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DLPC3439CZEZ Datasheet(PDF) 9 Page - Texas Instruments |
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DLPC3439CZEZ Datasheet(HTML) 9 Page - Texas Instruments |
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9 / 63 page  9 DLPC3439 www.ti.com DLPS057B – NOVEMBER 2014 – REVISED JANUARY 2016 Product Folder Links: DLPC3439 Submit Documentation Feedback Copyright © 2014–2016, Texas Instruments Incorporated (1) External pullup resistor must be 8 k Ω or less. (2) For more information about usage, see HOST_IRQ Usage Model. Pin Functions – Peripheral Interface(1) PIN I/O DESCRIPTION NAME NUMBER CMP_OUT A12 I6 Successive approximation ADC comparator output (DLPC3439 Input). Assumes a successive approximation ADC is implemented with a WPC light sensor and/or a thermistor feeding one input of an external comparator and the other side of the comparator is driven from the ASIC’s CMP_PWM pin. Should be pulled-down to ground if this function is not used. (hysteresis buffer) CMP_PWM A15 O1 Successive approximation comparator pulse-duration modulation (output). Supplies a PWM signal to drive the successive approximation ADC comparator used in WPC light-to-voltage sensor applications. Should be left unconnected if this function is not used. HOST_IRQ(2) N8 O9 Host interrupt (output) This signal has two primary uses. The first use is to indicate when DLPC3439 auto-initialization is in progress and most importantly when it completes. The second is to indicate when service is requested (that is an interrupt request). The DLPC3439 tri-states this output during reset and assumes that an external pullup is in place to drive this signal to its inactive state. IIC0_SCL N10 B7 I2C slave (port 0) SCL (bidirectional, open-drain signal with input hysteresis): An external pullup is required. The slave I2C I/Os are 3.6-V tolerant (high-volt-input tolerant) and are powered by VCC_INTF (which can be 1.8, 2.5, or 3.3 V). External I2C pullups must be connected to an equal or higher supply voltage, up to a maximum of 3.6 V (a lower pullup supply voltage would not likely satisfy the VIH specification of the slave I2C input buffers). IIC1_SCL R11 B8 I2C master (Port 1) SCL. (bidirectional, open-drain signal with input hysteresis): An external pull-up is required. The Master I2C I/Os are 3.6-V tolerant (High-volt-input tolerant) but are powered by the fixed 1.8V VCC18 supply. Thus even though its supply is fixed at 1.8V, the external I2C pull-ups can be connected to 1.8-V, 2.5-V, or 3.3-V supplies; However this is only valid if the external Slave I2C device satisfies the DLPC3439 VIH input requirement at the fixed 1.8-V level. VIH is specified at 1.17 V, thus assuming VCC18 = 1.64 V, VIH = 0.486 V. IIC1_SDA R10 B8 I2C Master (Port 1) SDA. (bidirectional, open-drain signal with input hysteresis): An external pull-up is required. The Master I2C I/Os are 3.6V tolerant (High-volt-input tolerant) but are powered by the fixed 1.8-V VCC18 supply. Thus even though its supply is fixed at 1.8 V, the external I2C pull-ups can be connected to 1.8-V, 2.5-V, or 3.3-V supplies; However this is only valid if the external Slave I2C device satisfies the DLPC3439 VIH input requirement at the fixed 1.8-V level. VIH is specified at 1.17 V, thus assuming VCC18 = 1.64 V, VIH = 0.486 V. Reserved R11 B8 TI internal use. TI recommends an external pullup resistor. IIC0_SDA N9 B7 I2C slave (port 0) SDA. (bidirectional, open-drain signal with input hysteresis): An external pullup is required. The slave I2C port is the control port of ASIC. The slave I2C I/Os are 3.6-V tolerant (high-volt- input tolerant) and are powered by VCC_INTF (which can be 1.8, 2.5, or 3.3 V). External I2C pullups must be connected to an equal or higher supply voltage, up to a maximum of 3.6 V (a lower pullup supply voltage would not likely satisfy the VIH specification of the slave I2C input buffers). Reserved R10 B8 TI internal use. TI recommends an external pullup resistor. LED_SEL_0 B15 O1 LED enable select. Controlled by programmable DMD sequence Timing LED_SEL(1:0) 00 01 10 11 Enabled LED DLPA3000/DLPA3005 application None Red Green Blue LED_SEL_1 B14 O1 These signals will be driven low when RESETZ is asserted and the corresponding I/O power is supplied. They will continue to be driven low throughout the auto-initialization process. A weak, external pulldown resistor is still recommended to ensure that the LEDs are disabled when I/O power is not applied. SPI0_CLK A13 O13 Synchronous serial port 0, clock SPI0_CSZ0 A14 O13 SPI port 1, chip select 0 (active low output) TI recommends an external pullup resistor to avoid floating inputs to the external SPI device during ASIC reset assertion. SPI0_CSZ1 C12 O13 SPI port 1, chip select 1 (active low output) TI recommends an external pullup resistor to avoid floating inputs to the external SPI device during ASIC reset assertion. SPI0_DIN B12 I12 Synchronous serial port 0, receive data in SPI0_DOUT B13 O13 Synchronous serial port 0, transmit data out |
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