Hitachi EH-150 - Connection n Communication Status Register (CnCSR)

Chapter 8 Register Structure
Connection n communication status register (CnCSR) n = 1 to 6
Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
+H7
- - - - - - - - -
CRO1 SMF1 - ERF1 RXC1 TXC1 OPC1
:
+HC
- - - - - - - - -
CRO6 SMF6 - ERF6 RXC6 TXC6 OPC6
The connection condition of each connection is shown in this area.
Bit 15-7: Reserved
These bits are reserved. Normally "0" is set.
Bit 6: Close request from other station flag (CRO[6:1])
In case close mode bit(CM[6:1]) of Close mode control register(CMCR) is 1, when there is a close request from
other station, this bit is set 1.
When own station executes close procedure and connection is closed, system clear 0.
In case close mode bit(CM[6:1]) of Close mode control register(CMCR) is 0, this bit is always 0.
Bit6: CRO [6:1] Description
0 There is no close request.
1 There is a close request from other station.
Bit 5: Send mode flag (SMF[6:1])
These flags show the specified condition of send mode whether Cyclic or Event for each connection.
Bit5: SMF[6:1] Description
0 Cyclic send mode.
1 Event send mode.
Bit 4: Reserved
This bit is reserved. Normally "0" is set.
Bit 3: Exclusive receive control flag (ERF[6:1])
These flags show the specified condition of exclusive receive control whether enable or disable.
Bit3: ERF[6:1] Description
0 Exclusive receive control is disable.
1 Exclusive receive control is enable.
Bit 2: Receive complete bit (RXC[6:1])
These bits are set at below condition.
- Automatic receiving mode is
optional mode, and receive area refresh execute bit(ARE[6:1]) of Ready receive
control register(RDCR) is "1".
These bits are not changed during
normal mode of Automatic Receiving mode.
Bit2: RXC[6:1] Description
0 Receive not completed.
1 Receive completed.
Bit 1: Transmit complete bit (TXC[6:1])
These bits show the condition of data transmit.
Bit1: TXC[6:1] Description
0 Transmit not completed
1 Transmit completed.
Bit 0: Open condition bit (OPC[6:1])
These bits show the open condition of the connection.
Bit0: OPC[6:1] Description
0 Open not completed. (Connection is not established)
1 Open completed. (Connection is established)
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