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T83C51SND1-ROTIL Datasheet(PDF) 4 Page - ATMEL Corporation |
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T83C51SND1-ROTIL Datasheet(HTML) 4 Page - ATMEL Corporation |
4 / 60 page 4 T8xC51SND1 Rev. D – 15-Nov-01 Figure 2. T8xC51SND1 84-pin PLCC Package 4.2 Signals All the T8xC51SND1 signals are detailed by functionality in Table 1 to Table 14. Table 1. Ports Signal Description T89C51SND1-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 VDD 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 |
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