Information

UARTx_WB field descriptions (continued)
Field Description
Size of the basic randomizing window in bit periods after Beta1 time period.
48.3.42 UART CEA709.1-B Status Register (UARTx_S3)
Address: Base address + 2Bh offset
Bit 7 6 5 4 3 2 1 0
Read
PEF WBEF
ISD
PRXF PTXF PCTEF PSF TXFF
Write
Reset
0 0 0 0 0 0 0 0
UARTx_S3 field descriptions
Field Description
7
PEF
Preamble Error Flag
Indicates that the received preamble has an error. If the received preamble length is greater than or less
than the transmit preamble length, the preamble error flag is asserted. This flag is cleared by writing 1.
0 Preamble is correct.
1 Preamble has an error.
6
WBEF
Wbase Expired Flag
Indicates that the Wbase time period has expired after beta1 time slots. This flag is cleared by writing 1.
0 WBASE time period has not expired.
1 WBASE time period has expired after beta1 time slots.
5
ISD
Initial Sync Detect
Indicates that initially, a valid one and a line code violation is detected. This flag is cleared by deasserting
EN709 bit.
0 Initial sync is not detected.
1 Initial sync is detected.
4
PRXF
Packet Received Flag
Indicates that complete packet is received. This flag is cleared by writing 1.
0 Packet is not received.
1 Packet is received.
3
PTXF
Packet Transmitted Flag
Indicates that complete packet is transmitted. This flag is cleared by writing 1. In case TX packet gets
aborted due to FIFO becoming empty or an overflow, packet transmitted flag will still be generated.
0 Packet transmission is not complete.
1 Packet transmission is complete.
Table continues on the next page...
Memory map and registers
K20 Sub-Family Reference Manual, Rev. 1.1, Dec 2012
1316
Preliminary
Freescale Semiconductor, Inc.
General Business Information