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UPD17242MC-XXX-5A4 Datasheet(PDF) 11 Page - NEC |
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UPD17242MC-XXX-5A4 Datasheet(HTML) 11 Page - NEC |
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11 / 102 page  11 Data Sheet U15002EJ1V0DS µPD17240, 17241, 17242, 17243, 17244, 17245, 17246 1.1 Pin Function List (3/3) Pin No. Pin Name Function Output Format After Reset 14 P1A0 These pins constitute a 3-bit I/O port that can be set to the input or When key CMOS input 15 P1A1 output mode in 1-bit units. matrix is (when key 30 P1A2 If this port is set to the input mode when a key matrix is used, it used: N-ch matrix is not functions as a CMOS input port and can be used to input key open-drain, used and return signals. At this time, whether a pull-up/down resistor is when key no resistor connected to this port and the standby mode release condition matrix is not connected) (whether it is released when this pin is high or low) can be used: CMOS selected in 1-bit units push-pull. 1. If connection of a resistor is specified and if it is specified that the standby mode is released when this port goes low ... A pull-up resistor is connected. If a low level is input to the set key, the standby mode is released. 2. If connection of a resistor is specified and if it is specified that the standby mode is released when this port goes high ... A pull-down resistor is connected. If a high level is input to the set key, the standby mode is released. 3. If connection of a resistor is not specified and if it is specified that the standby mode is released when this port goes low (or high) ... No resistor is connected. If a low (or high) level is input to the set key, the standby mode is released. If this port is set to the output mode when a key matrix is used, it functions as an N-ch open-drain output port and can be used to output key matrix signals. If this port is set to the input mode when a key matrix is used, it functions as a CMOS input port. Connection of a resistor to this port and whether the resistor is pull-up or pull-down can be selected in 1-bit units. If this port is set in the output mode when a key matrix is not used, it functions as a high-current CMOS output port. 16 P0A0 These pins are CMOS input pins with a 4-bit pull-up resistor. – CMOS input 17 P0A1 They can be used to input the key return signals of a key matrix. with pull-up 18 P0A2 If any one of these pins goes low, the standby status is released. resistor 19 P0A3 20 P0B0 These pins constitute a 4-bit I/O port that can be set to the input or N-ch CMOS input 21 P0B1 output mode in 1-bit units. open drain with pull-up 22 P0B2 In the input mode, these pins are CMOS input pins with a pull-up resistor 23 P0B3 resistor, and can be used to input the key return signals of a key matrix. The standby status is released when at least one of these pins goes low. In the output mode, they serve as N-ch open-drain output pins and can be used to output the key return signals of a key matrix. 24 P0C0 These pins constitute a 4-bit I/O port that can be set to the input or N-ch Low-level 25 P0C1 output mode in 4-bit units (group I/O). open drain output 26 P0C2 In the input mode, these pins are CMOS input pins with a pull-up 27 P0C3 resistor, and can be used to input the key return signals of a key matrix. The standby status is released when at least one of these pins goes low. In the output mode, they serve as N-ch open-drain output pins and can be used to output the key return signals of a key matrix. |
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