AMIS-49587_15 Datasheet, PDF (29/56 Pages) ON Semiconductor – Power Line Carrier Modem

AMIS−49587
Table 27. OVERVIEW FUNCTIONALITY LOCAL PORT
Port
RX_DATA
Function
Data reception
Value
10 Hz
Explanation
Waiting for configuration
CRC
0
1
CRC OK
0
After Synchro Confirm Time−out
Research of synchronization
1
During the pause between 2 timeslots when a correct
frame is received
TX_DATA /
TX_DATA
0
PRE_SLOT
1
PRE_SLOT
0
1
Transmit of f_S
Transmit of f_M
See Figure 16: Timing Signals
See Figure 16: Timing Signals
Remark
Output is oscillating
See paragraph Send
and Receive
Network Data with
the AMIS−49587
R_CONF[7] = 1
R_CONF[7] = 0
6.4.2 Serial Communication Interface (SCI)
The Serial Communication Interface allows
asynchronous communication. It can communicate with a
UART = Universal Asynchronous Receiver Transmitter,
ACIA = Asynchronous Communication Interface Adapter
and all other chips that employ standard asynchronous serial
communication. The serial communication interface has
following characteristics:
♦ Half duplex.
♦ Standard NRZ format.
♦ Start bit, 8 data bits and 1 stop bit.
♦ Hardware programmable baud−rate (4800, 9600,
19200 and 38400 baud).
♦ 0−5 V levels with open drain for TxD.
♦ 0−5 V levels for RxD and T_REQ.
AMIS− 49587
ARM
Risc
Core
Serial
Comm.
Interface
Local Port
Communication Controller
TxD
RxD
T_REQ
BR0
BR1
RX _DATA
CRC
TX_DATA /
PRE _SLOT
Application
Micro
Controller
Figure 24. Connection to the Application Microcontroller
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