Related Manuals for Philips PTN3501
Summary of Contents for Philips PTN3501
- Page 1 PTN3501 Maintenance and control device Product specification Supersedes data of 2000 Nov 22 hilips Semiconductors INTEGRATED CIRCUITS 2001 Jan 17...
- Page 2 LEDs. The PTN3501 has six address pins allowing up to 64 devices to share the common two wire I C software protocol serial data bus.
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Page 3: Characteristics Of The I 2 C-Bus
Philips Semiconductors Maintenance and control device CHARACTERISTICS OF THE I C-BUS The I C-bus is for 2-way, 2-line communication between different ICs or modules. The two lines are a serial data line (SDA) and a serial clock line (SCL). Both lines must be connected to a positive supply via a pull-up resistor when connected to the output stages of a device. -
Page 4: Functional Description
Philips Semiconductors Maintenance and control device Acknowledge (see Figure 6) The number of data bytes transferred between the start and the stop conditions from transmitter to receiver is not limited. Each byte of eight bits is followed by one acknowledge bit. The acknowledge bit is a HIGH level put on the bus by the transmitter whereas the master generates an extra acknowledge related clock pulse. - Page 5 I/O OPERATIONS (see also Figure 7) Each of the PTN3501’s eight I/Os can be independently used as an input or output. Input I/O data is transferred from the port to the microcontroller by the READ mode (See Figure 10). Output data is transmitted to the port by the I/O WRITE mode (see Figure 9).
- Page 6 Maintenance and control device Interrupt (see Figs 11 and 12) The PTN3501 provides an open drain output (INT) which can be fed to a corresponding input of the microcontroller. This gives these chips a type of master function which can initiate an action elsewhere in the system.
- Page 7 An additional strong pull-up to V These devices turn on when an output is written HIGH, and are switched off by the negative edge of SCL. The I/Os should be HIGH before being used as inputs. SLAVE ADDRESS (PTN3501) A2 A1 START CONDITION...
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Page 8: Memory Operations
Byte Write (see Figure 14) To perform a byte write the start condition is followed by the memory slave address and the R/W bit set to 0. The PTN3501 will respond with an acknowledge and then consider the next eight bits sent as the word address and the eight bits after the word address as the data. -
Page 9: Read Operations
Random Read (see Figure 17) The PTN3501’s random read mode allows the address to be read from to be specified by the master. This is done by performing a dummy write to set the address counter to the location to be read. -
Page 10: Absolute Maximum Ratings
Philips Semiconductors Maintenance and control device ABSOLUTE MAXIMUM RATINGS Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied. SYMBOL Supply Voltage Input Voltage DC Input Current DC Output Current... - Page 11 Philips Semiconductors Maintenance and control device C-BUS TIMING CHARACTERISTICS SYMBOL PARAMETER C-bus timing (see Figure 19; Note 1) SCL clock frequency tolerable spike width on bus bus free time START condition set–up time SU;STA START condition hold time HD;STA SCL and SDA rise time SCL and SDA fall time data set–up time...
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Page 12: Power-Up Timing
Philips Semiconductors Maintenance and control device POWER-UP TIMING SYMBOL NOTE: 1. t and t are the delays required from the time V guaranteed by design. WRITE CYCLE LIMITS SYMBOL PARAMETER Write Cycle Time NOTE: 1. t is the maximum time that the device requires to perform the internal write operation. - Page 13 C COMPONENTS Purchase of Philips I to use the components in the I C specifications defined by Philips. This specification can be ordered using the code 9398 393 40011. 2001 Jan 17 seconds depending on heating method. Typical reflow temperatures range from 215 to 250 C.
- Page 14 Philips Semiconductors Product specification Maintenance and control device PTN3501 TSSOP20: plastic thin shrink small outline package; 20 leads; body width 4.4 mm SOT360-1 2001 Jan 17...
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Page 15: Data Sheet Status
Life support — These products are not designed for use in life support appliances, devices or systems where malfunction of these products can reasonably be expected to result in personal injury. Philips Semiconductors customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting from such application.