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CAP1028 Scheda tecnica(PDF) 9 Page - SMSC Corporation |
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CAP1028 Scheda tecnica(HTML) 9 Page - SMSC Corporation |
9 / 71 page 8 Channel Capacitive Touch Sensor with 2 LED Drivers Datasheet SMSC CAP1028 9 Revision 1.1 (08-05-09) DATASHEET The pin types are described in detail below. All pins labeled with (5V) are 5V tolerant. 3 SMDATA / BC_DATA / SPI_MSIO / SPI_MISO SMDATA - Bi-directional, open-drain SMBus data - requires pull-up resistor DIOD (5V) BC_DATA - Bi-directional, open-drain BC-Link data - requires pull-up resistor DIO SPI_MSIO - SPI Master-Slave-In-Out bidirectional port when used in bi-directional mode DIO SPI_MISO - SPI Master-In-Slave-Out port when used in normal mode DO 4 SMCLK / BC_CLK / SPI_CLK SMCLK - SMBus clock input - requires pull-up resistor DI (5V) BC_CLK - BC-Link clock input DI (5V) SPI_CLK - SPI clock input DI (5V) 5 N/C Not Internally Connected n/a 6LED1 Open drain LED 1 driver (default) OD (5V) Push-pull LED 1 driver DO 7LED2 Open drain LED 2 driver (default) OD (5V) Push-pull LED 2 driver DO 8 N/C Not Internally Connected n/a 9 RESET Active high soft reset for system - resets all registers to default values. This pin contains an internal 50uA pull-down current. DI (5V) 10 ALERT# / BC_IRQ# ALERT# - Active low alert / interrupt output usable for SMBus alert or SPI interrupt OD (5V) BC_IRQ# - Active low interrupt / optional for BC-Link OD (5V) 11 ADDR_COMM Address / communications select pin - pull-down resistor determines address / communications mechanism AI 12 CS8 Capacitive Touch Sensor 8 AIO 13 CS7 Capacitive Touch Sensor 7 AIO 14 CS6 Capacitive Touch Sensor 6 AIO 15 CS5 Capacitive Touch Sensor 5 AIO 16 CS4 Capacitive Touch Sensor 4 AIO 17 CS3 Capacitive Touch Sensor 3 AIO 18 CS2 Capacitive Touch Sensor 2 AIO 19 CS1 Capacitive Touch Sensor 1 AIO 20 VDD Positive Power supply Power Bottom Pad GND Ground Power Table 1.1 Pin Description for CAP1028 (continued) PIN NUMBER PIN NAME PIN FUNCTION PIN TYPE |
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