cxd3220r Sony Electronics, cxd3220r Datasheet - Page 21

• Manufacturer Part Number: cxd3220r
• Description: Ieee1394 Link/transaction Layer Controller Lsi For Sbp-2
• Manufacturer: Sony Electronics

12) ADP4 Registers
These registers are used for setting of the ADP.
The register address is 30h and the initial value is 0000_0000h.
13) ADP Control Registers
These registers are used for controlling the ADP.
The register address is 34h and the initial value is 0000_0000h.
26 to 24
23 to 20
18 to 16
15 to 0
31
27
19
Bit
Bit
2
1
0
notify (n)
direction (d)
spd
max_payload
p
page_size
xfer_length
ADPreset
ADPstop
ADPgo
Name
Name
This is the notify bit of the ORB format. This has not effect on this IC. Please
use it as memory.
This is used to determine the direction of ADP transfer.
This is used to set the direction value of the ORB. (Since ADP transmission
and reception is switched with this bit, only perform writing to this register
after the series of Transactions with the ADP have been completed and the
ADP is not operating.)
This is the transfer rate of the 1394 serial bus.
This bit is used to set the spd value of the ORB.
This indicates the maximum data_length with 2^ (max_payload + 2).
It is used to set the max_payload value of the ORB. A value of 8 is set when
a value larger than 8 is set with the CXD3220R.
This is the page_table_present bit.
This is set to "1" when using the page_table, and set to "0" when not using.
The device enters Mode2 when "1".
This is used to set the p value of the ORB.
This bit represents the data_length of one page.
page_length is represented with 2^ (page_size + 8).
It is used to set the page_size value of the ORB.
This represents the data buffer length in Mode0 or 1, and is used to set the
data_size value of the ORB. In Mode2, it represents the segment length, and
is used to set the Segment_Length value of the Page Table. (Do not start the
ADP when xfer_length = 0.)
Returns the ADP to the initial state. Clears the ADP status register.
This bit is set to "1" when stopping the ADP.
The ADP is then stopped after it has normally completed the Transaction of
the packet currently loaded in the ADPTF or an error has occurred, after
which this bit is cleared.
This bit is set to "1" when starting the ADP.
The ADP is then stopped after it has normally completed or an error has
occurred, after which this bit is cleared.
0: Reception of data from the initiator to this link.
1: Transmission of data from this link to the initiator.
0: S100
1: S200
2 to 7: Reserved (Do not set to these values.)
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Function
Function
CXD3220R