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T83C5101 Datasheet(PDF) 5 Page - ATMEL Corporation |
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T83C5101 Datasheet(HTML) 5 Page - ATMEL Corporation |
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5 / 58 page  5 T8xC5101/02 4233H–8051–02/08 T8xC5101/02 Pin Configuration Mnemonic Pin Number Type Name and Function 24 pins 28 pins VSS 12 14 I Ground: 0V reference VCC 24 28 I Power Supply: This is the power supply voltage for normal, idle and power-down operation P1.0-P1.7 13-20 15-20 22-23 I/O Port 1: Port 1 is an 8-bit bidirectional I/O port with internal pull-ups. Port 1 pins that have 1s written to them are pulled high by the internal pull-ups and can be used as inputs. As inputs, Port 1 pins that are externally pulled low will source current because of the internal pull-ups. Port 1 also receives the low-order address byte during memory programming and verification. Alternate functions for Port 1 include: I/O T2 (P1.0): Timer/Counter 2 external count input/Clockout I T2EX (P1.1): Timer/Counter 2 Reload/Capture/Direction Control P4.0 (Prog)-P4.1 (Test) 7 8 8 9 O (I) O (I) Port 4 bits 0 & 1: Except during programming and verifying, these two bits are output port driving 30 micro Amps at high level and sinking 10 mA at low level (Vol < 1V). If they have 1s written to them, they output a high level and if they have 0 written to them, they output a low level. These 2 pins cannot be used as inputs. Users should take care to never externally drive these pins low, especially during reset. These two pins are primarily designed to drive LEDs. During programming and verifying, these two pins are used as input, as explained in the corresponding chapter. A Read or a Read/Modify/Write instruction to these bits will read the status of the output: 1 if the output is 1, 0 if the output is 0. P4.2-P4.5 NA 27 7 13 21 I/O Port 4 bits 2 to 5: bidirectional I/O port with internal pull-ups. Port 4.2 to 4.5 pins that have 1s written to them are pulled high by the internal pull-ups and can be used as inputs. As inputs, Port 4.2 to 4.5 pins that are externally pulled low will source current because of the internal pull-ups. P3.0-P3.7 5-1 23-21 5-1 26-24 I/O Port 3: Port 3 is an 8-bit bidirectional I/O port with internal pull-ups. Port 3 pins that have 1s written to them are pulled high by the internal pull-ups and can be used as inputs. As inputs, Port 3 pins that are externally pulled low will source current because of the internal pull-ups. Port 3 also serves the special features of the 80C51 family, as listed below. 5 5 I RxD (P3.0): Serial input port 4 4 O TxD (P3.1): Serial output port 3 3 I INT0 (P3.2): External interrupt 0 2 2 I INT1 (P3.3): External interrupt 1 P4.1/Test P3.0 RST XTAL2 XTAL1 P3.1 1 VPP P4.0/Prog Vss P1.6 P1.4 P1.5 P1.3 P1.1/T2EX P1.0/T2 P1.2 P3.4/T0 P3.2/INT0 P3.3/INT1 Vcc P3.5/T1 P3.6 P3.7 P1.7 DIL24 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 SSOP24* * Check for availability SO24 P4.1/Test P3.0 RST XTAL2 XTAL1 P3.1 1 VPP P4.0/Prog Vss P1.6 P1.4 P1.5 P1.3 P1.1/T2EX P1.0/T2 P1.2 P3.4/T0 P3.2/INT0 P3.3/INT1 Vcc P3.5/T1 P3.6 P3.7 P1.7 2 3 4 5 6 8 9 10 11 12 13 28 27 26 25 24 23 21 20 19 18 17 16 * Check for availability SO28* P4.3 7 P4.4 14 15 P4.5 P4.2 22 |
Similar Part No. - T83C5101_14 |
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Similar Description - T83C5101_14 |
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