si4430 Silicon Laboratories, si4430 Datasheet - Page 116

• Manufacturer Part Number: si4430
• Description: Si4430 Ism Transceiver
• Manufacturer: Silicon Laboratories

Register 3Ch. Transmit Header 1
Register 3Dh. Transmit Header 0
Register 3Eh. Packet Length
Si4430
Reset value = 00000000
Reset value = 00000000
Reset value = 00000000
Check Header bytes 3 to 0 are checked against the corresponding bytes in the Received Header if the check is
enabled in “Register 31h. EZMAC
116
Name
Name
Name
Type
Type
Type
Bit
Bit
Bit
7:0
7:0
7:0
Bit
Bit
Bit
txhd[15:8]
pklen[7:0]
txhd[7:0]
Name
Name
Name
D7
D7
D7
Transmit Header 1.
2
Transmit Header 0.
1
Packet Length.
The value in the pklen[7:0] register corresponds directly to the number of bytes in the
Packet. For example pklen[7:0] = ‘00001000’ corresponds to a packet length of 8 bytes.
The maximum packet length is pklen[7:0] = ‘11111111’, a 255 byte packet. Writing 0 is
possible, in this case we do not send any data in the packet. During RX, if fixpklen = 1,
this will specify also the Packet Length for RX mode.
nd
st
D6
D6
D6
byte of the header to be transmitted.
byte of the header to be transmitted.
®
Status,” on page 110.
D5
D5
D5
Preliminary Rev. 0.4
D4
D4
D4
txhd[15:8]
pklen[7:0]
txhd[7:0]
R/W
R/W
R/W
Function
Function
Function
D3
D3
D3
D2
D2
D2
D1
D1
D1
D0
D0
D0