> 5.5 | Pin Assignment and Signal Description

> The Molex board-to-board connector on TC65 is an 80-pin double-row receptacle. Pin names and numbers are listed in Table 29. The pin positions can be gathered from Figure 47.

> Table 29: | Pin assignment

> 1 | GND | GND | 80
> 2 | ADC1_IN | DAC_OUT | 79
> 3 | ADC2_IN | PWR_IND | 78
> 4 | GND | Do not use | 77
> 5 | GPIO10 | GPIO9 | 76
> 6 | GPIO8 | SPICS | 75
> 7 | SPIDI | GPIO4 | 74
> 8 | GPIO7 | GPIO3 | 73
> 9 | GPIO6 | GPIO2 | 72
> 10 | GPIO5 | GPIO1 | 71
> 11 | I2CCLK_SPICLK | I2CDAT_SPIDO | 70
> 12 | VUSB_IN | USB_DP | 69
> 13 | DAI5 | USB_DN | 68
> 14 | ISENSE | VSENSE | 67
> 15 | DAI6 | VMIC | 66
> 16 | CCCLK | EPN2 | 65
> 17 | CCVCC | EPP2 | 64
> 18 | CCIO | EPP1 | 63
> 19 | CCRST | EPN1 | 62
> 20 | CCIN | MICN2 | 61
> 21 | CCGND | MICP2 | 60
> 22 | DAI4 | MICP1 | 59
> 23 | DAI3 | MICN1 | 58
> 24 | DAI2 | AGND | 57
> 25 | DAI1 | IGT | 56
> 26 | DAI0 | EMERG_RST | 55
> 27 | BATT_TEMP | DCD0 | 54
> 28 | SYNC | CTS1 | 53
> 29 | RXD1 | CTS0 | 52
> 30 | RXD0 | RTS1 | 51
> 31 | TXD1 | DTR0 | 50
> 32 | TXD0 | RTS0 | 49
> 33 | VDDLP | DSR0 | 48
> 34 | VCHARGE | RING0 | 47
> 35 | CHARGEGATE | VEXT | 46
> 36 | GND | BATT+ | 45
> 37 | GND | BATT+ | 44
> 38 | GND | BATT+ | 43
> 39 | GND | BATT+ | 42
> 40 | GND | BATT+ | 41

> Please note that the reference voltages listed in Table 30 are the values measured directly on the TC65 module. They do not apply to the accessories connected
> .

> Table 30: | Signal description

> Function | Signal name | IO | Signal form and level | Comment
> Power supply | BATT+ | I | V Imax = 4.5V V Ityp = 3.8V V Imin = 3.2V during Tx burst on board I ≈ 2A, during Tx burst n Tx = n x 577µs peak current every 4.616ms | Five pins of BATT+ and GND must be connected in parallel for supply purposes because higher peak currents may occur. Minimum voltage must not fall below 3.2V including drop, ripple, spikes.
> Power supply | GND |  | Ground | Application Ground
> Charge Interface | VCHARGE | I | V Imin = 1.015 * VBATT+ VImax = 5.45V | This line signalizes to the processor that the charger is connected. If unused keep pin open.
> BATT_TEMP | I | Connect NTC with R NTC ≈ 10kΩ @ 25°C to ground. See Section 3.5.3 for B value of NTC. | Battery temperature measurement via NTC resistance. NTC should be installed inside or near battery pack to enable proper charging and deliver temperature values. If unused keep pin open.
> ISENSE | I | V Imax = 4.65V ΔVImax to VBATT+ = +0.3V at normal condition | ISENSE is required for measuring the charge current. For this purpose, a shunt resistor for current measurement needs to be connected between ISENSE and VSENSE. If unused connect pin to VSENSE.
> VSENSE | I | V Imax = 4.5V | VSENSE must be directly connected to BATT+ at battery connector or external power supply.
> CHARGEGATE | O | V Omax = 5.5V IOmax = 0.6mA | Control line to the gate of charge FET If unused keep pin open.
> External supply voltage | VEXT | O | Normal mode: V Omin = 2.75V VOtyp = 2.93V VOmax = 3.05V IOmax = -50mA | VEXT may be used for application circuits, for example to supply power for an I2C If unused keep pin open. Not available in Power-down mode. The external digital logic must not cause any spikes or glitches on voltage VEXT.
> Power indicator | PWR_IND | O | V IHmax = 10V V OLmax = 0.4V at Imax = 2mA | PWR_IND (Power Indicator) notifies the module’s on/off state. PWR_IND is an open collector that needs to be connected to an external pull-up resistor. Low state of the open collector indicates that the module is on. Vice versa, high level notifies the Power-down mode. Therefore, the pin may be used to enable external voltage regulators which supply an external logic for communication with the module, e.g. level converters.
> Ignition | IGT | I | Internal pull-up: R I ≈ 30kΩ, CI ≈ 10nF VILmax = 0.8V at Imax = -150µA VOHmax = 4.5V (VBATT+) ON ~~~|____|~~~ Active Low > 400ms | This signal switches the mobile on. This line must be driven low by an open drain or open collector driver.
> Emergency reset | EMERG_RST | I | Internal pull-up: R I ≈ 5kΩ VILmax = 0.2V at Imax = -0.5mA VOHmin = 1.75V V OHmax = 3.05V Signal ~~~|______|~~~ Pull down > 10ms | Reset or turn-off in case of emergency: Pull down and release EMERG_RST. Then, activating IGT for 400ms will reset TC65. If IGT is not activated for 400ms, TC65 switches off. Data stored in the volatile memory will be lost. For orderly software controlled reset rather use the AT+CFUN command (e.g. AT+CFUN=x,1). This line must be driven by open drain or open collector. If unused keep pin open.
> Power-on reset | O | Internal pull-up: R I ≈ 5kΩ VOLmax = 0.2V at I = 2mA VOHmin = 1.75V V OHmax = 3.05V Reset signal driven by the module: (see also Figure 5 and Figure 6) | Reset signal driven by the module which can be used to reset any application or device connected to the module. Only effective for 120ms during the assertion of IGT when the module is about to start (see also Section 3.3.1.6).
> Synchroni-zation | SYNC | O | V OLmax = 0.3V at I = 0.1mA V OHmin = 2.3V at I = -0.1mA V OHmax = 3.05V n Tx = n x 577µs impulse each 4.616ms, with 180µs forward time. | There are two alternative options for using the SYNC pin: a) Indicating increased current consumption during uplink transmission burst. Note that the timing of the signal is different during handover. b) Driving a status LED to indicate different operating modes of TC65. The LED must be installed in the host application. To select a) or b) use the AT^SSYNC command. If unused keep pin open.
> RTC backup | VDDLP | I/O | R I ≈ 1kΩ VOmax = 4.5V V BATT+ = 4.3V: VO = 3.2V at IO = -500µA V BATT+ = 0V: VI = 2.4V…4.5V at Imax = 25µA | If unused keep pin open.
> ASC0 Serial interface | RXD0 | O | V OLmax = 0.2V at I = 2mA VOHmin = 2.55V at I = -0.5mA VOHmax = 3.05V V ILmax = 0.8V VIHmin = 2.15V V IHmax = VEXTmin + 0.3V = 3.05V Internal pull-down at TXD0: R I =330kΩ Internal pull-down at RTS0: R I =330kΩ | Serial interface for AT commands or data stream. If lines are unused keep pins open.
> TXD0 | I
> CTS0 | O
> RTS0 | I
> DTR0 | I
> DCD0 | O
> DSR0 | O
> RING0 | O
> ASC1 Serial interface | RXD1 | O | V OLmax = 0.2V at I = 2mA VOHmin = 2.55V at I = -0.5mA VOHmax = 3.05V V ILmax = 0.8V VIHmin = 2.15V V IHmax = VEXTmin + 0.3V = 3.05V Internal pull-down at TXD1: R I =330kΩ Internal pull-down at RTS1: R I =330kΩ | 4-wire serial interface for AT commands or data stream. If lines are unused keep pins open.
> TXD1 | I
> CTS1 | O
> RTS1 | I
> SIM interface specified for use with 3V SIM card | CCIN | I | R I ≈ 100kΩ VILmax = 0.6V at I = -25µA VIHmin = 2.1V at I = -10µA VOmax = 3.05V | CCIN = Low, SIM card holder closed Maximum cable length or copper track 100mm to SIM card holder. All signals of SIM interface are protected against ESD with a special diode array. Usage of CCGND is mandatory.
> CCRST | O | R O ≈ 47Ω VOLmax = 0.25V at I = +1mA VOHmin = 2.5V at I = -0.5mA VOHmax = 2.95V
> CCIO | I/O | R I ≈ 4.7kΩ VILmax = 0.75V VILmin = -0.3V VIHmin = 2.1V VIHmax = CCVCCmin + 0.3V = 3.05V R O ≈ 100Ω VOLmax = 0.3V at I = +1mA VOHmin = 2.5V at I = -0.5mA VOHmax = 2.95V
> CCCLK | O | R O ≈ 100Ω VOLmax = 0.3V at I = +1mA VOHmin = 2.5V at I = -0.5mA VOHmax = 2.95V
> CCVCC | O | V Omin = 2.75V VOtyp = 2.85V VOmax = 2.95V IOmax = -20mA
> CCGND |  | Ground
> SIM interface specified for use with 1.8V SIM card | CCIN | I | R I ≈ 100kΩ VILmax = 0.6V at I = -25µA VIHmin = 2.1V at I = -10µA VOmax = 3.05V | CCIN = Low, SIM card holder closed Maximum cable length or copper track 100mm to SIM card holder. All signals of SIM interface are protected against ESD with a special diode array. Usage of CCGND is mandatory.
> CCRST | O | R O ≈ 47Ω VOLmax = 0.25V at I = +1mA VOHmin = 1.45V at I = -0.5mA VOHmax = 1.90V
> CCIO | I/O | R I ≈ 4.7kΩ VILmax = 0.45V VIHmin = 1.35V VIHmax = CCVCCmin + 0.3V = 2.00V R O ≈ 100Ω VOLmax = 0.3V at I = +1mA VOHmin = 1.45V at I = -0.5mA VOHmax = 1.90V
> CCCLK | O | R O ≈ 100Ω VOLmax = 0.3V at I = +1mA VOHmin = 1.45V at I = -0.5mA VOHmax = 1.90V
> CCVCC | O | V Omin = 1.70V, VOtyp = 1.80V VOmax = 1.90V IOmax = -20mA
> CCGND |  | Ground
> I 2C interface | I2CCLK_SPICLK | O | V OLmax = 0.2V at I = 2mA VOHmin = 2.55V at I = -0.5mA VOHmax = 3.05V | I 2C interface is only available if the two pins are not used as SPI interface… continues next page. I2CDAT is configured as Open Drain and needs a pull-up resistor in the host application. According to the I 2C Bus Specification Version 2.1 for the fast mode a rise time of max. 300ns is permitted. There is also a maximum VOL=0.4V at 3mA specified. The value of the pull-up depends on the capacitive load of the whole system (I2C Slave + lines). The maximum sink current of I2CDAT and I2CCLK is 4mA. If lines are unused keep pins open.
> I2CDAT_SPIDO | I/O | V OLmax = 0.2V at I = 2mA VILmax = 0.8V VIHmin = 2.15V V IHmax = VEXTmin + 0.3V = 3.05V
> SPI Serial Peripheral Interface | SPIDI | I | V OLmax = 0.2V at I = 2mA VOHmin = 2.55V at I = -0.5mA VOHmax = 3.05V V ILmax = 0.8V VIHmin = 2.15V, VIHmax = VEXTmin + 0.3V = 3.05V | If the Serial Peripheral Interface is active the I2C interface is not available. If lines are unused keep pins open.
> I2CDAT_SPIDO | O
> I2CCLK_SPICLK | O
> SPICS | O
> USB | VUSB_IN | I | V INmin = 4.0V VINmax = 5.25V | All electrical characteristics according to USB Implementers’ Forum, USB 2.0 Full Speed Specification. Without Java: USB port Under Java: Debug interface for development purposes. If lines are unused keep pins open.
> USB_DN | I/O | Differential Output Crossover voltage Range VCRSmin = 1.5V, VCRSmax = 2.0V Line to GND: V OHmax = 3.6V V OHtyp = 3.2V VOHmin = 3.0V at I=-0.5mA V OLmax = 0.2V at I=2mA VIHmin = 2.24V VILmax = 0.96V Driver Output Resistance Ztyp = 32Ohm Pullup at USB_DP R typ=1.5kOhm
> USB_DP | I/O
> Analog Digital Converter | ADC1_IN | I | Input voltage: VImin = 0V, VImax = 2.4V Ri ≈ 750kOhms Measurement interval: 100ms - 30s selectable by AT command Resolution: 2400 steps (1step = 1mv) Accuracy total: ±2mV Cut-off frequency: 30 Hz Underflow: > -25mV Overflow: > +2425 mV Accuracy: ± 0.5mV Linear error: ± 0.5mV Temperature error: ± 0.5mV Burst error: ± 0.5mV | Inputs used for measuring external voltages. ADC1_IN and ADC2_IN are internally multiplexed through analog switch. For restrictions during SLEEP mode please see to Section 3.16.
> ADC2_IN | I
> Digital Analog Converter | DAC_OUT | O | V OLmax = 0.2V at I = 2mA VOHmin = 2.55V at I = -0.5mA VOHmax = 3.05V | PWM signal which can be smoothed by an external filter. Use the AT^SWDAC command to open and configure the DAC_OUT output.
> General Purpose Input/Output | GPIO1 | I/O | V OLmax = 0.2V at I = 2mA VOHmin = 2.55V at I = -0.5mA VOHmax = 3.05V V ILmax = 0.8V VIHmin = 2.15V, VIHmax = VEXTmin + 0.3V = 3.05V Pulse counter: pulse ~|________|~~~~~~~~~~~~|________|~ | > 450µs | > 450µs | Slew rate < 1µs Pulse rate: max. 1000 pulses per second | Recommendation: Connect pull-up or pull-down resistors to all GPIO pins intended for use as output. See also Section 3.17. If lines are unused (not configured) keep pins open. Alternatively, the GPIO10 pin can be configured as a pulse counter for pulse rates from 0 to 1000 pulses per second.
> GPIO2 | I/O
> GPIO3 | I/O
> GPIO4 | I/O
> GPIO5 | I/O
> GPIO6 | I/O
> GPIO7 | I/O
> GPIO8 | I/O
> GPIO9 | I/O
> GPIO10 | I/O
> Digital Audio interface | DAI0 | O | V OLmax = 0.2V at I = 2mA VOHmin = 2.55V at I = -0.5mA VOHmax = 3.05V V ILmax = 0.8V VIHmin = 2.15V V IHmax = VEXTmin + 0.3V = 3.05V | See Table 17 for details. If unused keep pins open.
> DAI1 | I
> DAI2 | O
> DAI3 | O
> DAI4 | I
> DAI5 | I
> DAI6 | I
> Analog Audio interface | VMIC | O | V Omin = 2.4V VOtyp = 2.5V VOmax = 2.6V Imax = 2mA | Microphone supply for customer feeding circuits
> EPP2 | O | 3.0Vpp differential typical @ 0dBm0 4.2Vpp differential maximal @ 3.14dBm0 Measurement conditions: Audio mode: 6 Outstep 3 No load Minimum differential resp. single ended load 27Ohms | The audio output can directly operate a 32-Ohm-loudspeaker. If unused keep pins open.
> EPN2 | O
> EPP1 | O | 4.2Vpp (differential) typical @ 0dBm0 6.0Vpp differential maximal @ 3.14dBm0 Measurement conditions: Audio mode: 5 Outstep 4 No load Minimum differential load 7.5Ohms | The audio output can directly operate an 8-Ohm-loudspeaker. If unused keep pins open.
> EPN1 | O
> MICP1 | I | Full Scale Input Voltage: 1.6Vpp 0dBm0 Input Voltage: 1.1Vpp At MICN1, apply external bias from 1.0V to 1.6V. Measurement conditions: Audio mode: 5 | Balanced or single ended microphone or line input with external feeding circuit (using VMIC and AGND). If unused keep pins open.
> MICN1 | I
> MICP2 | I | Full Scale Input Voltage: 1.6Vpp 0dBm0 Input Voltage: 1.1Vpp At MICN2, apply external bias from 1.0V to 1.6V. Measurement conditions: Audio mode: 6 | Balanced or single ended microphone or line input with external feeding circuit (using VMIC and AGND). If unused keep pins open.
> MICN2 | I
> AGND |  | Analog Ground | GND level for external audio circuits