Comm-Port Status And Control Register - Sundance Spas SMT335E User Manual

Version 3.0

Comm-port Status and Control Register

31–28 27
IFF IFE
R,0
7 6
ICPRDY OCPRDY
R,0 R,1
Field Description (flags are active when 1)
0
DIR
1
CLROF Write 1 to clear outgoing FIFO
CLRIF Write 1 to clear incoming FIFO
OFBM Output FIFO Burst Mode
IFBM Input FIFO Burst Mode
Reset comm-port: Both FIFOs are cleared and the comm-port interface
CLRCP
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)
CP0_STAT 0x03040000
CP1_STAT 0x030C0000
CP2_STAT 0x03140000
26 25 24
OFF OFE
R,1 R,0 R,1
5
CLRCP IFBM
W,0 RW,0
Reading
Writing
Page 16 of 53
23–20 19–16
IFL
R,0000
4 3
OFBM CLRIF
RW,0
0 Single-word operation
1 8-word burst mode operation
0 Single-word operation
1 8-word burst mode operation
SMT335E SMT375E User Manual
CP3_STAT 0x031C0000
CP4_STAT 0x03240000
CP5_STAT 0x032C0000
15–12
OFL
R,1111
2 1
CLROF
W,0 W,0
11-8
0
DIR
R,0