
Counter Description
D
Bad Message Counter. The MC³ does not understand
the incoming telegram.
E
Communication Interrupts Counter. Increments for every
character transmitted or received.
F
UART Status Register
States, IIR
IIR, UART Interrupt Identification Register
Value Description
0
Modem status changed
1
No interrupt pending
2
Transmitter buffer empty
3
No interrupt pending
4
Receiver buffer full
5
No interrupt pending
6
Receiver buffer full and receive character error
7
No interrupt pending
States, LSR
UART Line Status Register, bit encoded
Bit Description
Bit 7 Not used.
Bit 6 Transmitter Empty
1 - No byte in transmitter hold or transmitter shift register
0 - One byte in transmitter hold or transmitter shift register
Bit 5 Transmitter Buffer Empty
1 - no byte in Transmitter Hold Register
0 - one byte in Transmitter Hold Register
Bit 4 Break.
1 – Break Detected
0 - No Break Detected
Bit 3 Framing Error
1 – Framing Error Detected
0 - No Framing Error Detected
Bit 2 Parity Error
1 – Parity Error Detected
0 - No Parity Error Detected
Bit 1 Overrun Error
1 – Overrun Error Detected
0 - No overrun error Detected
Bit 0 Receive Data Ready
1 - Received data in receiver buffer register
0 - No Received Data
States, RX
Receiver Driver State
Value Description
0
Waiting for start char
35.00.EX O&M Manual
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Содержание MC3 35.00.EX
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