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H8/3021 Datasheet(PDF) 465 Page - Renesas Technology Corp |
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H8/3021 Datasheet(HTML) 465 Page - Renesas Technology Corp |
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465 / 712 page  14. RAM Rev.2.00 Mar. 22, 2007 Page 441 of 684 REJ09B0352-0200 Section 14 RAM 14.1 Overview The H8/3022 has 8 kbytes of on-chip static RAM, H8/3021 has 8 kbytes, and H8/3020 has 4kbytes. The RAM is connected to the CPU by a 16-bit data bus. The CPU accesses both byte data and word data in two states, making the RAM suitable for rapid data transfer. The RAM enable bit (RAME) in the system control register (SYSCR) can enable or disable the on-chip RAM. Table 14.1 shows the address of the on-chip RAM in each operating mode. Table 14.1 The Address of the On-Chip RAM in Each Operating Mode Mode H8/3022 (8 kbytes) H8/3021 (8 kbytes) H8/3020 (4k byte) Modes 1, 5, 6, 7 H'FDF10 to H'FFF0F H'FDF10 to H'FFF0F H'FEF10 to H'FFF0F Mode 3 H'FFDF10 to H'FFFF0F H'FFDF10 to H'FFFF0F H'FFEF10 to H'FFFF0F |
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