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LC72315W датащи(PDF) 7 Page - Sanyo Semicon Device |
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LC72315W датащи(HTML) 7 Page - Sanyo Semicon Device |
7 / 12 page No. 6650-7/12 LC72314W, 72315W, 72316W Pin Functions Pin No. Pin I/O Function I/O circuit 75 kHz oscillator connections 80 1 XIN XOUT I O IC testing. These pins must be connected to ground during normal operation. — 79 2 TEST1 TEST2 I I Special-purpose ports for key return signal input designed with a low threshold voltage. When a key matrix is formed in combination with port PB, simultaneous multiple key presses with up to 3 keys can be detected. The pull-down resistors are set up for all four pins at the same time with the IOS instruction (PWn = 2.b1). This setting cannot be specified for individual pins. In backup mode, these pins go to the input disabled state, and the pull-down resistors are disabled after a reset. 6 5 4 3 PA0 PA1 PA2 PA3 I Unbalanced CMOS outputs. These outputs are switched with the IOS 0 instruction. Since these outputs are unbalanced, no diodes are required to prevent short circuits due to simultaneous multiple key presses. These outputs go to the high-impedance output state in backup mode. After a reset, they go to the high-impedance output state and remain in that state until an output instruction (OUT, SPB, or RPB) is executed. 10 9 8 7 PB0 PB1 PB2 PB3 O General-purpose I/O ports. PD0, PD1 can be used as an external interrupt port. The IOS instruction (Pwn = 4, 5) is used for switching the general-purpose I/O port function, and these ports can be set to input or output in 1-bit units. (0: input, 1: output) In backup mode they go to the input disabled high-impedance state. After a reset, they switch to the general-purpose input port function. 14 13 12 11 22 21 20 19 PC0 PC1 PC2 PC3 INT0/PD0 INT1/PD1 PD2 PD3 *2 I/O O General-purpose output and beep tone output shared function ports (PE0 only). The BEEP instruction is used to switch PE0 between the general-purpose output port and beep tone output functions. To use PE0 as a general-purpose output port, execute a BEEP instruction with b2 set to 0. Set b2 to 1 to use PE0 as the beep tone output port. The b0 and b1 bits are used to select the beep tone frequency. There are two beep tone frequencies supported. *: When PE0 is set up as the beep tone output, executing an output instruction to PE0 only changes the state of the internal output latch, it does not affect the beep tone output in any way. Only the PE0 pin can be switched between the general-purpose output function and the beep tone output function; the PE1 to PE3 pin only functions as a general-purpose output. These pins go to the high-impedance state in backup mode and remain in that state until an output instruction or a BEEP instruction is executed. Since these ports are open-drain ports, resistors must be inserted between these pins and VDD. These ports are set to general-purpose output port function after a reset. 26 25 24 23 BEEP/PE0 PE1 PE2 PE3 I/O I I I I/O I/O I/O I/O Shared function pins used as either general-purpose I/O ports or a serial I/O port (only port PK). When used as general-purpose I/O ports, the I/O direction can be switched in single bit units with the IOS instruction (Pwn = 1, C). The IOS instruction (with Pwn = 1, b2) is used to switch the function between the general-purpose I/O port and the serial I/O port function. (0: general-purpose I/O port, 1: serial I/O) In backup mode (low power mode) these pins go to the input disabled high- impedance state. After a reset, the general-purpose input port function is selected. Pins PL1, PL2, and PL3 are used as input ports. 18 17 16 15 34 33 32 31 PL0 PL1 PL2 PL3 PK0 SCK1/PK1 SO1/PK2 SI1/PK3 Input with built-in pull-down resistor N-channel open-drain CMOS input CMOS push-pull CMOS push-pull Continued on next page. Unbalanced CMOS push-pull |
Аналогичный номер детали - LC72315W |
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Аналогичное описание - LC72315W |
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