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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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H8S2245 датащи(PDF) 179 Page - Renesas Technology Corp |
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H8S2245 датащи(HTML) 179 Page - Renesas Technology Corp |
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179 / 818 page  Section 6 Bus Controller Rev.3.00 Mar. 26, 2007 Page 137 of 772 REJ09B0355-0300 6.2.3 Wait Control Registers H and L (WCRH, WCRL) WCRH and WCRL are 8-bit readable/writable registers that select the number of program wait states for each area. In normal mode, only part of area is 0 is enabled, and bits W01 and W00 select the number of program wait states for the external space. The settings of bits W71, W70 to W11, and W10 have no effect on operation. Program waits are not inserted in the case of on-chip memory or internal I/O registers. WCRH and WCRL are initialized to H'FF by a power-on reset and in hardware standby mode. They are not initialized by a manual reset or in software standby mode. (1) WCRH 7 W71 1 R/W 6 W70 1 R/W 5 W61 1 R/W 4 W60 1 R/W 3 W51 1 R/W 0 W40 1 R/W 2 W50 1 R/W 1 W41 1 R/W Bit Initial value R/W : : : Bits 7 and 6—Area 7 Wait Control 1 and 0 (W71, W70): These bits select the number of program wait states when area 7 in external space is accessed while the AST7 bit in ASTCR is set to 1. Bit 7 Bit 6 W71 W70 Description 0 0 Program wait not inserted when external space area 7 is accessed 1 1 program wait state inserted when external space area 7 is accessed 1 0 2 program wait states inserted when external space area 7 is accessed 1 3 program wait states inserted when external space area 7 is accessed (Initial value) |
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