Texas Instruments C2000 Workshop Guide And Lab Manual

Multichannel Buffered Serial Port (McBSP)
C2000 Microcontroller Workshop - Communications 13 - 17
Definition: Word and Frame
 “Frame” - contains one or multiple words
w0 w1 w2 w3
w4 w5 w6 w7
Frame
Word
w6 w7
D
FS
 Number of words per frame: 1-128
Multi-Channel Selection
Multi-Channel Selection
Ch0-0
Ch0-1
Ch5-0
Ch5-1
Ch27-0
Ch27-1
 Multi-channel mode controlled primarily via two registers:
MCR
Multi-channel Control Reg
(enables Mc-mode)
R/XCER (A-H)
Rec/Xmt Channel Enable Regs
(enable/disable channels)
 Up to 128 channels can be enabled/disabled
C
O
D
E
C
M
c
B
S
P
Frame TDM Bit Stream
Ch0Ch1Ch31
...
0
Ch0Ch1Ch31
...
1
Transmit
&
Receive
only selected
Channels
Multi-channel
 Allows multiple channels (words) to be independently selected for transmit
and receive (e.g. only enable Ch0, 5, 27 for receive, then process via CPU)
 The McBSP keeps time sync with all channels, but only “listens” or “talks”
if the specific channel is enabled (reduces processing/bus overhead)

Texas Instruments C2000 Specifications

General

Brand	Texas Instruments
Model	C2000
Category	Microcontrollers
Language	English