Initializing Module In Master/Slave Modes; Baud Rate Settings - NXP Semiconductors freescale KV4 Series Reference Manual

Table of Contents

Initialization/application information

1. Halt it by setting MCR[HALT].

2. Clear the transmit and receive FIFOs by writing a 1 to the CLR_TXF and CLR_RXF

bits in MCR.

3. Set the appropriate mode in MCR[MSTR] and enable it by clearing MCR[HALT].

44.6.3 Initializing Module in Master/Slave Modes

Once the appropriate mode in MCR[MSTR] is configured, the module is enabled by

clearing MCR[HALT]. It should be ensured that module Slave is enabled before enabling

it's Master. This ensures the Slave is ready to be communicated with, before Master

initializes communication.

The following table shows the baud rate that is generated based on the combination of the

baud rate prescaler PBR and the baud rate scaler BR in the CTARs. The values calculated

assume a 100 MHz protocol frequency and the double baud rate DBR bit is cleared.

The clock frequency mentioned above is given as an example in

this chapter. See the clocking chapter for the frequency used to

drive this module in the device.

Table 44-45. Baud rate values (bps)

Table continues on the next page...

KV4x Reference Manual, Rev. 2, 02/2015

Baud rate divider prescaler values

Freescale Semiconductor, Inc.