Shifter Buffer N Register (Flexio_Shiftbufn) - NXP Semiconductors MKL27Z128VFM4 Reference Manual

Table of Contents

Memory Map and Registers

FLEXIO_SHIFTCFGn field descriptions (continued)

This field is reserved.

This read-only field is reserved and always has the value 0.

Shifter Start bit

For SMOD=Transmit, this field allows automatic start bit insertion if the selected timer has also enabled a

For SMOD=Receive or Match Store, this field allows automatic start bit checking if the selected timer has

also enabled a start bit.

Start bit disabled for transmitter/receiver/match store, transmitter loads data on enable

Start bit disabled for transmitter/receiver/match store, transmitter loads data on first shift

Transmitter outputs start bit value 0 before loading data on first shift, receiver/match store sets error

flag if start bit is not 0

Transmitter outputs start bit value 1 before loading data on first shift, receiver/match store sets error

flag if start bit is not 1

39.3.13 Shifter Buffer N Register (FLEXIO_SHIFTBUFn)

Address: 4005_F000h base + 200h offset + (4d × i), where i=0d to 3d

Shift Buffer

Shift buffer data is used for a variety of functions depending on the SMOD setting:

For SMOD=Receive, Shifter data is transferred into SHIFTBUF at the expiration of Timer.

For SMOD=Transmit, SHIFTBUF data is transferred into the Shifter before the Timer begins.

For SMOD=Match Store/Continuous, SHIFTBUF[31:16] contains the data to be matched with the Shifter

contents. The Match is checked either continuosly (Match Continous mode) or when the Timer expires

(Match Store mode). SHIFTBUF[15:0] can be used to mask the match result (1=mask, 0=no mask). In

Match Store mode, Shifter data [31:16] is written to SHIFTBUF[31:16] whenever a match event occurs.

FLEXIO_SHIFTBUFn field descriptions

KL27 Sub-Family Reference Manual , Rev. 5, 01/2016

Freescale Semiconductor, Inc.