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M66291HP Datasheet(PDF) 9 Page - Renesas Technology Corp |
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M66291HP Datasheet(HTML) 9 Page - Renesas Technology Corp |
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9 / 126 page  M66291GP/HP Rev 1.01 2004.11.01 page 9 of 122 2 Registers How to Read Register Tables Bit Numbers : Each register is connected with an internal bus of 16-bit wide, so the bit numbers of the registers located at odd addresses are b15-b8, and those at even addresses are b7-b0. State of Register at Reset : Represents the initial state of each register immediately after reset with hexadecimal numbers. The "H/W reset" is the reset by an external reset signal; the "S/W reset" is the reset by the USBE bit of the USB Operation Enable Register. At Read: ... Read enabled ? ... Read disabled (Read value invalid) 0 ... Read always as 0 1 ... Read always as 1 At Write: ... Write enabled ∆ ... Write enable conditionally (includes some conditions at write) — ... Write disabled (Don’t care “0” and “1” at write) X ··· Write disabled <Example of representation> Not implemented in the shaded portion. b15 14 13 12 11 10 987654321 b0 Abit Bbit Cbit H/W reset 0 000 S/W reset 0 000 USB bus reset 0 000 <H/W reset : H'0000> <S/W reset : -> <USB bus reset : -> b Bit name Function R W 15 Reserved. 0 - 14 A bit (------------------------) 0: ------------------------ 1: ------------------------ 00 13 B bit (------------------------) 0: ------------------------ 1: ------------------------ 00 12 C bit (------------------------) 0: ------------------------ 1: ------------------------ 00 |
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