Linear Technology LTC6804-1 - Page 48

LTC6804-1/LTC6804-2
48
680412fc
For more information www.linear.com/LTC6804-1
operaTion
Table 27. Broadcast/Address Poll Command
8 8 8 8
CMD0 CMD1 PEC0 PEC1 Poll Data
Table 28. Broadcast Write Command (LTC6804-1)
8 8 8 8 8 8 8 8 8 8
CMD0 CMD1 PEC0 PEC1 Data Byte Low … Data Byte High PEC0 PEC1 Shift Byte 1 … Shift Byte n
Table 29.Broadcast/Address Write Command (LTC6804-2)
8 8 8 8 8 8 8 8
CMD0 CMD1 PEC0 PEC1 Data Byte Low … Data Byte High PEC0 PEC1
Table 30. Broadcast Read Command (LTC6804-1)
8 8 8 8 8 8 8 8 8 8
CMD0 CMD1 PEC0 PEC1 Data Byte Low … Data Byte High PEC0 PEC1 Shift Byte 1 … Shift Byte n
Table 31. Address Read Command (LTC6804-2)
8 8 8 8 8 8 8 8
CMD0 CMD1 PEC0 PEC1 Data Byte Low … Data Byte High PEC0 PEC1
Table 32. Broadcast Command Format
NAME RD/WR BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0
CMD0 WR 0 0 0 0 0 CC[10] CC[9] CC[8]
CMD1 WR CC[7] CC[6] CC[5] CC[4] CC[3] CC[2] CC[1] CC[0]
Table 33. Address Command Format
NAME RD/WR BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0
CMD0 WR 1 a3* a2* a1* a0* CC[10] CC[9] CC[8]
CMD1 WR CC[7] CC[6] CC[5] CC[4] CC[3] CC[2] CC[1] CC[0]
*ax is Address Bit x
Command Format: The formats for the broadcast and
address commands are shown in Table 32 and Table 33
respectively. The 11-bit command code CC[10:0] is the
same for a broadcast or an address command. A list of
all the command codes is shown in Table 34. A broadcast
command has a value 0 for CMD0[7] through CMD0[3].
An address command has a value 1 for CMD0[7] followed
by the 4-bit address of the device (a3, a2, a1, a0) in bits
CMD0[6:3]. An addressed device will respond to an address
command only if the physical address of the device on
pins A3 to A0 match the address specified in the address
command. The PEC for broadcast and address commands
must be computed on the entire 16-bit command (CMD0
and CMD1).
Commands
Table 34 lists all the commands and its options for both
LTC6804-1 and LTC6804-2