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AT83SND1CXXX-ROTIL Datasheet(PDF) 5 Page - ATMEL Corporation |
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AT83SND1CXXX-ROTIL Datasheet(HTML) 5 Page - ATMEL Corporation |
5 / 212 page 5 4109J–8051–10/06 AT8xC51SND1C Figure 4-3. AT8xC51SND1C 84-pin PLCC Package 4.2 Signals All the AT8xC51SND1C signals are detailed by functionality in Table 1 to Table 14. Table 1. Ports Signal Description AT89C51SND1C-SR (FLASH) 65 64 63 62 61 60 59 58 55 56 57 12 13 14 15 16 17 22 20 19 NC P2.3/A11 P2.4/A12 P2.6/A14 P2.5/A13 P2.7/A15 MCLK MDAT MCMD PAVSS VSS X2 NC X1 18 21 23 24 25 69 68 67 66 70 VSS VDD RST SCLK DSEL DCLK DOUT P1.0/KIN0 P1.1/KIN1 P1.2/KIN2 P1.3/KIN3 P1.4 P1.5 P1.7/SDA FILT PAVDD VDD P1.6/SCL 26 TST P2.2/A10 54 ALE ISP 28 27 29 30 31 32 UVDD UVSS 74 73 72 71 P4.4 P4.5 VDD VSS Signal Name Type Description Alternate Function P0.7:0 I/O Port 0 P0 is an 8-bit open-drain bidirectional I/O port. Port 0 pins that have 1s written to them float and can be used as high impedance inputs. To avoid any parasitic current consumption, floating P0 inputs must be polarized to V DD or VSS. AD7:0 P1.7:0 I/O Port 1 P1 is an 8-bit bidirectional I/O port with internal pull-ups. KIN3:0 SCL SDA P2.7:0 I/O Port 2 P2 is an 8-bit bidirectional I/O port with internal pull-ups. A15:8 |
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