Apollo Register Documentation  v${version}
TPIU - ARM Trace Port Interface Unit

TPIU Register Index

  0xE0040000:   SSPSR - Supported Parallel Port Sizes.
  0xE0040004:   CSPSR - Current Parallel Port Size.
  0xE0040010:   ACPR - Asynchronous Clock Prescaler.
  0xE00400F0:   SPPR - Selected Pin Protocol.
  0xE0040304:   FFCR - Formatter and Flush Control Register.
  0xE0040F00:   ITCTRL - Specifies normal or integration mode for the TPIU.
  0xE0040FC8:   TYPE - TPIU Type.

SSPSR - Supported Parallel Port Sizes.

Address:

  Instance 0 Address:   0xE0040000

Description:

Supported Parallel Port Sizes.

Example Macro Usage:

//
// Register access is all performed through the standard CMSIS structure-based
// interface. This includes module-level structure definitions with members and
// bitfields corresponding to the physical registers and bitfields within each
// module. In addition, Ambiq has provided instance-level macros for modules
// that have more than one physical instance and a generic AM_REGVAL() macro
// for directly accessing memory by address.
//
// The following examples show how to use these structures and macros:

// Setting the ADC configuration register...
AM_REGVAL(0x50010000) = 0x1234;              // by address.
ADC->CFG = 0x1234;                           // by structure pointer.
ADCn(0)->CFG = 0x1234;                       // by structure pointer (with instance number).

// Changing the ADC clock...
ADCn(0)->CFG_b.CLKSEL = 0x2;                 // by raw value.
ADCn(0)->CFG_b.CLKSEL = ADC_CFG_CLKSEL_HFRC; // using an enumerated value.

Register Fields:

31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
SWIDTH0
0x1

Bits Name RW Description
0 SWIDTH0 RO Parallel Port Width 1 supported


CSPSR - Current Parallel Port Size.

Address:

  Instance 0 Address:   0xE0040004

Description:

Current Parallel Port Size.

Example Macro Usage:

//
// Register access is all performed through the standard CMSIS structure-based
// interface. This includes module-level structure definitions with members and
// bitfields corresponding to the physical registers and bitfields within each
// module. In addition, Ambiq has provided instance-level macros for modules
// that have more than one physical instance and a generic AM_REGVAL() macro
// for directly accessing memory by address.
//
// The following examples show how to use these structures and macros:

// Setting the ADC configuration register...
AM_REGVAL(0x50010000) = 0x1234;              // by address.
ADC->CFG = 0x1234;                           // by structure pointer.
ADCn(0)->CFG = 0x1234;                       // by structure pointer (with instance number).

// Changing the ADC clock...
ADCn(0)->CFG_b.CLKSEL = 0x2;                 // by raw value.
ADCn(0)->CFG_b.CLKSEL = ADC_CFG_CLKSEL_HFRC; // using an enumerated value.

Register Fields:

31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
CWIDTH
0x1

Bits Name RW Description
31:0 CWIDTH RW One-hot representation of the current port width.

1BIT = 0x1 - Set width to 1.

ACPR - Asynchronous Clock Prescaler.

Address:

  Instance 0 Address:   0xE0040010

Description:

Asynchronous Clock Prescaler.

Example Macro Usage:

//
// Register access is all performed through the standard CMSIS structure-based
// interface. This includes module-level structure definitions with members and
// bitfields corresponding to the physical registers and bitfields within each
// module. In addition, Ambiq has provided instance-level macros for modules
// that have more than one physical instance and a generic AM_REGVAL() macro
// for directly accessing memory by address.
//
// The following examples show how to use these structures and macros:

// Setting the ADC configuration register...
AM_REGVAL(0x50010000) = 0x1234;              // by address.
ADC->CFG = 0x1234;                           // by structure pointer.
ADCn(0)->CFG = 0x1234;                       // by structure pointer (with instance number).

// Changing the ADC clock...
ADCn(0)->CFG_b.CLKSEL = 0x2;                 // by raw value.
ADCn(0)->CFG_b.CLKSEL = ADC_CFG_CLKSEL_HFRC; // using an enumerated value.

Register Fields:

31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
RSVD
0x0
SWOSCALER
0x0

Bits Name RW Description
31:16 RSVD RO RESERVED

15:0 SWOSCALER RW Prescaler value for the baudrate of SWO.

115200 = 0x33 - Set divisor correctly for 115200 baud.

SPPR - Selected Pin Protocol.

Address:

  Instance 0 Address:   0xE00400F0

Description:

Selected Pin Protocol.

Example Macro Usage:

//
// Register access is all performed through the standard CMSIS structure-based
// interface. This includes module-level structure definitions with members and
// bitfields corresponding to the physical registers and bitfields within each
// module. In addition, Ambiq has provided instance-level macros for modules
// that have more than one physical instance and a generic AM_REGVAL() macro
// for directly accessing memory by address.
//
// The following examples show how to use these structures and macros:

// Setting the ADC configuration register...
AM_REGVAL(0x50010000) = 0x1234;              // by address.
ADC->CFG = 0x1234;                           // by structure pointer.
ADCn(0)->CFG = 0x1234;                       // by structure pointer (with instance number).

// Changing the ADC clock...
ADCn(0)->CFG_b.CLKSEL = 0x2;                 // by raw value.
ADCn(0)->CFG_b.CLKSEL = ADC_CFG_CLKSEL_HFRC; // using an enumerated value.

Register Fields:

31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
RSVD
0x0
TXMODE
0x0

Bits Name RW Description
31:2 RSVD RO RESERVED

1:0 TXMODE RW Selects the protocol used for trace output.

PARALLEL = 0x0 - Parallel trace port.
MANCHESTER = 0x1 - Manchester encoded.
NRZ = 0x2 - Non-return-to-zero encoding.
UART = 0x2 - UART encoding.

FFCR - Formatter and Flush Control Register.

Address:

  Instance 0 Address:   0xE0040304

Description:

Formatter and Flush Control Register.

Example Macro Usage:

//
// Register access is all performed through the standard CMSIS structure-based
// interface. This includes module-level structure definitions with members and
// bitfields corresponding to the physical registers and bitfields within each
// module. In addition, Ambiq has provided instance-level macros for modules
// that have more than one physical instance and a generic AM_REGVAL() macro
// for directly accessing memory by address.
//
// The following examples show how to use these structures and macros:

// Setting the ADC configuration register...
AM_REGVAL(0x50010000) = 0x1234;              // by address.
ADC->CFG = 0x1234;                           // by structure pointer.
ADCn(0)->CFG = 0x1234;                       // by structure pointer (with instance number).

// Changing the ADC clock...
ADCn(0)->CFG_b.CLKSEL = 0x2;                 // by raw value.
ADCn(0)->CFG_b.CLKSEL = ADC_CFG_CLKSEL_HFRC; // using an enumerated value.

Register Fields:

31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
RSVD
0x1
ENFCONT
0x0
RSVD
0x0

Bits Name RW Description
31:2 RSVD RO RESERVED

1 ENFCONT RW Enable continuous formatting.

0 RSVD RO RESERVED


ITCTRL - Specifies normal or integration mode for the TPIU.

Address:

  Instance 0 Address:   0xE0040F00

Description:

Specifies normal or integration mode for the TPIU.

Example Macro Usage:

//
// Register access is all performed through the standard CMSIS structure-based
// interface. This includes module-level structure definitions with members and
// bitfields corresponding to the physical registers and bitfields within each
// module. In addition, Ambiq has provided instance-level macros for modules
// that have more than one physical instance and a generic AM_REGVAL() macro
// for directly accessing memory by address.
//
// The following examples show how to use these structures and macros:

// Setting the ADC configuration register...
AM_REGVAL(0x50010000) = 0x1234;              // by address.
ADC->CFG = 0x1234;                           // by structure pointer.
ADCn(0)->CFG = 0x1234;                       // by structure pointer (with instance number).

// Changing the ADC clock...
ADCn(0)->CFG_b.CLKSEL = 0x2;                 // by raw value.
ADCn(0)->CFG_b.CLKSEL = ADC_CFG_CLKSEL_HFRC; // using an enumerated value.

Register Fields:

31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
RSVD
0x0
MODE
0x0

Bits Name RW Description
30:1 RSVD RO RESERVED

1:0 MODE RW Specifies the current mode for the TPIU.

NORMAL = 0x0 - Normal mode.
TEST = 0x1 - Integration test mode.
DATA_TEST = 0x2 - Integration data test mode.

TYPE - TPIU Type.

Address:

  Instance 0 Address:   0xE0040FC8

Description:

TPIU Type.

Example Macro Usage:

//
// Register access is all performed through the standard CMSIS structure-based
// interface. This includes module-level structure definitions with members and
// bitfields corresponding to the physical registers and bitfields within each
// module. In addition, Ambiq has provided instance-level macros for modules
// that have more than one physical instance and a generic AM_REGVAL() macro
// for directly accessing memory by address.
//
// The following examples show how to use these structures and macros:

// Setting the ADC configuration register...
AM_REGVAL(0x50010000) = 0x1234;              // by address.
ADC->CFG = 0x1234;                           // by structure pointer.
ADCn(0)->CFG = 0x1234;                       // by structure pointer (with instance number).

// Changing the ADC clock...
ADCn(0)->CFG_b.CLKSEL = 0x2;                 // by raw value.
ADCn(0)->CFG_b.CLKSEL = ADC_CFG_CLKSEL_HFRC; // using an enumerated value.

Register Fields:

31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
RSVD
0x0
NRZVALID
0x1
MANCVALID
0x1
PTINVALID
0x1
FIFOSZ
0x2

Bits Name RW Description
31:12 RSVD RO RESERVED

11 NRZVALID RO 1 Indicates UART/NRZ support.

10 MANCVALID RO 1 Indicates Manchester support.

9 PTINVALID RO 0 Indicates Parallel Trace support.

8:6 FIFOSZ RO FIFO Size reported as a power of two. For instance, 0x3 indicates a FIFO size of 8 bytes.