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USB7002 数据表(PDF) 17 Page - Microchip Technology |
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USB7002 数据表(HTML) 17 Page - Microchip Technology |
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17 / 56 page ![]() 2018-2019 Microchip Technology Inc. DS00002670C-page 17 USB7002 3.3.3 BATTERY CHARGING CONFIGURATION (CFG_BC_EN) The CFG_BC_EN configuration strap is used to configure the battery charging port settings of the device to one of five settings. These modes are selected by the configuration of an external resistor on the CFG_BC_EN pin. The resistor options are a 200 kΩ pull-down, 200 kΩ pull-up, 10 kΩ pull-down, 10 kΩ pull-up, and 10 Ω pull-down, as shown in Table 3-3. 3.3.4 PF[31:4] CONFIGURATION (CFG_STRAP[2:1]) The USB7002 provides 28 programmable function pins (PF[31:4]). These pins can be configured to 4 predefined con- figurations via the CFG_STRAP[2:1] pins. These configurations are selected via external resistors on the CFG_STRAP[2:1] pins, as detailed in Table 3-4. Resistor values and combinations not detailed in Table 3-4 are reserved and should not be used. TABLE 3-3: CFG_BC_EN RESISTOR ENCODING CFG_BC_EN Resistor Value Setting 200 kΩ Pull-Down Battery charging not enable on any port 200 kΩ Pull-Up BC1.2 DCP and CDP battery charging enabled on Port 1 10 kΩ Pull-Down BC1.2 DCP and CDP battery charging enabled on Ports 1, 2 10 kΩ Pull-Up BC1.2 DCP and CDP battery charging enabled on Ports 1, 2, 3 10 Ω Pull-Down BC1.2 DCP and CDP battery charging enabled on Ports 1, 2, 3, 4 Note: CFG_STRAP3 is not used and can be left unconnected. TABLE 3-4: CFG_STRAP[2:1] RESISTOR ENCODING Mode CFG_STRAP2 Resistor Value CFG_STRAP1 Resistor Value Configuration 1 200 kΩ Pull-Down 200 kΩ Pull-Down Configuration 2 200 kΩ Pull-Down 200 kΩ Pull-Up Configuration 3 200 kΩ Pull-Down 10 kΩ Pull-Down Configuration 4 200 kΩ Pull-Down 10 kΩ Pull-Up |
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