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HD64F2145 Datasheet(PDF) 104 Page - Renesas Technology Corp |
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HD64F2145 Datasheet(HTML) 104 Page - Renesas Technology Corp |
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104 / 829 page  Rev. 2.0, 08/02, page 64 of 788 3.2.1 Mode Control Register (MDCR) MDCR is used to set an operating mode and to monitor the current operating mode. Bit Bit Name Initial Value R/W Description 7 EXPE —* R/W* Extended Mode Enable Specifies extended mode. Fixed to 1 and cannot be modified in mode 1. Readable/writable and the initial value is 0 in mode 2 or 3. 0: Single-chip mode 1: Extended mode 6 to 2 — All 0 R Reserved These bits are always read as 0. These bits cannot be modified. 1 0 MDS1 MDS0 —* —* R R Mode Select 1 and 0 These bits indicate the input levels at mode pins (MD1 and MD0) (the current operating mode). Bits MDS1 and MDS0 correspond to MD1 and MD0, respectively. These bits are read-only bits and they cannot be written to. The mode pin (MD1 and MD0) input levels are latched into these bits when MDCR is read. These latches are canceled by a reset. Note:* The initial values are determined by the settings of the MD1 and MD0 pins. |
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