Os motores de busca de Datasheet de Componentes eletrônicos |
|
LC72349 Folha de dados(PDF) 7 Page - Sanyo Semicon Device |
|
LC72349 Folha de dados(HTML) 7 Page - Sanyo Semicon Device |
7 / 14 page No. 6472-7/14 LC72348G/W, 72349G/W Pin Functions Pin No. Pin I/O Function I/O circuit 75 kHz oscillator connections 64 1 XIN XOUT I O IC testing. These pins must be connected to ground during normal operation. — 63 2 TEST1 TEST2 I I Special-purpose key return signal input ports designed with a low threshold voltage. When used in conjunction with port PB to form a key matrix, up to 3 simultaneous key presses can be detected. The four pull-down resistors are selected together in a single operation using the IOS instruction (PWn = 2, b1); they cannot be specified individually. Input is disabled in backup mode, and the pull-down resistors are disabled after a reset. 6 5 4 3 PA0 PA1 PA2 PA3 I General-purpose CMOS and n-channel open-drain output shared-function ports. The IOS instruction (Pwn = 2) is used for function switching. (b0: PB0, b2: PB1, b3: PB2, PB3) (0: general-purpose CMOS, 1: n-channel open- drain) Special-purpose key source signal output ports. Since unbalanced CMOS output transistor circuits are used, diodes to prevent short-circuits when multiple keys are pressed are not required. These ports go to the output high-impedance state in backup mode. These ports go to the output high-impedance state after a reset and remain in that state until an output instruction (OUT, SPB, or RPB) is executed. *: Verify the output impedance conditions carefully if these pins are used for functions other than key source outputs. 10 9 8 7 PB0 PB1 PB2 PB3 O General-purpose I/O ports. PD0 can be used as an external interrupt port. Input or output mode can be set individually using the IOS instruction by the bit (Pwn = 4, 5). A value of 0 specifies input, and 1 specifies output. These ports go to the input disabled high-impedance state in backup mode. They are set to function as general-purpose input ports after a reset. 14 13 12 11 18 17 16 15 PC0 PC1 PC2 PC3 INT/PD0 PD1 PD2 PD3 *2 I/O General-purpose output ports with shared beep tone output function (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 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. 20 19 BEEP/PE0 PE1 Input with built-in pull-down resistor Unbalanced CMOS push- pull/n-channel open-drain N-channel open-drain CMOS push-pull Continued on next page. |
Nº de peça semelhante - LC72349 |
|
Descrição semelhante - LC72349 |
|
|
Ligação URL |
Privacy Policy |
ALLDATASHEETPT.COM |
ALLDATASHEET é útil para você? [ DONATE ] |
Sobre Alldatasheet | Publicidade | Contato conosco | Privacy Policy | roca de Link | Lista de Fabricantes All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |