rpc2a-000-dil Radiometrix Ltd, rpc2a-000-dil Datasheet - Page 8

• Manufacturer Part Number: rpc2a-000-dil
• Description: Uhf Radio Packet Controller
• Manufacturer: Radiometrix Ltd

figure 8: RX upload timing diagram
The sequence for a byte transfer from the RPC2A to the HOST (i.e. RX upload) is asynchronous and
proceeds as follows :-
1.
2.
3.
4.
Repeat steps 1-4 with MS nibble.
Notes:
2.2 H
2.2.1 T
The first byte of a RPC2A <> HOST packet transfer is always the C
control the transfer and contains information about the type of packet, number of bytes to be
transferred, memory address, read/write bit etc. Bit 7 of the control byte is the Packet Type flag, PT, it
determines the class of transfer and the interpretation of the other bits in the control byte.
Radiometrix Ltd, RPC2A
The RPC2A will turn off it's data bus drivers after the entire packet has been uploaded to the HOST.
See Appendix B and C. for example RPC2A driver subroutines.
OST
HE
EAD A BYTE FROM THE
RPC2A will assert RX Request line low to initiate transfer
Host pulls RX Accept low (i.e. request is accepted by the host)
RPC2A will turn on it's bus drivers, place LS nibble onto data lines
and negate RX Request (set to 1)
Host reads the data and negates RX Accept (i.e. data has been accepted)
<> RPC2A P
C
ONTROL
B
YTE
ACKET
F
ORMAT
ONTROL
B
YTE
. This byte is used to
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