Module rp2040_pac::i2c0::ic_enable_status

I2C Enable Status Register

The register is used to report the DW_apb_i2c hardware status when the IC_ENABLE[0] register is set from 1 to 0; that is, when DW_apb_i2c is disabled.

If IC_ENABLE[0] has been set to 1, bits 2:1 are forced to 0, and bit 0 is forced to 1.

If IC_ENABLE[0] has been set to 0, bits 2:1 is only be valid as soon as bit 0 is read as ‘0’.

Note: When IC_ENABLE[0] has been set to 0, a delay occurs for bit 0 to be read as 0 because disabling the DW_apb_i2c depends on I2C bus activities.

Structs

• IC_ENABLE_STATUS_SPEC
  I2C Enable Status Register

Enums

• IC_EN_A
  ic_en Status. This bit always reflects the value driven on the output port ic_en. - When read as 1, DW_apb_i2c is deemed to be in an enabled state. - When read as 0, DW_apb_i2c is deemed completely inactive. Note: The CPU can safely read this bit anytime. When this bit is read as 0, the CPU can safely read SLV_RX_DATA_LOST (bit 2) and SLV_DISABLED_WHILE_BUSY (bit 1).
• SLV_DISABLED_WHILE_BUSY_A
  Slave Disabled While Busy (Transmit, Receive). This bit indicates if a potential or active Slave operation has been aborted due to the setting bit 0 of the IC_ENABLE register from 1 to 0. This bit is set when the CPU writes a 0 to the IC_ENABLE register while:
• SLV_RX_DATA_LOST_A
  Slave Received Data Lost. This bit indicates if a Slave-Receiver operation has been aborted with at least one data byte received from an I2C transfer due to the setting bit 0 of IC_ENABLE from 1 to 0. When read as 1, DW_apb_i2c is deemed to have been actively engaged in an aborted I2C transfer (with matching address) and the data phase of the I2C transfer has been entered, even though a data byte has been responded with a NACK.

Type Aliases

• IC_EN_R
  Field IC_EN reader - ic_en Status. This bit always reflects the value driven on the output port ic_en. - When read as 1, DW_apb_i2c is deemed to be in an enabled state. - When read as 0, DW_apb_i2c is deemed completely inactive. Note: The CPU can safely read this bit anytime. When this bit is read as 0, the CPU can safely read SLV_RX_DATA_LOST (bit 2) and SLV_DISABLED_WHILE_BUSY (bit 1).
• R
  Register IC_ENABLE_STATUS reader
• SLV_DISABLED_WHILE_BUSY_R
  Field SLV_DISABLED_WHILE_BUSY reader - Slave Disabled While Busy (Transmit, Receive). This bit indicates if a potential or active Slave operation has been aborted due to the setting bit 0 of the IC_ENABLE register from 1 to 0. This bit is set when the CPU writes a 0 to the IC_ENABLE register while:
• SLV_RX_DATA_LOST_R
  Field SLV_RX_DATA_LOST reader - Slave Received Data Lost. This bit indicates if a Slave-Receiver operation has been aborted with at least one data byte received from an I2C transfer due to the setting bit 0 of IC_ENABLE from 1 to 0. When read as 1, DW_apb_i2c is deemed to have been actively engaged in an aborted I2C transfer (with matching address) and the data phase of the I2C transfer has been entered, even though a data byte has been responded with a NACK.