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T85C5121-ICRIL Datasheet(PDF) 6 Page - ATMEL Corporation |
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T85C5121-ICRIL Datasheet(HTML) 6 Page - ATMEL Corporation |
6 / 110 page 6 T8xC5121 4164E–SCR–02/04 I/O Input/Output function P3.4 is a bi-directional I/O port with internal pull-ups. I Timer 0 function: External clock input When Timer 0 operates as a counter, a falling edge on the T0 pin increments the count. Z Reset configuration High impedance due to PMOS switched OFF P3.5 CIO1 DVCC I/O Alternate card function Card I/O I/O Input/Output function P3.5 is a bi-directional I/O port with internal pull-ups. I Timer 1 function: External clock input When Timer 1 operates as a counter, a falling edge on the T1 pin increments the count. I Reset configuration Input (high level due to internal pull-up) P3.6 CCLK1 LED1 DVCC O Alternate card function Card clock O LED function These pins can be directly connected to the cathode of standard LED without external current limiting resistors. The typical current of each output can be programmed by software to 2, 4 or 10 mA (LEDCON register). I/O Input/Output function P3.6 is a LED port. I Reset configuration Input at high level P3.7 CRST1 DVCC O Alternate card function Card reset P3.7 CRST1 LED0 DVCC O LED function These pins can be directly connected to the cathode of standard LED without external current limiting resistors. The typical current of each output can be programmed by software to 2, 4 or 10 mA (LEDCON register). I/O Input/Output function P3.7 is a a LED port. I Reset configuration Input at high level Table 1. Ports Description (Continued) Port Signal Name Alternate Internal Power Supply ESD Type Description |
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