поискавой системы для электроныых деталей |
|
HT48R063B датащи(PDF) 35 Page - Holtek Semiconductor Inc |
|
HT48R063B датащи(HTML) 35 Page - Holtek Semiconductor Inc |
35 / 82 page HT48R063B/064B/065B/066B Rev. 1.20 35 June 3, 2013 Input/Output Ports Holtek microcontrollers offer considerable flexibility on their I/O ports. Most pins can have either an input or out- put designation under user program control. Addi- tionally, as there are pull-high resistors and wake-up software configurations, the user is provided with an I/O structure to meet the needs of a wide range of applica- tion possibilities. For input operation, these ports are non-latching, which means the inputs must be ready at the T2 rising edge of instruction ²MOV A,[m]², where m denotes the port ad- dress. For output operation, all the data is latched and remains unchanged until the output latch is rewritten. Pull-high Resistors Many product applications require pull-high resistors for their switch inputs usually requiring the use of an external resistor. To eliminate the need for these external resis- tors, when configured as an input have the capability of being connected to an internal pull-high resistor. These pull-high resistors are selectable via a register known as PAPU, PBPU, PCPU, PDPU, PEPU and PFPU located in the Data Memory. The pull-high resistors are imple- mented using weak PMOS transistors. Note that pin PA7 does not have a pull-high resistor selection. Port A Wake-up If the HALT instruction is executed, the device will enter the Idle/Sleep Mode, where the system clock will stop resulting in power being conserved, a feature that is im- portant for battery and other low-power applications. Various methods exist to wake-up the microcontroller, one of which is to change the logic condition on one of the PA0~PA7 pins from high to low. After a HALT instruc- tion forces the microcontroller into entering the Idle/Sleep Mode, the processor will remain idle or in a low-power state until the logic condition of the selected wake-up pin on Port A changes from high to low. This function is especially suitable for applications that can be woken up via external switches. Note that pins PA0 to PA7 can be selected individually to have this wake-up feature using an internal register known as PAWK, lo- cated in the Data Memory. · PAWK, PAC, PAPU, PBC, PBPU, PCC, PCPU, PDC, PDPU, PEC, PEPU, PFC, PFPU Register ¨ HT48R063B Register Name POR Bit 76543210 PAWK 00H PAWK7 PAWK6 PAWK5 PAWK4 PAWK3 PAWK2 PAWK1 PAWK0 PAC FFH PAC7 PAC6 PAC5 PAC4 PAC3 PAC2 PAC1 PAC0 PAPU 00H ¾ PAPU6 PAPU5 PAPU4 PAPU3 PAPU2 PAPU1 PAPU0 PBC 3FH ¾¾ PBC5 PBC4 PBC3 PBC2 PBC1 PBC0 PBPU 00H ¾¾ PBPU5 PBPU4 PBPU3 PBPU2 PBPU1 PBPU0 ²¾² Unimplemented, read as ²0² PAWKn: PA wake-up function enable 0: disable 1: enable PACn/PBCn: I/O type selection 0: output 1: input PAPUn/PBPUn: Pull-high function enable 0: disable 1: enable |
Аналогичный номер детали - HT48R063B_13 |
|
Аналогичное описание - HT48R063B_13 |
|
|
ссылки URL |
Конфиденциальность |
ALLDATASHEETRU.COM |
Вашему бизинису помогли Аллдатащит? [ DONATE ] |
Что такое Аллдатащит | реклама | контакт | Конфиденциальность | обмен ссыками | поиск по производителю 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 |