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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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UPD17P136ACT датащи(PDF) 86 Page - NEC |
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UPD17P136ACT датащи(HTML) 86 Page - NEC |
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86 / 292 page  CHAPTER 8 GENERAL REGISTER (GR) The general register (GR) is allocated in data memory. It can therefore be used directly for arithmetic operations and transferring data. 8.1 GENERAL REGISTER CONFIGURATION Figure 8-1 shows the configuration of the general register. As shown in Figure 8-1, 16 nibbles in a single row address in data memory (16 × 4 bits) are used as the general register. The register pointer (RP) in the system register is used to indicate which row address is to be used as the general register. Since the general register pointer effectively has four valid bits, the data memory row addresses in which the general register can be allocated are addresses 0H to 7H of BANK0 and BANK1. However, note that row addresses 0H to 6H of BANK1 are unmounted area and should therefore not be specified as locations for the general register. 8.2 FUNCTIONS OF THE GENERAL REGISTER The general register can be used in transferring data to and from data memory and in performing arithmetic operations with data memory within an instruction. In effect, since the general register is data memory, this just means that operations such as arithmetic operations and data transfer can be performed on and between locations in data memory. In addition, because the general register is allocated in data memory, it can be controlled in the same manner as other areas in data memory through the use of data memory manipulation instructions. 67 |
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