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73S1209F Datasheet(PDF) 8 Page - Teridian Semiconductor Corporation |
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73S1209F Datasheet(HTML) 8 Page - Teridian Semiconductor Corporation |
8 / 123 page 73S1209F Data Sheet DS_1209F_004 1 Hardware Description 1.1 Pin Description Table 1: 73S1209F Pinout Description Pin Name Description X12IN 10 8 I Figure 26 MPU clock crystal oscillator input pin. A 1MΩ resistor is required between pins X12IN and X12OUT. X12OUT 11 9 O Figure 26 MPU clock crystal oscillator output pin. ROW (5:0) 0 1 2 3 4 5 21 22 24 34 37 38 I Figure 32 Keypad row input sense. COL(4:0) 0 1 2 3 4 12 13 14 16 19 O Figure 33 Keypad column output scan pins. USR(8:0) 0 1 2 3 4 5 6 7 8 36 35 33 31 30 29 23 20 32 24 23 22 21 20 19 14 13 IO Figure 29 General-purpose user pins, individually configurable as inputs or outputs or as external input interrupt ports. SCL 5 5 O Figure 28 I 2C (master mode) compatible Clock signal. Note: the pin is configured as an open drain output. When the I2C interface is being used, an external pull up resistor is required. A value of 3K is recommended. SDA 6 6 IO Figure 27 I 2C (master mode) compatible data I/O. Note: this pin is bi-directional. When the pin is configured as output, it is an open drain output. When the I2C interface is being used, an external pull up resistor is required. A value of 3K is recommended. LED(1:0) 0 1 1 3 3 4 IO Figure 34 Special output drivers, programmable pull-down current to drive LEDs. May also be used as inputs. RXD 17 11 I Figure 31 Serial UART Receive data pin. TXD 18 12 O Figure 28 Serial UART Transmit data pin. INT3 51 I Figure 31 General purpose interrupt input. 8 Rev. 1.2 |
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