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AT43USB351M-AC Datasheet(PDF) 78 Page - ATMEL Corporation |
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AT43USB351M-AC Datasheet(HTML) 78 Page - ATMEL Corporation |
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78 / 101 page  78 AT43USB351M 3302E–USB–7/04 USB Registers The following sections describe the registers of the AT43USB351M’s function unit. Reading a bit for which the microcontroller does not have read access will yield a zero value result. Writing to a bit for which the microcontroller does not have write access has no effect. Hub Address Register – HADDR This register is an artifact of the AT43USB355. It is included in the AT43USB351M to make the two devices binary-compatible. In the AT43USB351M only bit 7 is meaningful. Hub Address Register – HADDR • Bit 7 – SAEN: Single Address Enable In the AT43USB351M, this bit should be set to “1”. • Bit 6..0 – HADD6...0: Hub Address[6:0] These bits are don’t cares in the AT43USB351M. Bit 7 6 5 4 3 2 1 0 $1FEF SAEN HADD6 HADD5 HADD4 HADD3 HADD2 HADD1 HADD0 HADDR Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Initial Value 0 0 0 0 0 0 0 0 |
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