE (V) TEMPERATURE (ºC) VCC AVERAGE SUPPLY CURRENT vs. TEMPERATURE VCC SHUTDOWN CURRENT vs. TEMPERATURE 150 toc04 140 135 130 125 120 115 110 ID = 30Ω IS_PERIOD = 00 (4x) 105 100 85 -40 -15 10 35 60 85 TEMPERATURE (ºC) 3.5 145 toc03 145 AVERAGE SUPPLY CURRENT (µA) AVERAGE SUPPLY CURRENT (µA) 140 SUPPLY CURRENT (µA) 150 145 160 ID DETECTION WAVEFORM OF FACTORY MODE toc05 toc06 3.0 140 VCC SHUTDOWN CURRENT (µA) AVERAGE SUPPLY CURRENT (µA) VCC AVERAGE SUPPLY CURRENT vs. TEMPERATURE toc02 135 130 125 120 115 110 100 -40 -15 10 35 60 1.0 2V/div -40 -15 10 35 60 85 1s/div TEMPERATURE (ºC) ID DETECTION WAVEFORM toc07 10mV/div ID DETECTION WAVEFORM toc08 VID 200mV/div 4ms/div toc09 VID 500mV/div VBUS ID = 700kΩ VBUS ID = 100kΩ VBUS ID = 10Ω www.maximintegrated.com VBAT EN HIGH 0.0 85 VID 4ms/div 2V/div 1.5 TEMPERATURE (ºC) ID DETECTION WAVEFORM VID 2.0 0.5 ID = 700kΩ I2C DEFAULT SETTING 105 2.5 4ms/div Maxim Integrated │  4 MAX20330A Precision HV Capable ID Detector Bump Configuration TOP VIEW (BUMPS ON BOTTOM) 1 2 3 4 GND SDA INT SCL + MAX20330A A PCON EN B ID VCC Bump Description BUMP NAME A1 PCON A2 EN A3 GND Ground A4 SDA I2C Data Line. Connect SDA to an external pullup resistor. B1 ID B2 VCC Supply for the I2C Digital Block. Bypass VCC to ground with a 0.1µF capacitor as close to the device as possible. B3 INT Interrupt Output. B4 SCL I2C Clock Line. Connect SCL to an external pullup resistor. www.maximintegrated.com FUNCTION External P-FET Control. Open-drain, high-voltage to drive an external, back-to-back open-drain in factory mode. Active-Low Enable ID Detection ID of USB Connector. For proper ESD and surge protection, place the external TVS on ID. Maxim Integrated │  5 MAX20330A Precision HV Capable ID Detector Functional Diagram PCON MAX20330A ID OVLO ZCD EN VCC POR BG SCL SDA INT I2C DAC ISOURCE ADC LOGIC CONTROL TIMER GND Table 1. Register Map ADDRESS NAME TYPE DEFAULT DESCRIPTION 0x00 CHIP ID Read Only 0x80 Device ID Register 0x01 CONTROL 1 RW 0x6A System Control 1 0x02 STATUS Read Only 0x00 Status Register 0x03 INTERRUPT Clear on Read 0x00 Interrupt Register 0x04 MASK RW 0xFF Mask Register 0x06 I_SRC RW 0x03 Current Source Threshold 0x07 I_SRC_TMR RW 0x13 Current Source On Timer 0x08 CONTROL 2 RW 0x0C System Control 2 0x09 PCON CTRL RW 0x00 PCON Control 0x0A ACCDET_REF RW 0x6E Accessory Detection Threshold 0x0B ISRC_ADC Read Only 0x00 Current Source Output 0x0D FM_I_SET RW 0x02 Factory Mode 0x0E FM_HI_LIM RW 0xAF Factory Mode High Limit 0x0F FM_LO_LIM RW 0x82 Factory Mode Low Limit www.maximintegrated.com Maxim Integrated │  6 MAX20330A Precision HV Capable ID Detector Table 2. Detailed Register Map CHIP ID 0x00 (Read Only) BIT 7 6 BIT NAME Reset Value Description 5 4 3 CHIP_ID 1 0 2 1 0 0 0 CHIP_REV 0 0 0 0 Chip ID and Revision CONTROL 1 0x01 (Read/Write) BIT BIT NAME Reset Value 7 6 5 4 3 2 1 0 RFU EN_IS CZC RFU RFU RFU FM_ENb ENb 0 1 1 0 1 0 1 0 RFU Reserved for future use EN_IS Current Source (I_SRC) Enable 0 = I_SRC disabled 1 = I_SRC enabled (default) CZC Control of Zero-Crossing Detection 0 = CZC disabled 1 = CZC enabled (default) FM_ENb Factory Mode Active-Low Enable 0 = FM is enabled 1 = FM is disabled (default) ENb Device Active-Low Enable 0 = device is in active mode (default) 1 = device is in sleep mode www.maximintegrated.com Maxim Integrated │  7 MAX20330A Precision HV Capable ID Detector Table 2. Detailed Register Map (continued) STATUS 0x02 (Read Only) BIT BIT NAME Reset Value 7 6 5 4 3 2 1 0 VIN_OK ZCS EOC TP_OUT ACC_DET THERM_ SHDN ID_OVLO OVLO_ ENb 0 0 0 0 0 0 0 0 VIN_OK VIN (ID) is above 2.7V (typ) in factory mode 0 = ID is below 2.7V 1 = ID is above 2.7V ZCS Zero-Crossing Flag (only valid when CZC = 1) 0 = no ZC 1 = ZC in last IS_TDET EOC End of ADC Conversion 0 = no conversion since last read 1 = new ADC data since last read TP_OUT Timer Period Out 0 = timer period not expired 1 = timer period expired ACC_DET Accessory Detection Status 0 = no change 1 = accessory detected THERM_SHDN Thermal Shutdown 0 = no thermal shutdown 1 = thermal shutdown ID_OVLO ID Overvoltage 0 = ID not overvoltage 1 = ID overvoltage (2V typ) OVLO_ENb EN Pin Status 0 = EN pin disabled (high) 1 = EN pin enabled (low) www.maximintegrated.com Maxim Integrated │  8 MAX20330A Precision HV Capable ID Detector Table 2. Detailed Register Map (continued) INTERRUPT 0x03 (Clear on Read) BIT BIT NAME Reset Value 7 6 5 4 3 2 1 0 VIN_OKi ZCSi EOCi TP_OUTi ACC_ DETi THERM_ SHDNi ID_OVLOi OVLO_ ENbi 0 0 0 0 0 0 0 0 VIN_OKi VIN (ID) is above 2.7V interrupt 0 = interrupt not occurred 1 = interrupt occurred ZCSi ZCS Flag interrupt 0 = interrupt not occurred 1 = interrupt occurred EOCi ADC EOC interrupt 0 = interrupt not occurred 1 = interrupt occurred TP_OUTi Timer Period OUT interrupt 0 = interrupt not occurred 1 = interrupt occurred ACC_DETi Accessory Detection interrupt 0 = interrupt not occurred 1 = interrupt occurred THERM_SHDNi Thermal Shutdown interrupt 0 = interrupt not occurred 1 = interrupt occurred ID_OVLOi ID OVLO interrupt 0 = interrupt not occurred 1 = interrupt occurred OVLO_ENbi EN pin interrupt 0 = interrupt not occurred 1 = interrupt occurred www.maximintegrated.com Maxim Integrated │  9 MAX20330A Precision HV Capable ID Detector Table 2. Detailed Register Map (continued) MASK 0x04 (Read/Write) BIT BIT NAME Reset Value 7 6 5 4 3 2 1 0 VIN_OKm ZCSm EOCm TP_ OUTm ACC_ DETm THERM_ SHDNm ID_ OVLOm OVLO_ ENbm 1 1 1 1 1 1 1 1 VIN_OKm VIN (ID) is above 2.7V interrupt 0 = not masked 1 = masked ZCSm ZCS interrupt 0 = not masked 1 = masked EOCm ADC EOC interrupt 0 = not masked 1 = masked TP_OUTm Timer Period OUT interrupt 0 = not masked 1 = masked ACC_DETm Accessory Detection interrupt 0 = not masked 1 = masked THERM_SHDNm Thermal Shutdown interrupt 0 = not masked 1 = masked ID_OVLOm ID OVLO interrupt 0 = not masked 1 = masked OVLO_ENbm EN pin interrupt 0 = not masked 1 = masked www.maximintegrated.com Maxim Integrated │  10 MAX20330A Precision HV Capable ID Detector Table 2. Detailed Register Map (continued) I_SRC 0x06 (Read/Write) BIT BIT NAME Reset Value 7 6 RFU 0 5 4 I_SRC_MON 0 0 3 2 RFU 0 0 1 0 I_SRC_SET 0 1 1 RFU Reserved for future use. I_SRC_MON (Read Only) Current source monitor 000 = off 001 = 2µA 010 = 6µA 011 = 18µA 100 = 54µA 101 = 162µA 110 = 2500µA 111 = reserved I_SRC_SET Current source set In auto mode, it is the maximum current source set. Above this value, the auto ID detection is skipped. In manual mode, it is the fixed current source set. 000 = off 001 = 2µA 010 = 6µA 011 = 18µA (default) 100 = 54µA 101 = 162µA 110 = 2500µA 111 = reserved www.maximintegrated.com Maxim Integrated │  11 MAX20330A Precision HV Capable ID Detector Table 2. Detailed Register Map (continued) I_SRC_TMR 0x07 (Read/Write) BIT 7 BIT NAME 6 RFU Reset Value 0 5 4 IS_PERIOD 0 0 1 3 2 IS_INIT_ SET 0 1 0 IS_TDET 0 1 1 RFU Reserved for future use. IS_PERIOD Repeat period, off period 00 = 4x 01 = 130x (default) 10 = 250x 11 = 1600x IS_INIT_SET Set the initial value different from IS_PERIOD and IS_TDET for the ID detection auto-mode 0 = use IS_PERIOD and IS_TDET for the initial check (2µA) (default) 1 = use IS_PERIOD = 00 and IS_TDET = 101 as the initial value. If the current source needs to increase, then use the programmed IS_PERIOD and IS_TDET value for the current source larger than 2µA. IS_TDET Current source on time for detection 000 = 2500µs 001 = 3500µs 010 = 4000µs 011 = 10000µs (default) 100 = 40000µs 101 = 100000µs 110 = 400000µs 111 = 1sec CONTROL2 0x08 (Read/Write) BIT BIT NAME Reset Value 7 6 5 4 RFU RFU RFU RFU 0 0 0 0 3 2 AUT_ISRC_SCL 1 1 1 0 ISRC_MAN ISRC_ST 0 0 RFU Reserved for future use. AUT_ISRC_SCL Automatic scaling for impedance detection reference 00 = 10% of full ADC scale 01 = 20% of full ADC scale 10 = 30% of full ADC scale 11 = 30% of full ADC scale (default) ISRC_MAN Current source manual detection 0 = automatic scaling for detection when ENb = 0 (default) 1 = manual detection when ENb = 0, fixed based on I_SRC and ISRC_TMR register values (register 0x06 and 0x07) ISRC_ST Current source manual start and ADC conversion. The bit is cleared after one impedance detection. 0 = disable (default) 1 = start one manual impedance detection www.maximintegrated.com Maxim Integrated │  12 MAX20330A Precision HV Capable ID Detector Table 2. Detailed Register Map (continued) PCON CTRL 0x09 (Read/Write) BIT BIT NAME Reset Value 7 6 5 4 3 2 1 0 RFU RFU RFU RFU PCON_ RDY RFU PCON_ EN PCON_ MAN 0 0 0 0 0 0 0 0 RFU Reserved for future use PCON_RDY (Read Only) PCON output is ready to be on as ADC value is within factory mode range. The PCON output will be turned on if the next immediate ADC value is 0xFF with 150µA. 0 = PCON output is disabled 1 = PCON output is ready PCON_EN Open-drain output for the external P-FET control output enable in manual mode 0 = output is disabled (output is hi-Z) (default) 1 = output is enabled (output is active low) PCON_MAN PCON output manual control 0 = PCON output is controlled by the automatic factory mode (default) 1 = PCON output is controlled by the PCON_EN bit ACCDET_REF 0x0A (Read/Write) BIT 7 6 5 BIT NAME 3 2 1 0 1 1 0 ACC_DET_TH Reset Value ACC_DET_TH 4 0 1 1 0 1 Accessory Detection Threshold Accessory is detected (ACC_DET = 1) if ADC_1 (0x0B) final reading is lower than ACC_DET_TH ISRC_ADC 0x0B (Read Only) BIT 7 6 5 4 BIT NAME Reset Value ADC_1 3 2 1 0 0 0 1 0 ADC_1 0 0 0 0 0 0 5 4 3 2 ID ADC reading: 0V to 1.5V Voltage step 5.9mV (typ) FM_I_SET 0x0D (Read/Write) BIT 7 6 BIT NAME Reset Value FIS www.maximintegrated.com RFU 0 0 0 FIS 0 0 0 1 0 The current source set for the factory mode resistor value. 000 = off (no factory mode) 001 = 2µA 010 = 6µA (default) 011 = 18µA 100 = 54µA 101 = 162µA 110 = 2500µA 111 = off (no factory mode) Maxim Integrated │  13 MAX20330A Precision HV Capable ID Detector Table 2. Detailed Register Map (continued) FM_HI_LIM 0x0E (Read/Write) BIT 7 6 5 4 BIT NAME 3 2 1 0 1 1 1 1 3 2 1 0 0 0 1 0 FHL Reset Value 1 0 1 0 The factory mode ADC value high limit value 1010 1111 = 1032.5mV (172kΩ) FHL FM_LO_LIM 0x0F (Read/Write) BIT 7 6 5 4 BIT NAME FLL Reset Value 1 0 0 0 The factory mode ADC value low limit value 1000 0010 = 767mV (127.8kΩ) FLL IS_TDET ID IS_TDET VOVSO IS_PERIOD VIDTH ADC ADC ADC ADC ID DETECT ENABLE CASE 1: LOW-IMPEDANCE RESISTOR UNPLUGGED DURING THE IS_PERIOD. ID IS_TDET VOVSO IS_TDET IS_TDET IS_PERIOD VIDTH ID DETECT ENABLE CASE 2: HIGH-IMPEDANCE RESISTOR UNPLUGGED DURING THE IS_PERIOD. ID IS_TDET VOVSO IS_PERIOD IS_TDET VIDTH ADC ADC ADC ADC ID DETECT ENABLE CASE 3: LOW-IMPEDANCE RESISTOR CONTINUOUSLY CONNECTED DURING THE IS_PERIOD. Figure 1. Current Source On-Time Timing Diagram (IS_INIT_SET = 0) www.maximintegrated.com Maxim Integrated │  14 MAX20330A Precision HV Capable ID Detector Detailed Description The MAX20330A is a universal ID detection IC that detects the ID resistor values when it is enabled. The device automatically adjusts the detection current to check the wide range of the ID resistor values while keeping the average supply current low. The device can be used in many different applications such as accessory detection, secure factory mode, connector wet detection, etc. EN pin and ENb Bit The MAX20330A is enabled by EN pin and ENb bit. ENb bit is defaulted to 0. The ID check is enabled when EN goes low after debounce time (100ms, typ). All the registers are reset to default values when the device enters shutdown. EN (pin) ENb (I2C) STATUS 1 0 Shutdown 1 1 Shutdown 0 0 Active 0 1 Shutdown 36VDC (40V Abs Max) Withstanding The MAX20330A can withstand the DC voltage up to 40V on ID pin. If 40V input is expected, it is recommended to use the external TVS that clamps the surge to 40V or below. Factory Mode When the MAX20330A determines that the final ADC value is within the range of the factory resistor value in the preset I2C registers, it enables the factory mode check. The factory mode can be enabled or disabled by the I2C register bit FM_ENb. The factory mode starts when the MAX20330A finds the ADC resistor value is within the factory resistor value range. Then the device must find out that the ID pin is biased with the voltage higher than 2.7V (typ). The factory ID resistor must be present for at least the total period equals to the sum of 2xIS_TDET and IS_PERIOD. There is no limit how long the resistor can be present until the ID is biased by the factory mode power supply. The factory www.maximintegrated.com mode is cancelled either the ID resistor changes prior to the presence of the factory mode power supply presence or removing of the factory bias voltage. Also set ENb bit in I2C register high cancels the factory mode. 3.5mm Moisture Detection Application The MAX20330A can be used to determine the faulty insertion of the jack due to a wrong impedance detection of the connector by moisture intrusion. The ACC_DET interrupt can be used to identify the valid accessory insertion and disconnect detection of the accessory. The accessory detection threshold can be adjusted for issuing the proper accessory detection interrupt based on a valid jack impedance. Thermal Shutdown Thermal shutdown circuitry protects the devices from overheating. When the junction temperature exceeds +125°C (typ), the THERM_SHDN bit and interrupt are on. Application Information I2C Interface When in I2C mode, the MAX20330A operates as a slave device that sends and receives data through an I2Ccompatible 2-wire interface. The interface uses a serial data line (SDA) and a serial clock line (SCL) to achieve bidirectional communication between master(s) and slave(s). A master (typically a microcontroller) initiates all data transfers to and from the MAX20330A and generates the SCL clock that synchronizes the data transfer. The SDA line operates as both an input and an open-drain output. A pullup resistor is required on SDA. The SCL line operates only as an input. A pullup resistor is required on SCL if there are multiple masters on the 2-wire interface, or if the master in a single-master system has an opendrain SCL output. Each transmission consists of a START condition sent by a master, followed by the MAX20330A 7-bit slave address plus R/W bit, a register address byte, one or more data bytes, and finally a STOP condition (Figure 2). Maxim Integrated │  15 MAX20330A Precision HV Capable ID Detector Start and Stop Conditions Bit Transfer Both SCL and SDA remain high when the interface is not busy. A master signals the beginning of a transmission with a START (S) condition by transitioning SDA from high to low while SCL is high (Figure 3). When the master has finished communicating with the slave, it issues a STOP (P) condition by transitioning SDA from low to high while SCL is high. The bus is then free for another transmission. One data bit is transferred during each clock pulse (Figure 4). The data on SDA must remain stable while SCL is high. Changes in SDA while SCK is high and stable are considered control signals (see Start and Stop Conditions). tR SDA tSU:DAT tSU:STA tLOW tHD:DAT tBUF tHD:STA tSU:STO tHIGH SCL tHD:STA tR START CONDITION REPEATED START CONDITION STOP CONDITION START CONDITION Figure 2. I2C Interface Timing Details SDA SCL S P START CONDITION STOP CONDITION Figure 3. Start and Stop Conditions SDA SCL DATA LINE STABLE; DATA VALID CHANGE OF DATA ALLOWED Figure 4. Bit Transfer www.maximintegrated.com Maxim Integrated │  16 MAX20330A Precision HV Capable ID Detector Acknowledge Bus Reset The MAX20330A resets the bus with the I2C start condition for reads. When the R/W bit is set to 1, the device transmits data to the master, thus the master is reading from the device. The acknowledge bit is a clocked 9th bit (Figure 5), which the recipient uses to handshake receipt of each byte of data. Thus, each byte transferred effectively requires 9 bits. The master generates the 9th clock pulse, and the recipient pulls down SDA during the acknowledge clock pulse. The SDA line is stable low during the high period of the clock pulse. When the master is transmitting to the MAX20330A, it generates the acknowledge bit because the device is the recipient. When the device is transmitting to the master, the master generates the acknowledge bit because the master is the recipient. If the device did not pull SDA low, a not acknowledge is indicated. Format for Writing A write to the MAX20330A comprises the transmission of the slave address with the R/W bit set to zero, followed by at least 1 byte of information. The first byte of information is the register address or command byte. The register address determines which register of the device is to be written by the next byte, if received. If a STOP (P) condition is detected after the register address is received, then the device takes no further action beyond storing the register address. Any bytes received after the register address are data bytes. The first data byte goes into the register selected by the register address and subsequent data bytes go into subsequent registers (Figure 6). If multiple data bytes are transmitted before a STOP condition, these bytes are stored in subsequent registers because the register addresses autoincrement (Figure 7). Slave Address The MAX20330A features a 7-bit slave address: 1010 111. The bit following a 7-bit slave address is the R/W bit, which is low for a write command and high for a read command. CLOCK PULSE FOR ACKNOWLEDGEMENT START CONDITION SCL 1 2 8 9 SDA BY TRANSMITTER SDA BY RECEIVER S Figure 5. Acknowledge ADDRESS = 0xAE S 1 0 1 0 1 REGISTER ADDRESS = 0x01 0 = WRITE 1 1 0 A REGISTER 0x01 WRITE DATA 0 0 0 0 0 0 0 1 A S = START BIT P = STOP BIT d7 d6 d5 d4 d3 d2 d1 d0 A P A = ACK N = NACK d_ = DATA BIT Figure 6. Format for I2C Write www.maximintegrated.com Maxim Integrated │  17 MAX20330A Precision HV Capable ID Detector Format for Reading The MAX20330A is read using the internally stored register address as an address pointer, the same way the stored register address is used as an address pointer for a write. The pointer autoincrements after each data byte is read using the same rules as for a write. Thus, a read is initiated by first configuring the register address by ADDRESS = 0xAE S 1 0 1 0 performing a write (Figure 8). The master can now read consecutive bytes from the device, with the first data byte being read from the register addressed pointed by the previously written register address (Figure 9). Once the master sounds a NACK, the MAX20330A stops sending valid data. REGISTER ADDRESS = 0x01 0 = WRITE 1 1 1 0 A 0 0 0 d6 d5 d4 d3 d2 0 0 0 1 A d1 d0 A/N REGISTER 0x02 WRITE DATA REGISTER 0x01 WRITE DATA d7 0 d1 d0 A d7 d6 d5 d4 d3 d2 P Figure 7. Format for Writing to Multiple Registers 0 = WRITE ADDRESS = 0xAE S 1 0 1 0 1 1 1 1 0 1 0 1 A 0 0 1 = READ ADDRESS = 0xAF Sr 0 REGISTER ADDRESS = 0x01 1 1 1 0 0 0 0 0 1 A/N d1 d0 A/N REGISTER 0x01 READ DATA A d7 d6 d5 d4 d3 d2 P Figure 8. Format for Reads (Repeated Start) www.maximintegrated.com Maxim Integrated │  18 MAX20330A Precision HV Capable ID Detector 0 = WRITE ADDRESS = 0xAE S 1 0 1 0 1 1 1 1 0 1 0 1 A 0 0 0 1 = READ ADDRESS = 0xAF Sr REGISTER ADDRESS = 0x01 1 1 d6 d5 d4 d3 d2 0 0 0 0 1 A/N d1 d0 A d1 d0 A/N REGISTER 0x01 READ DATA A 1 d7 d6 REGISTER 0x02 READ DATA d7 0 d5 d4 d3 d2 REGISTER 0x03 READ DATA d1 A d0 d7 d6 d5 d4 d3 d2 P Figure 9. Format for Reading Multiple Registers Typical Application Circuits PMI C SW_CHG IN OUT QBAT V SY S V BA T BATTERY NOT INSTALL ED FOR FACTORY MODE R GPU V SY S U SB micro B VBUS PCON ID GND www.maximintegrated.com V IO VCC ID RPU V IO RPU VIO R PU SDA SDA SCL SCL INT INT EN ID_EN APPS PROCESSOR MAX20330A GND Maxim Integrated │  19 MAX20330A Precision HV Capable ID Detector Typical Application Circuits (continued) AUDIO CODEC 3.5mm JACK SW_CHG RMIC MI C_BIAS MI C MI C_IN R-Audio RA L-Audio LA 1MΩ IS OPTIONAL DEPENDING ON L-DET B IAS BY THE AUDIO CODEC GND 100kΩ 1MΩ EN VCC VCC PCON L-DET VIO RPU VIO RPU SDA SDA SCL SCL INT INT ID 10kΩ VIO RPU APPS PROCESSOR MAX20330A GND Ordering Information Package Information PART TOP MARK TEMP RANGE PINPACKAGE MAX20330AEWA+T CB -40°C TO +85°C 8 WLP + Denotes lead(Pb)-free/RoHS-compliant package. T = Tape and reel. Chip Information PROCESS: BiCMOS www.maximintegrated.com For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. PACKAGE TYPE PACKAGE CODE OUTLINE NO. LAND PATTERN NO. 8 WLP W81B1+1 21-100229 Refer to Application Note 1891 Maxim Integrated │  20 MAX20330A Precision HV Capable ID Detector Revision History REVISION NUMBER REVISION DATE 0 3/18 Initial release — 1 6/18 Updated Table 2 12 DESCRIPTION PAGES CHANGED For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com. Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance. Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc. © 2018 Maxim Integrated Products, Inc. │  21