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NRF9160-SICA-R7 Datasheet(PDF) 128 Page - Nordic Semiconductor |
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NRF9160-SICA-R7 Datasheet(HTML) 128 Page - Nordic Semiconductor |
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128 / 400 page  Peripherals 6.7.9 Pin configuration The MCK, SCK, LRCK, SDIN and SDOUT signals associated with the I2S module are mapped to physical pins according to the pin numbers specified in the PSEL.x registers. These pins are acquired whenever the I2S module is enabled through the register ENABLE on page 133. When a pin is acquired by the I2S module, the direction of the pin (input or output) will be configured automatically, and any pin direction setting done in the GPIO module will be overridden. The directions for the various I2S pins are shown below in GPIO configuration before enabling peripheral (master mode) on page 128 and GPIO configuration before enabling peripheral (slave mode) on page 128. To secure correct signal levels on the pins when the system is in OFF mode, and when the I2S module is disabled, these pins must be configured in the GPIO peripheral directly. I2S signal I2S pin Direction Output value Comment MCK As specified in PSEL.MCK Output 0 LRCK As specified in PSEL.LRCK Output 0 SCK As specified in PSEL.SCK Output 0 SDIN As specified in PSEL.SDIN Input Not applicable SDOUT As specified in PSEL.SDOUT Output 0 Table 46: GPIO configuration before enabling peripheral (master mode) I2S signal I2S pin Direction Output value Comment MCK As specified in PSEL.MCK Output 0 LRCK As specified in PSEL.LRCK Input Not applicable SCK As specified in PSEL.SCK Input Not applicable SDIN As specified in PSEL.SDIN Input Not applicable SDOUT As specified in PSEL.SDOUT Output 0 Table 47: GPIO configuration before enabling peripheral (slave mode) 6.7.10 Registers Base address Peripheral Instance Secure mapping DMA security Description Configuration 0x50028000 0x40028000 I2S I2S : S I2S : NS US SA Inter-IC Sound Table 48: Instances Register Offset Security Description TASKS_START 0x000 Starts continuous I2S transfer. Also starts MCK generator when this is enabled. TASKS_STOP 0x004 Stops I2S transfer. Also stops MCK generator. Triggering this task will cause the STOPPED event to be generated. SUBSCRIBE_START 0x080 Subscribe configuration for task START SUBSCRIBE_STOP 0x084 Subscribe configuration for task STOP EVENTS_RXPTRUPD 0x104 The RXD.PTR register has been copied to internal double-buffers. When the I2S module is started and RX is enabled, this event will be generated for every RXTXD.MAXCNT words that are received on the SDIN pin. EVENTS_STOPPED 0x108 I2S transfer stopped. EVENTS_TXPTRUPD 0x114 The TDX.PTR register has been copied to internal double-buffers. When the I2S module is started and TX is enabled, this event will be generated for every RXTXD.MAXCNT words that are sent on the SDOUT pin. 4418_1315 v2.0 128 |
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