ctrlr1

         Control Register 1
This register exists only when the DW_apb_ssi is configured as a
master device. When the DW_apb_ssi is configured as a serial slave,
writing to this location has no effect; reading from this location
returns 0. Control register 1 controls the end of serial transfers
when in receive-only mode. 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 0xFFDA4004
i_spim_1_spim 0xFFDA5000 0xFFDA5004

Offset: 0x4

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

ndf

RW 0x0

ctrlr1 Fields

Bit Name Description Access Reset
15:0 ndf 
Number of Data Frames.
When TMOD = 10 or TMOD = 11, this register field sets the number of data frames to
be continuously received by the DW_apb_ssi. The DW_apb_ssi continues
to receive serial data until the number of data frames received is
equal to this register value plus 1, which enables you to receive up
to 64 KB of data in a continuous transfer. When the DW_apb_ssi is
configured as a serial slave, the transfer continues for as long as
the slave is selected. Therefore, this register serves no purpose and
is not present when the DW_apb_ssi is configured as a serial slave.
 RW 0x0