AMIS49587C5871RG ON Semiconductor, AMIS49587C5871RG Datasheet - Page 39

• Manufacturer Part Number: AMIS49587C5871RG
• Description: IC MODEM PLC 50/60MHZ 28PLCC
• Manufacturer: ON Semiconductor

Specifications of AMIS49587C5871RG

• Baud Rates: Selectable
• Interface: SCI
• Voltage - Supply: 3 V ~ 3.6 V
• Mounting Type: Surface Mount
• Package / Case: 28-PLCC
• Number Of Transmitters: 1
• Power Supply Requirement: Single
• Package Type: PLCC
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 28
• Operating Temperature (max): 70C
• Dual Supply Voltage (typ): Not RequiredV
• Dual Supply Voltage (max): Not RequiredV
• Dual Supply Voltage (min): Not RequiredV
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Data Format: -
• Lead Free Status / Rohs Status: Compliant

DESCRIPTION
sub−layer. These data (included into local frames) contain
information about the DLC frame transmission on the mains
(Initial credit, current credit, delta credit, local and
destination MAC addresses) and the data field. Other
information for transmission such as the Preamble, the Start
Sub−frame Delimiter, the Frame Indicator and the Frame
Check Sequence are directly managed by the MAC
THE COMMANDS AVAILABLE
MA_DATA_Request (Tag 51h)
Description: The MA_Data_Request is sent from the base micro local LLC sub−layer to the AMIS−49587 local MAC
sub−layer to request a DLC frame transmission. This request must be received by the AMIS−49587 in the time−slot preceding
the transmitting one.
MA_DATA_Confirm (Tag 52h)
Description: The MA_DATA_Confirm is sent from AMIS−49587 to a base micro (SLAVE or MASTER) either as positive
acknowledgment when a MA_DATA_Request has successfully been transmitted by the physical layer, or as negative
acknowledgment when the transmission has been refused. The positive acknowledgment is sent after the frame transmission
on the mains and before the beginning of the repetition (if the credit is higher than zero). The Transmission_Status byte contains
a value corresponding at this positive or negative acknowledgment. The different values for the Transmission_Status field are
described in the Table 45: Transmission Status.
Table 36. DESCRIPTION OF THE MAC_FRAME FIELD
Initial Credit
Current Credit
Delta Credit
Source Address
Destination Address
Pad length
M_sdu
Syntax:
Syntax:
The local communication exchanges data with the MAC
AMIS−49587
Base Micro
Initiator
Initiator
Field name
Frame Format :
Frame Format :
<STX>
<STX>
MA_Data_Request (MAC_Frame)
Command (arguments)
12 bits b23−b12
up to 242 bytes
MA_Data_Confirm (Transmission_Status)
12 bits b11−b0
Master/Slave
3 bits b7−b5
3 bits b4−b2
2 bits b1,b0
Length
Length
Length
1 byte
Command (arguments)
Master/Slave
< MA_Data_Confirm >
MEDIUM ACCESS CONTROL
< MA_Data_Request >
000h to FFFh
000h to FFFh
Not used
Not used
0h to 7h
0h to 7h
0h to 3h
Value
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sub−layer and the PHYsical layer. In case of transmission
from AMIS−49587 to the mains, if necessary, the MAC
sub−layer will separate the frame into one or several
sub−frame(s) (maximum 7 sub−frames). In case of frame
reception made up of several sub−frames, the AMIS−49587
will send back the complete frame (without Pre, SSD, FI,
FCS) to the local communication after the last sub−frame
reception and only if the frame is correct and dedicated for
this application.
Initial Credit
Current Credit = Initial Credit
Delta Credit = Received Delta Credit (Slave) = 0 (Master)
Slave Mode (Filled by MAC layer)
Master Mode
Destination MAC address of the target station DLC
Filled by MAC layer
MAC service data unit
Transmission_Status
MA_Data_Confirm (Transmission_Status)
MAC_Frame
Possible Response
Description
Possible Response
CHK
CHK