Sundance SMT335E - Manual (Page 16)

Version 1.5 Page 16 of 53 SMT335E SMT375E User Manual
Comm-port Status and Control Register
CP0_STAT 0x03040000 CP3_STAT 0x031C0000
CP1_STAT 0x030C0000 CP4_STAT 0x03240000
CP2_STAT 0x03140000 CP5_STAT 0x032C0000
31–28 27 26 25 24 23–20 19–16 15–12 11-8
IFF IFE OFF OFE IFL OFL
R,0 R,1 R,0 R,1 R,0000 R,1111
7 6 5 4 3 2 1 0
ICPRDY OCPRDY CLRCP IFBM OFBM CLRIF CLROF DIR
R,0 R,1 W,0 RW,0 RW,0 W,0 W,0 R,0
Field Description (flags are active when 1)
0 Reading
DIR
1 Writing
CLROF Write 1 to clear outgoing FIFO
CLRIF Write 1 to clear incoming FIFO
0 Single-word operation
OFBM Output FIFO Burst Mode
1 8-word burst mode operation
0 Single-word operation
IFBM Input FIFO Burst Mode
1 8-word burst mode operation
CLRCP
Reset comm-port: Both FIFOs are cleared and the comm-port interface
is set back to its default direction. Use with caution (see below).
OFL Output FIFO Level: Number of words (0–15) which can be written
OCPRDY Comm-port interface buffer OCPRDY=’1’ if empty
IFL
Incoming FIFO level: Number of words (0–15) available to be read
ICPRDY Comm-port interface buffer; ICPRDY=’0’ if empty
OFE Outgoing FIFO Empty Flag (space is available for writing 16 words)
OFF Outgoing FIFO Full Flag
IFE Incoming FIFO Empty Flag
IFF Incoming FIFO Full Flag (16 words are available to be read)