Ficp Status Register 1 (Icsr1); Icsr1 Bit Definitions - Intel PXA255 Developer's Manual

11.3.6

FICP Status Register 1 (ICSR1)

ICSR1, shown in
transmitter is active, the transmit FIFO is not full, the receive FIFO is not empty, and that an EOF,
CRE, or underrun error has occurred.
This is a read-only register. Ignore reads from reserved bits.
.
Table 11-7. ICSR1 Bit Definitions
0x4080_0018
Bit 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9
Reset 0 0 0 0 0 0
Bits Name
[31:7]
6 ROR
5 CRE
4 EOF
3
2 RNE
1
0 RSY
Intel® PXA255 Processor Developer's Manual
Table 11-7, contains flags that indicate that the receiver is synchronized, the
Fast Infrared Communication Port
Status Register 1 (ICSR1)
reserved
0 0 0 0 0 0 0
— reserved
Receive FIFO overrun (read-only).
0 = Receive FIFO has not experienced an overrun.
1 = Receive logic attempted to place data into receive FIFO while it was full. Data received
after the FIFO is full are lost.
Each time an 11-bit value reaches the bottom of the receive FIFO, bit 10 from the last FIFO
entry is transferred to the ROR bit.
CRC error (read-only).
0 = CRC not encountered yet or no CRC check errors encountered in the receipt of data.
1 = CRC calculated on the incoming data. Does not match CRC value contained within
the received frame.
Each time an 11-bit value reaches the bottom of the receive FIFO, bit 9 from the last FIFO
entry is transferred to the CRE bit.
End of frame (read-only).
0 = Current frame has not completed.
1 = The value at the bottom of the receive FIFO is the last byte of data within the frame,
including aborted frames.
Each time an 11-bit value reaches the bottom of the receive FIFO, bit 8 from the last FIFO
entry is transferred to the EOF bit.
Transmit FIFO not full (read-only).
TNF
0 = Transmit FIFO is full.
1 = Transmit FIFO is not full (no interrupt generated).
Receive FIFO not empty (read-only).
0 = Receive FIFO is empty.
1 = Receive FIFO is not empty (no interrupt generated).
Transmitter busy flag (read-only).
0 = Transmitter is idle (continuous preambles) or disabled.
TBY
1 = Transmit logic is currently transmitting a frame (address, control, data, CRC, or start/
stop flag). No interrupt generated.
Receiver synchronized flag (read-only).
0 = Receiver is in hunt mode or is disabled.
1 = Receiver logic is synchronized with the incoming data (no interrupt generated).
Fast Infrared Communication Port
0 0 0 0 0 0 0 0
Description
Fast Infrared Communication Port
8 7 6 5 4 3
0 0 0 0 0 0 0 1
2 1 0
0 0 0
11-15