Acia Command Register - Yamaha Mio Service Manual

7
PNC1 PNC0
7
0
0
1
1
3
0
0
1
1
Note
* The transmitter is disabled immediately. The receiver is disabled but will first complete receiving
the byte in process.
MIO Service Manual
Table 5-2. ACIA Command Register
6 5
PMC
PME REM
Bits 7-6 Parity Mode Control (PMC)
6
0 Odd parity transmitted/received.
1 Even parity transmitted/received.
0 Mark parity bit transmitted, parity check disabled.
1 Space parity bit transmitted, parity check disabled.
Bit 5 Parity Mode Enable (PME)
0 Parity mode disabled — no parity bit transmitted.
1 Parity mode enabled.
Bit 4 Receiver Echo Mode (REM)
0 Receiver normal mode.
1 Receiver echo mode — bits 2 and 3 must be zero
for receiver echo mode, RTS will be true.
Bit 3-2 Transmitter Interrupt Control (TIC)
2
0 RTS = false, transmitter disabled.
1 RTS = true, transmit interrupt enabled.
0 RTS = true, transmit interrupt disabled.
1 RTS = true, transmit interrupt disabled,
and transmit break on TxD.
Bit 1 Receiver Interrupt Request Disabled (IRD)
0 IRQ- enabled (receiver)
1 IRQ- disabled (receiver)
Bit 0 Data Terminal Ready (DTR)
0 Data terminal not ready (DTR false)*.
1 Data terminal ready (DTR true).
4 3 2
TIC1 TIC0
1 0
IRD DTR
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