AN3829 Rev. 1.0, 2/2009 Freescale Semiconductor Application Note Recommendation for NC Pins (Devices: 33912G5, 33911G5 & 33910G5) 1 Purpose The application note purpose is to specify the connection of the “not connected” (NC) pins for the SBCLIN2.5G devices family which is composed of three devices: • 33912G5: SBCLIN with DC Motor Pre Driver and Current Sense • 33911G5: SBCLIN with DC Motor Pre Driver • 33910G5: SBCLIN with High Side Driver In this document, the developer can find for each three devices the voltage level connection for the pins labelled “nc” in the Data Sheet. A typical application schematic will be also described. The transgression of the “nc” pins connections especially for the 33911G5 and 33910G5 devices could generate a device failure. © Freescale Semiconductor, Inc. 2009. All rights reserved. Contents 1 2 3 4 Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33912G5 Device . . . . . . . . . . . . . . . . . . . . . . . 33911G5 Device . . . . . . . . . . . . . . . . . . . . . . . 33910G5 Device . . . . . . . . . . . . . . . . . . . . . . . 1 2 5 7 33912G5 Device 2 33912G5 Device 2.1 Pins Connections NC VS1 VS2 HS1 28 27 26 25 HVDD VSENSE 29 VDD 31 30 AGND 32 The 33912G5 device is packaged in a LQFP-32 pins. Figure 1 illustrates the pin connections. L2 21 L3 SCLK 5 20 L4 CS 6 19 LS1 ADOUT0 7 18 PGND PWMIN 8 17 LS2 9 10 11 12 13 14 15 16 ISENSEL 22 4 ISENSEH 3 MOSI LIN MISO LGND L1 WDCONF HS2 23 IRQ 24 2 ADOUT1 1 TXD RST RXD Figure 1. 33912G5 pin connections The table below shows the pins functions. Pin Pin Name Formal Name Definition 1 RXD Receiver Output This pin is the receiver output of the LIN interface which reports the state of the bus voltage to the MCU interface. 2 TXD Transmitter Input This pin is the transmitter input of the LIN interface which controls the state of the bus output. 3 MISO SPI Output SPI (Serial Peripheral Interface) data output. When CS is high, pin is in the high-impedance state. 4 MOSI SPI Input SPI (Serial Peripheral Interface) data input. 5 SCLK SPI Clock SPI (Serial Peripheral Interface) clock Input. 6 CS SPI Chip Select 7 ADOUT0 Analog Output Pin 0 8 PWMIN PWM Input 9 RST Internal Reset I/O Bidirectional Reset I/O pin - driven low when any internal reset source is asserted. RST is active low. 10 IRQ Internal Interrupt Output Interrupt output pin, indicating wake-up events from Stop Mode or events from Normal and Normal request modes. IRQ is active low. 11 ADOUT1 Analog Output Pin 1 12 WDCONF Watchdog Configuration Pin 13 LIN LIN Bus SPI (Serial Peripheral Interface) chip select input pin. CS is active low. Analog Multiplexer Output. High Side and Low Side Pulse Width Modulation Input. Current sense analog output. This input pin is for configuration of the watchdog period and allows the disabling of the watchdog. This pin represents the single-wire bus transmitter and receiver. PC900840 Layout Guidelines Freescale Semiconductor 2 33912G5 Device Pin Pin Name Formal Name Definition 14 LGND LIN Ground Pin This pin is the device LIN ground connection. It is internally connected to the PGND pin. 15 ISENSEL 16 ISENSEH 17 LS2 19 LS1 18 PGND 20 L4 21 L3 22 L2 23 L1 24 HS2 25 HS1 26 VS2 27 VS1 29 Current Sense Pins Current Sense differential inputs. Low Side Outputs Relay drivers low side outputs. Power Ground Pin This pin is the device low side ground connection. It is internally connected to the LGND pin. Wake-up Inputs These pins are the wake-up capable digital inputs<st-blue><superscript>(1). In addition, all Lx inputs can be sensed analog via the analog multiplexer. High Side Outputs High side switch outputs. Power Supply Pin These pins are device battery level power supply pins. VS2 is supplying the HSx drivers while VS1 supplies the remaining blocks.<st-blue><superscript>(2) VSENSE Voltage Sense Pin Battery voltage sense input.<st-blue><superscript>(3) 30 HVDD Hall Sensor Supply Output +5.0 V switchable supply output pin.<st-blue><superscript>(4) 31 VDD Voltage Regulator Output +5.0 V main voltage regulator output pin.<st-blue><superscript>(5) 32 AGND Analog Ground Pin This pin is the device analog ground connection. Notes 1. When used as digital input, a series 33kΩ resistor must be used to protect against automotive transients. 2. Reverse battery protection series diodes must be used externally to protect the internal circuitry. 3. This pin can be connected directly to the battery line for voltage measurements. The pin is self protected against reverse battery connections. It is strongly recommended to connect a 10kΩ resistor in series with this pin for protection purposes. 4. External capacitor (1.0 µF < C < 10 µF; 0.1 Ω < ESR < 5.0 Ω) required. 5. External capacitor (2.0 µF < C < 100 µF; 0.1 Ω < ESR < 10 Ω) required. 2.2 Recommendation of NC Pin This device presents one “NC” pin which is the pin number 28. This pin is not connected internally and can be left opening/floating or connected to any potential (ground, power supply). PC900840 Layout Guidelines Freescale Semiconductor 3 33912G5 Device 2.3 Typical Application Schematic The Figure 2, page 4 illustrates a typical application schematic. VBAT D1 Hall Sensor Supply C5 C2 C1 R1 C4 C3 A/D RST 28 27 26 25 VS1 VS2 HS1 29 30 NC 31 HVDD VSENSE 32 VDD RXD HS2 24 2 TXD L1 23 R2 3 MISO L2 22 R3 4 MOSI L3 21 R4 Analog Input 5 SCLK L4 20 R5 Analog Input 6 CS LS1 19 PGND 18 ISENSEH ISENSEL PWMIN LGND ADOUT0 8 LIN 7 RST A/D Timer WDCONF 33912G5 ADOUT1 SPI MCU 1 IRQ SCI AGND VDD LS2 HB Type Relay 17 IRQ D2 Master Node Configuration R8 16 15 14 13 12 11 9 10 Motor Output LIN R 7 C6 R6 Typical Component Values: C1 = 47 µF; C2 = C4 = 100 nF; C3 = 10 µF; C5 = 4.7 µF; C6 = 68pF or 0pF R1 = 10 kΩ; R2 = R3 = 10 kΩ; R4 = R5 = 33 kΩ; R6 = 20 Ω; R7 = 20 kΩ-200 kΩ; R8 = 1 kΩ Recommended Configuration of the not Connected Pins (NC): Pin 28 = this pin is not internally connected and may be used for PCB routing optimization. Figure 2. 33912G5 Typical application schematic PC900840 Layout Guidelines Freescale Semiconductor 4 33911G5 Device 3 33911G5 Device 3.1 Pins Connections AGND VDD NC* VSENSE NC VS1 VS2 HS1 32 31 30 29 28 27 26 25 The 33911G5 device is packaged in a LQFP-32 pins. Figure 3 illustrates the pin connections. RXD 1 24 NC* TXD 2 23 L1 MISO 3 22 L2 MOSI 4 21 NC* SCLK 5 20 NC* CS 6 19 LS1 ADOUT0 7 18 PGND PWMIN 8 17 LS2 9 10 11 12 13 14 15 16 RST IRQ NC* WDCONF LIN LGND NC* NC* * See Recommendation below Figure 3. 33911G5 pin connections 3.2 Recommendation of NC Pins The 33911G5 device has eight “nc” pins. The table below describes following each pins number the recommended connections. The user must respect them in order to not damage the device. Table 1. 33911G5 Not Connected Pins Connections Pins Numbers Connections recommendation 11 not connected 15 not connected or connected to the Ground 16 not connected or connected to the Ground 20 not connected or connected to the Ground 21 not connected or connected to the Ground 24 not connected or connected to VS2 28 not connected 30 not connected PC900840 Layout Guidelines Freescale Semiconductor 5 33911G5 Device 3.3 Typical Application Schematic The Figure 4, page 6 illustrates a typical application schematic. VBAT D1 C2 C1 R1 C4 C3 RST 28 27 26 25 VS1 VS2 HS1 29 30 NC 31 NC VSENSE 32 VDD RXD NC 24 2 TXD L1 23 R2 3 MISO L2 22 R3 NC 21 NC 20 LS1 19 PGND 18 LS2 17 7 ADOUT0 Timer 8 PWMIN RST A/D HB Type Relay D2 Master Node Configuration NC CS NC 6 33911G5 LGND SCLK LIN MOSI 5 WDCONF 4 NC SPI MCU 1 IRQ SCI AGND VDD IRQ R8 16 15 14 13 12 11 9 10 Motor Output LIN R 7 C6 Typical Component Values: C1 = 47 µF; C2 = C4 = 100 nF; C3 = 10 µF; C6 = 68pF or 0pF R1 = 10 kΩ; R2 = R3 = 10 kΩ; R7 = 20 kΩ-200 kΩ; R8 = 1 kΩ Figure 4. 33911G5 Typical Application Schematic PC900840 Layout Guidelines Freescale Semiconductor 6 33910G5 Device 4 33910G5 Device 4.1 Pins Connections AGND VDD HVDD VSENSE NC VS1 VS2 HS1 32 31 30 29 28 27 26 25 The 33910G5 device is packaged in a LQFP-32 pins. Figure 5 illustrates the pin connections. RXD 1 24 HS2 TXD 2 23 L1 MISO 3 22 NC* MOSI 4 21 NC* SCLK 5 20 NC* CS 6 19 NC* ADOUT0 7 18 PGND PWMIN 8 17 NC* 9 10 11 12 13 14 15 16 RST IRQ NC* WDCONF LIN LGND NC* NC* * See Recommendation below Figure 5. 33910G5 pin connections 4.2 Recommendation of NC Pins The 33910G5 device has nine “nc” pins. The table below describes following each pins number the recommended connections. The user must respect them in order to not damage the device. Table 2. 33910G5 Not Connected Pins Connections Pins Numbers Connections recommendation 11 not connected 15 not connected or connected to the Ground 16 not connected or connected to the Ground 17 not connected or connected to the Ground 19 not connected or connected to the Ground 20 not connected or connected to the Ground 21 not connected or connected to the Ground 22 not connected or connected to the Ground 28 not connected PC900840 Layout Guidelines Freescale Semiconductor 7 33910G5 Device 4.3 Typical Application Schematic The Figure 6, page 8 illustrates a typical application schematic. VBAT D1 Hall Sensor Supply C5 C2 C1 R1 C4 C3 RST CS 28 27 26 25 VS1 VS2 HS1 24 L1 23 NC 22 NC 21 NC 20 NC 7 ADOUT0 Timer 8 PWMIN RST A/D 19 PGND 18 NC 17 R2 D2 Master Node Configuration NC 6 HS2 33910G5 NC SCLK LGND MOSI 5 LIN 4 29 30 MISO WDCONF 3 NC 31 HVDD TXD VSENSE 32 VDD RXD 2 NC SPI MCU 1 IRQ SCI AGND VDD IRQ R8 16 15 14 13 12 11 9 10 LIN R 7 C6 Typical Component Values: C1 = 47 µF; C2 = C4 = 100 nF; C3 = 10 µF; C5 = 4.7 µF; C6 = 68pF or 0pF R1 = 10 kΩ; R2 = 10 kΩ; R7 = 20 kΩ-200 kΩ; R8 = 1 kΩ Figure 6. 33910G5 Typical Application Schematic PC900840 Layout Guidelines Freescale Semiconductor 8 How to Reach Us: Home Page: www.freescale.com Web Support: http://www.freescale.com/support USA/Europe or Locations Not Listed: Freescale Semiconductor, Inc. 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