CP3BT23 Datasheet, PDF (113/260 Pages) Texas Instruments – CP3BT23 Reprogrammable Connectivity Processor with Bluetooth and Dual CAN Interfaces

ST3 (DIR)
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
Table 45 Buffer Status Section of the CNSTAT Register
ST2 ST1
ST0 (BUSY)
Buffer Status
0
0
0
0
0
RX_NOT_ACTIVE
Reserved for RX_BUSY. (This condition indicates that soft-
1
ware wrote RX_NOT_ACTIVE to a buffer when the data
copy process is still active.)
0
1
0
RX_READY
0
1
1
RX_BUSY0 (Indicates data is being copied for the first time
RX_READY → RX_BUSY0.)
1
0
0
RX_FULL
1
0
1
1
1
1
te ⁰
0
0
0
1
0
le ¹
0
0
1
o ₀
1
1
1
Obs ¹
1
1
RX_BUSY1 (Indicates data is being copied for the second
time RX_FULL → RX_BUSY1.)
0
RX_OVERRUN
1
RX_BUSY2 (Indicates data is being copied for the third or
subsequent times RX_OVERRUN → RX_BUSY2.)
0
TX_NOT_ACTIVE
Reserved for TX_BUSY. (This state indicates that software
1
wrote TX_NOT_ACTIVE to a transmit buffer which is sched-
uled for transmission or is currently transmitting.)
0
TX_ONCE
TX_BUSY0 (Indicates that a buffer is scheduled for trans-
mission or is actively transmitting; it can be due to one of
1
two cases: a message is pending for transmission or is cur-
rently transmitting, or an automated answer is pending for
transmission or is currently transmitting.)
0
TX_RTR (Automatic response to a remote frame.)
1
Reserved for TX_BUSY1. (This condition does not occur.)
0
TX_ONCE_RTR (Changes to TX_RTR after transmission.)
TX_BUSY2 (Indicates that a buffer is scheduled for trans-
mission or is actively transmitting; it can be due to one of
1
two cases: a message is pending for transmission or is cur-
rently transmitting, or an automated answer is pending for
transmission or is currently transmitting.)
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