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71M6543HT-IGTR/F 数据表(PDF) 16 Page - Maxim Integrated Products |
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71M6543HT-IGTR/F 数据表(HTML) 16 Page - Maxim Integrated Products |
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16 / 75 page  Maxim Integrated │ 16 71M6543FT/71M6543HT/ 71M6543GT/71M6543GHT Energy Meter ICs www.maximintegrated.com Pin Descriptions (continued) PIN NAME TYPE CIRCUIT FUNCTION 100 DIGITAL PINS 12–15 COM0–COM3 O 5 LCD Common Outputs. These four pins provide the select signals for the LCD display. 45 SEGDIO0/WPULSE I/O 3, 4, 5 Multiple-UsePins.ConfigurableaseitherLCDsegmentdriverorDIO. Alternative functions with proper selection of associated I/O RAM registers are: SEGDIO0 = WPULSE SEGDIO1 = VPULSE SEGDIO2 = SDCK SEGDIO3 = SDATA SEGDIO6 = XPULSE SEGDIO7 = YPULSE SEGDIO8 = DI SEGDIO16 = RX3 SEGDIO17 = TX3 UnusedpinsmustbeconfiguredasoutputsorterminatedtoV3P3/GNDD. 44 SEGDIO1/VPULSE 43 SEGDIO2/SDCK 42 SEGDIO3/SDATA 41 SEGDIO4 39 SEGDIO5 38 SEGDIO6/XPULSE 37 SEGDIO7/YPULSE 36 SEGDIO8/DI 35–30 SEGDIO[9:14] 29–27 SEGDIO[15:17] 25 SEGDIO[18] 24–18 SEGDIO[19:25] 11–4 SEGDIO[28:35] 95–94 SEGDIO[44:45] 99–96 SEGDIO[40:43] 52 SEGDIO52 51 SEGDIO53 47 SEGDIO54 17 SEGDIO26/COM5 I/O 3, 4, 5 Multiple-UsePins.ConfigurableaseitherLCDsegmentdriverorDIOwith alternative function (LCD common drivers). 16 SEGDIO27/COM4 3 SPI_CSZ/SEGDIO36 I/O 3, 4, 5 Multiple-UsePins.ConfigurableaseitherLCDsegmentdriverorDIOwith alternative function (SPI interface). 2 SPI_DO/SEGDIO37 1 SPI_DI/SEGDIO38 100 SPI_CKI/SEGDIO39 53 OPT_TX/SEGDIO51 I/O 3, 4, 5 Multiple-UsePins,configurableaseitherLCDsegmentdriverorDIOwith alternative function (optical port/UART1) 46 OPT_RX/SEGDIO55 58 E_RXTX/SEG48 I/O 1, 4, 5 MultiusePins.Configurableaseitheremulatorportpins(whenICE_E pulled high) or LCD segment drivers (when ICE_E tied to GND). 56 E_RST/SEG50 57 E_TCLK/SEG49 O 4, 5 59 ICE_E I 2 ICE Enable. When zero, E_RST, E_TCLK, and E_RXTX become SEG50, SEG49, and SEG48, respectively. For production units, this pin should be pulled to GND to disable the emulator port. 92 TMUXOUT/SEG47 O 4, 5 Multiple-UsePins.Configurableaseithermultiplexer/clockoutputorLCD segment driver using the I/O RAM registers. 93 TMUX2OUT/SEG46 91 RESET I 2 Chip Reset. This input pin is used to reset the chip into a known state. For normal operation, this pin is pulled low. To reset the chip, this pin should be pulled high. This pin has an internal 30FA (nominal) current source pulldown. No external reset circuitry is necessary. |
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