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Z86C34 Datasheet(PDF) 32 Page - Zilog, Inc. |
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Z86C34 Datasheet(HTML) 32 Page - Zilog, Inc. |
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32 / 70 page ![]() Z86C34/C35/C36/C44/C45/C46 CMOS Z8® MCUs with ASCI UART ZiLOG 32 P R E L I M I N A R Y DS007601-Z8X0499 FUNCTIONAL DESCRIPTION (Continued) continuous locations. The Register Pointer addresses the starting location of the active working register group. Figure 20. Register Pointer D7 D6 D5 D4 D3 D2 D1 D0 Expanded Register Group Working Register Group RP R253 Default setting after RESET = 00000000 Figure 21. Register Pointer—Detail The upper nibble of the register file address provided by the register pointer specifies the active working-register group. r7 r6 r5 r4 R253 (Register Pointer) I/O Ports Specified Working Register Group The lower nibble of the register file address provided by the instruction points to the specified register r3 r2 r1 r0 Register Group 1 Register Group 0 R15 to R0 Register Group F R15 to R4 R3 to R0 R15 to R0 FF F0 0F 00 1F 10 2F 20 3F 30 4F 40 5F 50 6F 60 7F 70 |
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