TMS320VC5409_16 Datasheet, PDF (34/93 Pages) Texas Instruments – Digital Signal Processor

Functional Overview
Table 3−7. Pin Control Register (PCR) Bit Field Description (Continued)
BIT
NAME
FUNCTION
5
DX STAT DX pin status. DX STAT reflects value on DX pin when it is selected as a general-purpose output.
4
DR STAT DR pin status. DR STAT reflects value on DR pin when it is selected as a general-purpose input.
Receive/Transmit frame synchronization polarity.
3
FSXP
2
FSRP
FS(R/X)P = 0 Frame synchronization pulse FS(R/X) is active high
FS(R/X)P = 1 Frame synchronization pulse FS(R/X) is active low
Transmit clock polarity
1
CLKXP
CLKXP = 0
Transmit data sampled on rising edge of CLKR
CLKXP = 1 Transmit data sampled on falling edge of CLKR
Receive clock polarity
0
CLKRP _{CLKRP = 0}
Receive data sampled on falling edge of CLKR
CLKRP = 1 Receive data sampled on rising edge of CLKR
34 _SPRS082F
April 1999 − Revised October 2008