mwcr
Microwire Control Register.
This register controls the direction of the data word for the half-duplex
Microwire serial protocol. It is impossible to write to this register
when the DW_apb_ssi is enabled. The DW_apb_ssi is enabled and disabled by
writing to the SSIENR register.
| Module Instance | Base Address | Register Address |
|---|---|---|
| i_spim_0_spim | 0xFFDA4000 | 0xFFDA400C |
| i_spim_1_spim | 0xFFDA5000 | 0xFFDA500C |
Offset: 0xC
Access: RW
Important: The value of a reserved bit must be maintained in software. When you modify registers containing reserved bit fields, you must use a read-modify-write operation to preserve state and prevent indeterminate system behavior.
| Bit Fields | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 |
Reserved |
|||||||||||||||
| 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
Reserved |
mhs RW 0x0 |
mdd RW 0x0 |
mwmod RW 0x0 |
||||||||||||
mwcr Fields
| Bit | Name | Description | Access | Reset | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 2 | mhs | Microwire Handshaking. Relevant only when the DW_apb_ssi is configured as a serial-master device. When configured as a serial slave, this bit field has no functionality. Used to enable and disable the busy/ready handshaking interface for the Microwire protocol. When enabled, the DW_apb_ssi checks for a ready status from the target slave, after the transfer of the last data/control bit, before clearing the BUSY status in the SR register. 0: handshaking interface is disabled 1: handshaking interface is enabled
|
RW | 0x0 | ||||||
| 1 | mdd | Microwire Control. Defines the direction of the data word when the Microwire serial protocol is used. When this bit is set to 0, the data word is received by the DW_apb_ssi MacroCell from the external serial device. When this bit is set to 1, the data word is transmitted from the DW_apb_ssi MacroCell to the external serial device.
|
RW | 0x0 | ||||||
| 0 | mwmod | Microwire Transfer Mode. Defines whether the Microwire transfer is sequential or non-sequential. When sequential mode is used, only one control word is needed to transmit or receive a block of data words. When non-sequential mode is used, there must be a control word for each data word that is transmitted or received. 0: non-sequential transfer 1: sequential transfer
|
RW | 0x0 |