HT42B534-2

HT42B534-x USB to UART Bridge IC Features • Supports standard Windows® drivers for Virtual Com Port (VCP): Windows XP (SP2), Vista, Widows 7 & Windows 8 (only an INF file is required), Windows 10 • Operating Voltage (VDD): 3.3V~5.5V • UART pin Voltage (VDDIO): 1.8V~VDD (Less than VDD voltage) • Supports Android 4.0 or later version and Mac OS X • Power down and wake-up functions to reduce power consumption • Integrated 256 bytes true EEPROM for user memory • Package types: 8-pin SOP, 10-pin SOP/MSOP, 16-pin NSOP • Fully integrated 12MHz oscillator with 0.25% accuracy for all USB modes which requires no external components General Description • USB interface ♦♦ USB 2.0 Full Speed compatible ♦♦ Implements USB protocol composite device: –– Communication Device Class (CDC) for communications and configuration –– Human Interface Device (HID) for user configure USB VID, PID and device description strings ♦♦ Internal 1.5kΩ pull-high resistor on D+ pin The HT42B534-x device is a high performance USB to UART bridge controller with fully integrated USB and UART interface functions, designed for applications that communicate with various types of UART. The device includes a USB 2.0 full speed compatible interface which is used for PC communication. The device also includes a fully integrated high speed oscillator which is used as clock source for the USB and UART baud rate generator. The baud rate generator can support up to 3Mbps of baud rate for the UART interface. • Fully-duplex Universal Asynchronous Receiver and Transmitter Interface – UART ♦♦ Supports Baud Rate up to 3Mbps ♦♦ Supports maximum 128 bytes transmit buffer and 128 bytes receive buffer ♦♦ UART Data formats supported: –– Data bits: 8 –– Stop bits: 1 and 2 –– Parity: odd, even, no parity ♦♦ Supports RTS/CTS pins for auto flow control ♦♦ Supports RX pin resume signal to request a remote wake-up ♦♦ Supports VDDIO pin for UART pins power supply Rev. 1.00 1 December 09, 2016 HT42B534-x USB Bridge IC Naming Rules HT42B 5 3 4 - x Product Family HT42B = Holtek Bridge IC Version Bridge Series of Host 5 = USB 1 = First Version USB Class type Bridge Series of Device 3 = CDC Class 6 = HID Class 2 = I2C 3 = SPI 4 = UART Selection Table Part No. Description VDD USB Virtual HID COM FIFO/Buffer Interface Data Rate I/O VDD Package HT42B532-x USB to I2C Bridge √ — TX: 62 bytes RX: 62 bytes Up to 400kHz √ 8SOP 10MSOP HT42B533-x USB to SPI Bridge √ — TX: 128 bytes RX: 128 bytes Up to 8MHz √ 10MSOP 16NSOP √ — TX: 128 bytes RX: 128 bytes Up to 3Mbps Baud √ 8SOP 10SOP/MSOP 16NSOP — √ TX: 32 bytes RX: 32 bytes Up to 115.2kbps Baud √ 10SOP HT42B534-x USB to UART Bridge HT42B564-x 3.3V~ 5.5V Full-Speed USB (HID) to UART Bridge Block Diagram VDD 3.3V Regulator Internal Oscillator Baud Rate Generator GND VDDIO V33O D+ D- USB PHY VID PID Configure Rev. 1.00 Device Power 128B TX Buffer USB Controller UART 128B RX Buffer 2 TX RX CTS RTS DSR DTR DSD RI LED UDET External RS-232 TRansceiver or UART Circuitry December 09, 2016 HT42B534-x Pin Assignment 1 1 8 V33O VDD 10 GND 2 9 TX VDDIO V33O 2 7 VDD GND 3 8 3 6 D- 4 7 RX 4 5 D+ CTS TX 5 6 D+ DRTS RX VDDIO HT42B534-x 10 MSOP-A HT42B534-x 8 SOP-A D+ 1 16 VDD D- 2 15 RI V33O 3 14 DCD GND 4 13 RTS D+ 1 10 CTS 5 12 VDD 2 9 TX V33O 3 8 TX LED 4 7 5 6 6 11 DSR RX UDET 7 10 VDDIO LED 8 9 DTR HT42B534-x 16 NSOP-A DGND RX VDDIO UDET HT42B534-x 10 SOP-A Package Type Marking 8SOP HT42B534-x 10SOP HT42B534-x 10MSOP B534-x 16NSOP HT42B534-x Note: x=1 for version number. Pin Description As the Pin Description table applies to the package type with the most pins, not all of the listed pins may be present on package types with smaller numbers of pins. Pin Name Type Description D+ I/O USB D+ Line D- I/O USB D- Line TX O Asynchronous data output (UART Transmit) RX I Asynchronous data input (UART Receive) CTS I Clear To Send control input, active low RTS O Ready to Send control output, active low DSR I Data Set Ready control input, active low DTR O Data Terminal Ready control output, active low DCD I Data Carrier Detect control input, active low RI I Ring Indicator control input, active low LED O TX/RX signal LED indication, active low UDET I USB plug in/out detect pin, only for 10-pin SOP package O 3.3V regulator output V33O VDDIO PWR Positive power supply for TX/RX/CTS/RTS/DSR/DTR/DCD/RI pins VDD PWR Positive power supply, USB bus power GND PWR Negative power supply, ground Rev. 1.00 3 December 09, 2016 HT42B534-x Absolute Maximum Ratings Supply Voltage.........................VSS−0.3V to VSS+6.0V IOH Total............................................................. -80mA Input Voltage........................... VSS−0.3V to VDD+0.3V IOL Total.............................................................. 80mA Storage Temperature............................-50˚C to 125˚C Total Power Dissipation.................................. 500mW Operating Temperature..........................-40˚C to 85˚C Note: These are stress ratings only. Stresses exceeding the range specified under “Absolute Maximum Ratings” may cause substantial damage to this device. Functional operation of this device at other conditions beyond those listed in the specification is not implied and prolonged exposure to extreme conditions may affect devices reliability. D.C Characteristics Symbol Parameter Ta=25°C Test Conditions VDD Conditions Min. Typ. Max. Unit V VDD Operating Voltage — — 3.3 — 5.5 VDDIO UART Pins VDDIO Input Voltage — — 1.8 — VDD V IDD Operating Current 5V No load — 11 16 mA ISUS Suspend Current (USB) 5V Suspend mode, No load, USB on, other peripherals off — 360 450 μA ISTB Standby Current (Non-USB) for 10-pin SOP package only 3V Standby mode, No load, USB Plug-out, other peripherals off, VDD power is from VDDIO – 0.1 1.0 μA VIL Input Pins Input Low Voltage — — 0 — 0.2VDDIO V VIH Input Pins Input High Voltage — — 0.8VDDIO — VDDIO V 4 8 — mA 10 20 — mA -2 -4 — mA -5 -10 — mA IOL I/O Pins Sink Current 3V 5V 3V IOH I/O Pins Source Current RPH I/O Pins Pull-high Resistance ILEAK Input Leakage Current VV33O 3.3V Regulator Output Voltage RUDP1 Pull-high Resistance between D+ 3.3V and V33O Rev. 1.00 5V VOL = 0.1VDDIO VOH = 0.9VDDIO 3V — 20 60 100 kΩ 5V — 10 30 50 kΩ — — ±1 μA — — ±1 μA 3.0 3.3 3.6 V -5% 1.5 +5% kΩ 3V 5V 5V VIN = VDD or VIN = VSS IV33O = 70mA — 4 December 09, 2016 HT42B534-x A.C Characteristics Symbol Parameter Ta=25°C Test Condition Condition VDD Min. Typ. -0.25% 12 Max. Unit fHIRC High Speed Internal RC Oscillator 3.3V~5.5V USB mode +0.25% MHz tSST System Start-up Timer Period — RX pin Wake-up from power down mode 16 — — tHIRC tRSTD System Reset Delay Time — Power-on reset 25 50 100 ms Power-on Reset Characteristics Symbol Ta=25°C Test Conditions Parameter VDD Conditions Min. Typ. Max. Unit VPOR VDD Start Voltage to Ensure Power-on Reset — — — — 100 mV RRPOR VDD Rising Rate to Ensure Power-on Reset — — 0.035 — — V/ms tPOR Minimum Time for VDD Stays at VPOR to Ensure Power-on Reset — — 1 — — ms VDD tPOR RRPOR VPOR Rev. 1.00 5 Time December 09, 2016 HT42B534-x USB Interface As the USB device has a remote wake-up function, the USB device can wake up the USB host by sending a remote wake-up pulse. Once the USB host receives a remote wake-up signal from the USB device, the host will send a resume signal to device. The USB interface, being USB 2.0 full-speed compatible, is a 4-wire serial bus that allows communication between a host device and up to 127 max peripheral devices on the same bus. A token based protocol method is used by the host device for communication control. Other advantages of the USB bus include live plugging and unplugging and dynamic device configuration. As the complexity of USB data protocol does not permit comprehensive USB operation information to be provided in this datasheet, the reader should therefore consult other external information for a detailed USB understanding. USB VID and PID Configuration The device has configured the default Vendor ID (VID:0x04D9), Product ID (PID:0xB534) and product description strings of “USB to UART Bridge”. The user can update the Vendor ID, Product ID, product description strings and remote wake-up setting using their application program. This device has been configured to the default USB configuration data as shown in the following table. Power Planes There are two power planes for the device and they are the USB bus power input (VDD) and 3.3V regulator output (V33O). Parameter For the USB SIE VDD will supply all circuits related to USB SIE and be sourced from pin “VDD”. Once the USB is removed from the USB and there is no power in the USB BUS, the USB SIE circuit is no longer operational. USB Interface Operation 0x04D9 USB Product ID (PID) 0xB534 Remote wake-up Default disable Manufacturer Name Holtek Product Description USB to UART Bridge Serial Number 0000 UART Interface To communicate with an external USB host, the internal USB module has external pins known as D+ and D- along with the 3.3V regulator output V33O. A Serial Interface Engine (SIE) decodes the incoming USB data stream and transfers it to the correct endpoint buffer memory known as the FIFO. The USB module has 4 endpoints, EP0 ~ EP3. The endpoint 0 supports the Control transfer while the endpoint 1 ~ endpoint 3 support the Interrupt or Bulk transfer. The HT42B534-x Bridge IC supports the USB Communication Device Class (CDC) for communications and configuration. The HT42B534-x contains an integrated full-duplex asynchronous serial communications UART interface that enables communication with external devices that contain a serial interface. The UART function has many features and can transmit and receive data serially by transferring a frame of data with eight data bits per transmission as well as being able to detect errors when the data is overwritten or incorrectly framed. The UART function possesses its own internal interrupt which can be used to indicate when a reception occurs or when a transmission terminates. 0 Control The integrated UART function contains the following features: 1 Interrupt 2 Bulk Out • Full-duplex, asynchronous communication 3 Bulk In Endpoint Transfer Type • 8 bits character length • Even, odd or no parity options USB Endpoint Transfer Type • One or two stop bits If there is no signal on the USB bus for over 3ms, the USB device will enter the suspend mode. The device enters the suspend state to meet the requirements of the USB suspend current specification. When the resume signal is asserted by the USB host, the device will be woken up and leave the suspend mode. Rev. 1.00 Value (hex) USB Vendor ID (VID) • Baud rate generator with prescaler • 128-byte Deep FIFO Transmit Data Buffer • 128-byte Deep FIFO Receive Data Buffer • RX pin wake-up function • UART pins power supply by VDDIO pin 6 December 09, 2016 HT42B534-x UART External Pin UART Power Down and Wake-up To communicate with an external serial interface, the internal UART has two external pins known as TX and RX. The TX and RX pins are the UART transmitter and receiver pins respectively. If the USB host sends a suspend signal to the HT42B534-x USB device, it will enter the suspend mode. It is recommended to ensure that the UART data transmission or reception has been finished before the device enters the suspend mode. UART Data Transfer Scheme The UART function contains a receiver RX pin wakeup function. A falling edge on the RX pin will wake up the device from the suspend mode. The data will be transferred to the Transmit Shift Register from where it will be shifted out, LSB first, onto the TX pin at a rate controlled by the Baud Rate Generator. Data to be received by the UART is accepted on the external RX pin, from where it is shifted in, LSB first, to the Receiver Shift Register at a rate controlled by the Baud Rate Generator. The UART interface provides a 128 byte deep FIFO transmit data buffer and a 128 byte deep FIFO receive data buffer for applications. Application Program Demo Holtek USB Bridge Program Holtek provides an application program to setup the HT42B534-x Bridge IC for USB to UART data communication. The application program carries the name “Holtek USB Bridge Program”. The application program function contains two blocks, the first block is for the customer vendor ID, product ID and product information upgrate, the second block is for the USB to UART application settings. The USB to UART setting block can be used to configure the baud rate, data, stop bits, parity, flow control and data transmit/ receive demo. For data transfer, the UART function utilises a nonreturn-to-zero, more commonly known as NRZ, format. This is composed of one start bit, eight data bits and one or two stop bits. Parity is supported by the UART hardware and can be setup to be even, odd or no parity. For the most common data format, 8 data bits along with no parity and one stop bit, denoted as 8, N, 1, is used as the default setting, which is the setting at power-on. The main figure for the program update is as follows: The following diagram shows the transmit and receive waveforms for an 8-bit data format. Next Parity Bit Start Start Stop Bit Bit Bit 0 Bit 1 Bit 2 Bit 3 Bit 4 Bit 5 Bit 6 Bit 7 Bit 8-bit Data Format Baud Rate Generator To setup the speed of the serial data communication, the UART function contains its own dedicated baud rate generator. The default UART baud rate is 9600bps and it can be controlled by the application program. The baud rate and miss rate table: Baud Rate Real Rate Miss Rate (%) 2400 2403.846154 0.16 4800 4807.692308 0.16 9600 9603.841537 0.04 19200 19207.68307 0.04 38400 38461.53846 0.16 57600 57692.30769 0.16 115200 115384.6154 0.16 230400 230769.2308 0.16 460800 457142.8571 0.79 1700000 1714285.714 0.84 2300000 2285714.286 0.62 3400000 3428571.429 0.84 Rev. 1.00 7 December 09, 2016 HT42B534-x Program Update Block • Step5: Import user memory (user optional). • Step6: Save or open user memory data (user optional). On the program update block page, first open the Holtek VID/PID Bridge IC. If the USB has been plugged into the host PC, a new window will pop up showing USB open success. The user can update the customer VID, PID, manufacturer name, product description, serial number and 256 bytes of user memory as well as set the UART bridge device hardware flow control and remote wake-up functions. A user memory area, where no special data has been stored, can be used by the user for self-definition. • Step7: Download or upload VID/PID/Product strings and the user memory data. USB to UART Block The USB to UART setting block is used to configure the baud rate, data, stop bits, parity, flow control and data transmit/receive demo. This page can also control the output RTS and DTR toggle pins, CTS, RI, DSR and DCD pins input status. The following table shows the configuration descriptor length. Parameter The figure for the USB to UART is as follows: Length USB Vendor ID(VID) 1 Word (hex) USB Product ID(PID) 1 Word (hex) Manufacturer Name Max. support 16 characters Product Description Max. support 32 characters Serial Number Max. support 4 words The main figure of the program update block is as follows: USB to UART Bridge operating steps: • Step1: Select USB to UART page. • Step2: Check that device is HT42B534-x. • Setp3: Select COM port number. • Step4: Select baud rate. • Step5: Select one or two stop bits. • Step6: Select parity. • Step7: Select flow control function. Configuration operating steps: • Step8: Open the selections. • Step1: Open the Holtek Bridge VID/PID device. • Step9: Input the data to be transmitted. • Step2: Change custom device or go to USB to UART page. • Step10: Send data. • Step11: Receive data. • Setp3: Input VID/PID and product strings (If the user needs to change custom device). • Step12: Toggle RTS/ DTR pins. • Step13: Input CTS/RI/DSR/DCD pins status. • Step4: Hardware flow control and remote wakeup setting. Rev. 1.00 8 December 09, 2016 HT42B534-x Application Circuits Rev. 1.00 9 December 09, 2016 HT42B534-x Dual Power Product Application Circuits VCC VDD 1N5817 3.3V 5V or 3.3V 10µF 0.1µF 0.1µF Battery 3.3V VDDIO VDD 0.1µF GND VDD USB Connector VBUS DD+ VSS 33Ω 33Ω MCU Application Circuit UDET 47pF 47pF 330Ω DD+ LED LED V33O TX 1µF RX UART RX TX HT42B534-x 10SOP Note: 1. Design note: 10-SOP package only for two power application, the VCC power must be below VDD power. (The VCC power can be from the Li-battery). 2. The UDET pin can used for detect the USB plug-in for transfer data, detect the USB plug-out for entry energy saving mode. Rev. 1.00 10 December 09, 2016 HT42B534-x Package Information Note that the package information provided here is for consultation purposes only. As this information may be updated at regular intervals users are reminded to consult the Holtek website for the latest version of the Package/ Carton Information. Additional supplementary information with regard to packaging is listed below. Click on the relevant section to be transferred to the relevant website page. • Package Information (include Outline Dimensions, Product Tape and Reel Specifications) • The Operation Instruction of Packing Materials • Carton information Rev. 1.00 11 December 09, 2016 HT42B534-x 8-pin SOP (150mil) Outline Dimensions              Symbol Dimensions in inch Min. Nom. Max. — 0.236 BSC — B — 0.154 BSC — C 0.012 — 0.020 C′ — 0.193 BSC — D — — 0.069 E — 0.050 BSC — F 0.004 — 0.010 A G 0.016 — 0.050 H 0.004 — 0.010 α 0° — 8° Symbol Rev. 1.00   Dimensions in mm Min. Nom. Max. A — 6.00 BSC — B — 3.90 BSC — C 0.31 — 0.51 C′ — 4.90 BSC — D — — 1.75 E — 1.27 BSC — F 0.10 — 0.25 G 0.40 — 1.27 H 0.10 — 0.25 α 0° — 8° 12 December 09, 2016 HT42B534-x 10-pin SOP (150mil) Outline Dimensions               Symbol Dimensions in inch Min. Nom. Max. A — 0.236 BSC — B — 0.154 BSC — C 0.012 — 0.018 C′ — 0.193 BSC — 0.069 D — — E — 0.039 BSC — F 0.004 — 0.010 G 0.016 — 0.050 H 0.004 — 0.010 α 0° — 8° Symbol Rev. 1.00   Dimensions in mm Min. Nom. Max. A —F 6.00 BSC — B — 3.90 BSC — C 0.30 — 0.45 C′ — 4.90 BSC — D — — 1.75 E — 1.00 BSC — F 0.10 — 0.25 G 0.40 — 1.27 H 0.10 — 0.25 α 0° — 8° 13 December 09, 2016 HT42B534-x 10-pin MSOP Outline Dimensions                                  Symbol Nom. Max. A — — 0.043 A1 0.000 — 0.006 A2 0.030 0.033 0.037 B 0.007 — 0.013 C 0.003 — 0.009 D — 0.118 BSC — E — 0.193 BSC — E1 — 0.118 BSC — e — 0.020 BSC — L 0.016 0.024 0.031 L1 — 0.037 BSC — y — 0.004 — θ 0° — 8° Symbol Rev. 1.00 Dimensions in inch Min. Dimensions in mm Min. Nom. Max. A — — 1.10 A1 0.00 — 0.15 A2 0.75 0.85 0.95 B 0.17 — 0.33 C 0.08 — 0.23 D — 3.00 BSC — E — 4.90 BSC — E1 — 3.00 BSC — e — 0.50 BSC — L 0.40 0.60 0.80 L1 — 0.95 BSC — y — 0.10 — θ 0° — 8° 14 December 09, 2016 HT42B534-x 16-pin NSOP (150mil) Outline Dimensions              Symbol A Dimensions in inch Min. Nom. Max. — 0.236 BSC — B — 0.154 BSC — C 0.012 — 0.020 C’ — 0.390 BSC — D — — 0.069 E — 0.050 BSC — F 0.004 — 0.010 G 0.016 — 0.050 H 0.004 — 0.010 α 0° — 8° Symbol Rev. 1.00    Dimensions in mm Min. Nom. Max. A — 6.0 BSC — B — 3.9 BSC — C 0.31 — 0.51 C’ — 9.9 BSC — D — — 1.75 E — 1.27 BSC — F 0.10 — 0.25 G 0.40 — 1.27 H 0.10 — 0.25 α 0° — 8° 15 December 09, 2016 HT42B534-x Copyright© 2016 by HOLTEK SEMICONDUCTOR INC. The information appearing in this Data Sheet is believed to be accurate at the time of publication. However, Holtek assumes no responsibility arising from the use of the specifications described. The applications mentioned herein are used solely for the purpose of illustration and Holtek makes no warranty or representation that such applications will be suitable without further modification, nor recommends the use of its products for application that may present a risk to human life due to malfunction or otherwise. Holtek's products are not authorized for use as critical components in life support devices or systems. Holtek reserves the right to alter its products without prior notification. For the most up-to-date information, please visit our web site at http://www.holtek.com/en/. Rev. 1.00 16 December 09, 2016