 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
AM3874 Datasheet(PDF) 238 Page - Texas Instruments |
|
|
|
|||||||||||||||||||||||||||||
AM3874 Datasheet(HTML) 238 Page - Texas Instruments |
|
|
238 / 361 page  AM3874, AM3871 SPRS695C – SEPTEMBER 2011 – REVISED DECEMBER 2013 www.ti.com 8.7 General-Purpose Input/Output (GPIO) The GPIO peripheral provides general-purpose pins that can be configured as either inputs or outputs. When configured as an output, a write to an internal register controls the state driven on the output pin. When configured as an input, the state of the input is detectable by reading the state of an internal register. In addition, the GPIO peripheral can produce CPU interrupts in different interrupt generation modes. The GPIO peripheral provides generic connections to external devices. The device contains four GPIO modules and each GPIO module is made up of 32 identical channels. The device GPIO peripheral supports the following: • Up to 128 1.8-V/3.3-V GPIO pins, GP0[0:31], GP1[0:31], GP2[0:31], and GP3[0:31] (the exact number available varies as a function of the device configuration). Each channel can be configured to be used in the following applications: – Data input/output – Keyboard interface with a de-bouncing cell – Synchronous interrupt generation (in active mode) upon the detection of external events (signal transitions and/or signal levels). • Synchronous interrupt requests from each channel are processed by four identical interrupt generation sub-modules to be used independently by the ARM or Media Controller. Interrupts can be triggered by rising and/or falling edge, specified for each interrupt-capable GPIO signal. • Shared registers can be accessed through "Set and Clear" protocol. Software writes 1 to corresponding bit position or positions to set or to clear the GPIO signal. This allows multiple software processes to toggle GPIO output signals without critical section protection (disable interrupts, program GPIO, re-enable interrupts, to prevent context switching to another process during GPIO programming). • Separate input/output registers. • Output register in addition to set/clear so that, if preferred by software, some GPIO output signals can be toggled by direct write to the output register. • Output register, when read, reflects output drive status. This, in addition to the input register reflecting pin status and open-drain I/O cell, allows wired logic to be implemented. For more detailed information on GPIOs, see the General-Purpose I/O (GPIO) Interface chapter of the AM387x Sitara™ ARM Processors Technical Reference Manual (Literature Number: SPRUGZ7). 8.7.1 GPIO Peripheral Register Descriptions Table 8-30. GPIO Registers HEX ADDRESS GPIO0 GPIO1 GPIO2 GPIO3 ACRONYM REGISTER NAME 0x4803 2000 0x4804 C000 0x481A C000 0x481A E000 GPIO_REVISION GPIO Revision 0x4803 2010 0x4804 C010 0x481A C010 0x481A E010 GPIO_SYSCONFIG System Configuration 0x4803 2020 0x4804 C020 0x481A C020 0x481A E020 GPIO_EOI End of Interrupt 0x4803 2024 0x4804 C024 0x481A C024 0x481A E024 GPIO_IRQSTATUS Status Raw for Interrupt 1 _RAW_0 0x4803 2028 0x4804 C028 0x481A C028 0x481A E028 GPIO_IRQSTATUS Status Raw for Interrupt 2 _RAW_1 0x4803 202C 0x4804 C02C 0x481A C02C 0x481A E02C GPIO_IRQSTATUS Status for Interrupt 1 _0 0x4803 2030 0x4804 C030 0x481A C030 0x481A E030 GPIO_IRQSTATUS Status for Interrupt 2 _1 0x4803 2034 0x4804 C034 0x481A C034 0x481A E034 GPIO_IRQSTATUS Enable Set for Interrupt 1 _SET_0 0x4803 2038 0x4804 C038 0x481A C038 0x481A E038 GPIO_IRQSTATUS Enable Set for Interrupt 2 _SET_1 238 Peripheral Information and Timings Copyright © 2011–2013, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: AM3874 AM3871 |
|
Link URL |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link to Datasheet | Link Exchange | Manufacturer List 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 |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
