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TS87C51RD2 Datasheet(PDF) 9 Page - ATMEL Corporation |
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TS87C51RD2 Datasheet(HTML) 9 Page - ATMEL Corporation |
9 / 74 page Rev. C - 06 March, 2001 9 TS80C51RA2/RD2 TS83C51RB2/RC2/RD2 TS87C51RB2/RC2/RD2 5.1. Pin Description for 64/68 pin Packages Port 4 and Port 5 are 8-bit bidirectional I/O ports with internal pull-ups. Pins that have 1 written to them are pulled high by the internal pull ups and can be used as inputs. As inputs, pins that are externally pulled low will source current because of the internal pull-ups. Refer to the previous pin description for other pins. Table 2. 64/68 Pin Packages Configuration PLCC68 SQUARE VQFP64 1.4 VSS 51 9/40 VCC 17 8 P0.0 15 6 P0.1 14 5 P0.2 12 3 P0.3 11 2 P0.4 9 64 P0.5 6 61 P0.6 5 60 P0.7 3 59 P1.0 19 10 P1.1 21 12 P1.2 22 13 P1.3 23 14 P1.4 25 16 P1.5 27 18 P1.6 28 19 P1.7 29 20 P2.0 54 43 P2.1 55 44 P2.2 56 45 P2.3 58 47 P2.4 59 48 P2.5 61 50 P2.6 64 53 P2.7 65 54 P3.0 34 25 P3.1 39 28 |
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