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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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SC312XDP512F0MPVR датащи(PDF) 802 Page - Freescale Semiconductor, Inc |
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SC312XDP512F0MPVR датащи(HTML) 802 Page - Freescale Semiconductor, Inc |
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802 / 1348 page  Chapter 21 External Bus Interface (S12XEBIV2) MC9S12XDP512 Data Sheet, Rev. 2.21 804 Freescale Semiconductor 21.5.2.1 Example 2a: Emulation Single-Chip Mode This mode is used for emulation systems in which the target application is operating in normal single-chip mode. Figure 21-5 shows the PRU connection with the available external bus signals in an emulator application. Figure 21-5. Application in Emulation Single-Chip Mode The timing diagram for this operation is shown in: • Figure ‘Example 2a: Emulation Single-Chip Mode — Read Followed by Write’ The associated timing numbers are given in: • Table ‘Example 2a: Emulation Single-Chip Mode Timing (EWAITE = 0)’ Timing considerations: • Signals muxed with address lines ADDRx, i.e., IVDx, IQSTATx and ACCx, have the same timing. • LSTRB has the same timing as R/W. • ECLKX2 rising edges have the same timing as ECLK edges. • The timing for accesses to PRU registers, which take 2 cycles to complete, is the same as the timing for an external non-PRR access with 1 cycle of stretch as shown in example 2b. S12X_EBI ADDR[22:0]/IVD[15:0] DATA[15:0] ECLK ECLKX2 LSTRB R/W ADDR[22:20]/ACC[2:0] ADDR[19:16]/ PRR Ports PRU IQSTAT[3:0] EMULMEM Emulator |
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