PIC18F2553-I/SP High Performance Enhanced Flash USB Microcontrollers inside ic chip

PIC18F2553-I/SP High-Performance, Enhanced Flash, USB Microcontrollers inside ic chip

Universal Serial Bus Features:

► USB V2.0 Compliant

► Low Speed (1.5 Mb/s) and Full Speed (12 Mb/s)

► Supports Control, Interrupt, Isochronous and Bulk Transfers

► Supports up to 32 Endpoints (16 bidirectional)

► 1-Kbyte Dual Access RAM for USB

► On-Chip USB Transceiver with On-Chip Voltage Regulator

► Interface for Off-Chip USB Transceiver

► Streaming Parallel Port (SPP) for USB Streaming Transfers (40/44-pin devices only)

A/D Conversions Figure 2-4 shows the operation of the A/D Converter after the GO/DONE bit has been set and the ACQT2:ACQT0 bits are cleared. A conversion is started after the following instruction to allow entry into Sleep mode before the conversion begins.

Figure 2-5 shows the operation of the A/D Converter after the GO/DONE bit has been set and the ACQT2:ACQT0 bits are set to ë010í, and selecting a 4 TAD acquisition time before the conversion starts. Clearing the GO/DONE bit during a conversion will abort the current conversion. The A/D Result register pair will NOT be updated with the partially completed A/D conversion sample. This means the ADRESH:ADRESL registers will continue to contain the value of the last completed conversion (or the last value written to the ADRESH:ADRESL registers).

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