idVendor: 0x072F iManufacturer: ACS idProduct: 0x2303 iProduct: ACR1552 bcdDevice: 1.00 (firmware release?) bLength: 9 bDescriptorType: 4 bInterfaceNumber: 0 bAlternateSetting: 0 bNumEndpoints: 3 bulk-IN, bulk-OUT and Interrupt-IN bInterfaceClass: 0x0B [Chip Card Interface Device Class (CCID)] bInterfaceSubClass: 0 bInterfaceProtocol: 0 bulk transfer, optional interrupt-IN (CCID) iInterface: ACR1552 1S CL Reader PICC CCID Class Descriptor bLength: 0x36 bDescriptorType: 0x21 bcdCCID: 1.10 bMaxSlotIndex: 0x00 bVoltageSupport: 0x07 5.0V 3.0V 1.8V dwProtocols: 0x0000 0x0003 T=0 T=1 dwDefaultClock: 5.000 MHz dwMaximumClock: 13.560 MHz bNumClockSupported: 0 (will use whatever is returned) IFD does not support GET CLOCK FREQUENCIES request: LIBUSB_ERROR_PIPE dwDataRate: 105938 bps dwMaxDataRate: 847500 bps bNumDataRatesSupported: 0 (will use whatever is returned) IFD does not support GET_DATA_RATES request: LIBUSB_ERROR_PIPE dwMaxIFSD: 506 dwSynchProtocols: 0x00000000 dwMechanical: 0x00000000 No special characteristics dwFeatures: 0x000404BA ....02 Automatic parameter configuration based on ATR data ....08 Automatic ICC voltage selection ....10 Automatic ICC clock frequency change according to parameters ....20 Automatic baud rate change according to frequency and Fi, Di params ....80 Automatic PPS made by the CCID ..04.. Automatic IFSD exchange as first exchange (T=1) 04.... Short and Extended APDU level exchange dwMaxCCIDMessageLength: 516 bytes bClassGetResponse: 0xFF echoes the APDU class bClassEnvelope: 0xFF echoes the APDU class wLcdLayout: 0x0000 bPINSupport: 0x00 bMaxCCIDBusySlots: 1 idVendor: 0x072F iManufacturer: ACS idProduct: 0x2303 iProduct: ACR1552 bcdDevice: 1.00 (firmware release?) bLength: 9 bDescriptorType: 4 bInterfaceNumber: 1 bAlternateSetting: 0 bNumEndpoints: 2 bulk-IN and bulk-OUT bInterfaceClass: 0x0B [Chip Card Interface Device Class (CCID)] bInterfaceSubClass: 0 bInterfaceProtocol: 0 bulk transfer, optional interrupt-IN (CCID) iInterface: ACR1552 1S CL Reader SAM CCID Class Descriptor bLength: 0x36 bDescriptorType: 0x21 bcdCCID: 1.10 bMaxSlotIndex: 0x00 bVoltageSupport: 0x01 5.0V dwProtocols: 0x0000 0x0003 T=0 T=1 dwDefaultClock: 5.000 MHz dwMaximumClock: 5.000 MHz bNumClockSupported: 0 (will use whatever is returned) IFD does not support GET CLOCK FREQUENCIES request: LIBUSB_ERROR_PIPE dwDataRate: 13441 bps dwMaxDataRate: 625000 bps bNumDataRatesSupported: 0 (will use whatever is returned) IFD does not support GET_DATA_RATES request: LIBUSB_ERROR_PIPE dwMaxIFSD: 506 dwSynchProtocols: 0x00000000 dwMechanical: 0x00000000 No special characteristics dwFeatures: 0x000404BA ....02 Automatic parameter configuration based on ATR data ....08 Automatic ICC voltage selection ....10 Automatic ICC clock frequency change according to parameters ....20 Automatic baud rate change according to frequency and Fi, Di params ....80 Automatic PPS made by the CCID ..04.. Automatic IFSD exchange as first exchange (T=1) 04.... Short and Extended APDU level exchange dwMaxCCIDMessageLength: 516 bytes bClassGetResponse: 0xFF echoes the APDU class bClassEnvelope: 0xFF echoes the APDU class wLcdLayout: 0x0000 bPINSupport: 0x00 bMaxCCIDBusySlots: 1