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AT89C5130A-S3SUM Datasheet(PDF) 8 Page - ATMEL Corporation |
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AT89C5130A-S3SUM Datasheet(HTML) 8 Page - ATMEL Corporation |
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8 / 186 page  8 AT89C5130A/31A-M 4337G–USB–11/06 Table 5. LED Signal Description Table 6. TWI Signal Description Table 7. SPI Signal Description T0 I Timer Counter 0 External Clock Input When Timer 0 operates as a counter, a falling edge on the T0 pin increments the count. P3.4 T1 I Timer/Counter 1 External Clock Input When Timer 1 operates as a counter, a falling edge on the T1 pin increments the count. P3.5 T2 I O Timer/Counter 2 External Clock Input Timer/Counter 2 Clock Output P1.0 T2EX I Timer/Counter 2 Reload/Capture/Direction Control Input P1.1 Signal Name Type Description Alternate Function LED[3:0] O Direct Drive LED Output These pins can be directly connected to the Cathode of standard LEDs without external current limiting resistors. The typical current of each output can be programmed by software to 2, 6 or 10 mA. Several outputs can be connected together to get higher drive capabilities. P3.3 P3.5 P3.6 P3.7 Signal Name Type Description Alternate Function SCL I/O SCL: TWI Serial Clock SCL output the serial clock to slave peripherals. SCL input the serial clock from master. P4.0 SDA I/O SDA: TWI Serial Data SCL is the bidirectional TWI data line. P4.1 Signal Name Type Description Alternate Function SS I/O SS: SPI Slave Select P1.1 MISO I/O MISO: SPI Master Input Slave Output line When SPI is in master mode, MISO receives data from the slave peripheral. When SPI is in slave mode, MISO outputs data to the master controller. P1.5 SCK I/O SCK: SPI Serial Clock SCK outputs clock to the slave peripheral or receive clock from the master P1.6 MOSI I/O MOSI: SPI Master Output Slave Input line When SPI is in master mode, MOSI outputs data to the slave peripheral. When SPI is in slave mode, MOSI receives data from the master controller P1.7 Table 4. Timer 0, Timer 1 and Timer 2 Signal Description (Continued) Signal Name Type Description Alternate Function |
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