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DS80C411-FNY Datasheet(PDF) 5 Page - Dallas Semiconductor |
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DS80C411-FNY Datasheet(HTML) 5 Page - Dallas Semiconductor |
5 / 102 page DS80C410/DS80C411 Network Microcontrollers with Ethernet and CAN 5 of 102 EXTERNAL CLOCK OSCILLATOR (XTAL1) CHARACTERISTICS PARAMETER SYMBOL MIN MAX UNITS Clock Oscillator Period tCLK See External Clock Oscillator Frequency Clock Symmetry at 0.5 x VCC3 tCH 0.45 tCLK 0.55 tCLK ns Clock Rise Time tCR 3 ns Clock Fall Time tCF 3 ns EXTERNAL CLOCK DRIVE SYSTEM CLOCK TIME PERIODS (tCLCL, tCHCL, tCLCH) SYSTEM CLOCK SELECTION SYSTEM CLOCK HIGH (tCHCL ) AND SYSTEM CLOCK LOW (tCLCH) 4X/ 2X CD1 CD0 SYSTEM CLOCK PERIOD tCLCL MIN MAX 1 0 0 tCLK / 4 0.45 (tCLK / 4) 0.55 (tCLK / 4) 0 0 0 tCLK / 2 0.45 (tCLK / 2) 0.55 (tCLK / 2) X 1 0 tCLK 0.45 tCLK 0.55 tCLK X 1 1 256 tCLK 0.45 (256 tCLK) 0.55 (256 tCLK) Note 1: Figure 21 shows a detailed description and illustration of the system clock selection. Note 2: When an external clock oscillator is used in conjunction with the default system clock selection (CD1:CD0 = 10b), the minimum/maximum system clock high (tCHCL) and system clock low (tCLCH) periods are directly related to clock oscillator duty cycle. MOVX CHARACTERISTICS (MULTIPLEXED ADDRESS/DATA BUS) (Note 1) (VCC3 = 3.0V to 3.6V, VCC1 = 1.8V ±10%, TA = -40 °C to +85°C.) PARAMETER SYMBOL MIN MAX UNITS STRETCH VALUES CST (MD2:0) tCLCL + tCHCL - 5 CST = 0 2tCLCL - 5 1 £ CST £ 3 MOVX ALE Pulse Width tLHLL2 6tCLCL - 5 ns 4 £ CST £ 7 tCHCL - 5 CST = 0 tCLCL - 6 1 £ CST £ 3 Port 0 MOVX Address Valid to ALE Low tAVLL2 5tCLCL - 6 ns 4 £ CST £ 7 tCLCH - 2 CST = 0 tCLCL - 2 1 £ CST £3 Port 0 MOVX Address Hold after ALE Low tLLAX2 and tLLAX3 5tCLCL - 2 ns 4 £ CST £ 7 2tCLCL - 5 CST = 0 RD Pulse Width (P3.7 or PSEN) tRLRH (4 x CST) tCLCL - 3 ns 1 £ CST £ 7 2tCLCL - 5 CST = 0 WR Pulse Width (P3.6) tWLWH (4 x CST) tCLCL - 3 ns 1 £ CST £ 7 2tCLCL - 18 CST = 0 RD (P3.7 or PSEN) Low to Valid Data In tRLDV (4 x CST) tCLCL - 18 ns 1 £ CST £ 7 Data Hold After RD (P3.7 or PSEN) High tRHDX -2 ns tCR tCF tCLK tCH XTAL1 tCL |
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