cxd3220r Sony Electronics, cxd3220r Datasheet - Page 19

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

7) Asynchronous Transmit and Received FIFO Status Registers
These registers can monitor and control the ATF/ARF statuses.
The register address is 1ch and the initial value is 0428_0000h.
Only the Clear ATF bit and Clear ARF bit are for read/write; other bits are for read/write when the regRW bit is
"1" and read only when it is "0".
8) Phy Chip Access Registers
These registers are used for read/write of the contents of the Phy chip Phy register connected to the
CXD3220R.
The register address is 20h and the initial value is 0000_0000h.
27 to 24
23 to 16
11 to 8
3 to 0
7 to 0
Bit
31
30
29
28
27
26
23
22
21
20
19
15
13
Bit
31
30
RdPhy
WrPhy
PhyRegAd
PhyRegData
PhyAdRxReg
PhyDataRxReg
ARFFull
ARFAFull
ARF4Th
ARFDc
ARFAEmpty
ARFEmpty
ATFFull
ATFAFull
ATF4Avail
ATFAEmpty
ATFEmpty
ClearATF
ClearARF
ATAck
Name
Name
The ARF is full when "1" and receive is not possible.
The ARF can receive only one more quadlet when "1".
The ATF can write more than four quadlets of data when "1".
This is the control bit for reading a packet from ARF, and is "1" only for the
first and last quadlets of the packet.
Only one more quadlet of data is written in the ARF when "1".
The ARF is empty when "1" and there is no data to be read.
The ATF is full when "1" and write is not possible.
Only one more quadlet can be written in the ATF when "1".
More than four quadlets of data can be written in the ATF when "1".
The ATF has only one more quadlet of data not transmitted when "1".
The ATF is empty when "1" and there is no data for transmit.
Sync reset of ATF when "1" (Self Clear).
Sync reset of ARF when "1" (Self Clear).
Value of received Ack code. This is fixed when the TxRdy bit becomes "1"
from "0" and the fixed value is maintained till the next Act code is received.
The CXD3220R requests read to the address set in PhyRgAd via the Phy I/F
when "1".
The CXD3220R requests write to the address set in PhyRgAd via the Phy I/F
when "1".
Sets the read/write address of the connected Phy chip Phy register.
Value of data for write to address specified by PhyRegAd.
Value of the read Phy register address during read.
Value of the read Phy register data during read.
– 19 –
Function
Function
CXD3220R