GMS30C7201 Datasheet, PDF (191/352 Pages) Hynix Semiconductor – 60MHz operation frequency Low power consumption

Fast AMBA Peripherals
Bit
Name
2
RAB
3
TFS
4
RFS
5
-
7-6
WST
Description
Receiver Abort
0 - No abort has been detected for the incoming frame
1 - Abort detected during receipt of incoming frame, seven or more ones detected on receive pin,
EOF bit set in receive buffer next to last piece of “good” data received before the abort, interrupt
requested
Transmit buffer Service Request (read-only)
0 - Transmit buffer is full or the transmitter disabled
1 - Transmit buffer is not full and the transmitter is enabled, DMA service request signalled
Receive buffer Service Request (read-only)
0 - Receive buffer is empty or the receiver disabled
1 - Receive buffer is not empty and the receiver is enabled. DMA service request is signalled
unless the receive buffer contains either an error or the final byte in a frame (Indicated by EIF
set).
Reserved
Receive word width status
00 - All four bytes in receive buffer are valid
01 - Least significant byte valid only
10 - Least significant two bytes valid only
11 - Least significant three bytes valid only
Table 12-30: MIr status register 0 (Continued)
12.8.4 MIr status register 1 (MISR1)
MIr status register 1 (MISR1) contains flags and status bits that indicate when the receiver is
synchronized, the transmitter is active, that the transmit buffer is not full, that the receive buffer
is not empty, a transition has been detected on the receive line, and when an end of frame, CRC
error, or underrun error has occurred. All bits within MISR1 are non-interrupting.
Receiver Synchronized Flag (RSY) (read-only)
The receiver synchronized (RSY) flag is a read-only bit that is set when the receiver is
synchronized with the incoming data stream, and is cleared when the receiver logic is in hunt
mode (looking for a flag to achieve bit and frame synchronization), or the receiver is disabled
(RXE=0).
Transmitter Busy Flag (TBY) (read-only)
The transmitter busy (TBY) flag is a read-only bit that is set when the transmitter is actively
transmitting a frame (address, control, data, CRC, start or stop flag), and is cleared when the
transmitter is idle (transmitting flags that are not part of a frame), or the transmitter is disabled
(TXE=0).
Receive Transition Detect Status (RTD) (read/write)
The receive transition detect (RTD) status bit is set whenever the receiver is enabled (RXE=1),
and a positive edge transition is detected on the RXD1 pin.
End of Frame Flag (EOF) (read-only)
The end of frame flag (EOF) is set when the last byte of data within a frame (including aborted
frames) resides within the bottom entry of the receive buffer.
GMS30C7201 Data Sheet
12-37