
MD8412B
Ver 1.10
FUJIFUILM MICRODEVICES CO., LTD.
23
Bit 0
SyncEn
: Sync Enable bit (RW- Initial value: 0b)
= Packet transmission/reception is effected regardless of the contents of StartSync and StopSync. Dur-
ing AutoMode transmission, contents of the Sync register are reflected at any time in the Sync area of
the packet header.
= In the Receive mode, packet reception is controlled with the channel number of the above setting plus
StartSync and StopSync. During AutoMode transmission, contents of Start Sync are entered in the
Sync field of the packet header to be transmitted shortly after the ITSTART terminal or the ITStart
register has been turned active. Since then, contents of Sync are entered in StopSync shortly after
ITSTART is turned non-active.
0
1
Bit 1
IsoRxEn
: Isochronous Receive Enable bit (RW- Initial value: 0b)
= Isochronous reception disabled
= Isochronous reception enabled
Setting is made to define whether isochronous reception is enabled or not.
0
1
Bit 7~4
StopSync
: Stop Sync bit (RW- Initial value: 00h)
When SyncEn=1, reception control is effected with the Sync field values of this bit and packet. Once packet
reception is started with StartSync and after a packet has been received, with which its register value coincides
with the Sync field of a packet of the set channel number, packet reception is suspended thereafter. When Syn-
cEn="1b" in the auto-transmission mode, and if transmission is stopped by the ITSTART terminal or the ITStart
register, this value is written in the Sync field of the last packet received shortly before stoppage.
Bit 8~11
StartSync
: Start Sync bit (RW- Initial value: 00h)
When SyncEn=1, reception control is effected with the Sync field value of this bit and packet. Reception is
started again with a packet whose register value coincides with the Sync field value of the packet with the preset
channel number. When SyncEn="1b" the auto-transmission mode, and when transmission is started with the
ITSTART terminal or the ITStart register, this value is written in the Sync field of the packet to be sent first.
Bit 15~12
Sync
: Sync bit (RW- Initial value: 00h)
For "010b" and "100b" in IsoMode, in the isochronous transmission auto-mode, this register sets up a value
so that the MD8412B can input this value in the Sync field of the packet header. In other modes, this register
remains to be disabled. With SyncEn="0b" this value is written at any time. When SyncEn="1b" this value is
written in a packet other than the start/end packet, with the ITSTART terminal or the ITStart register.
Bit 17~16
Speed
: Speed bit (RW- Initial value: 00b)
= Transmission at 100Mbps
= Transmission at 200Mbps
= Transmission at 400Mbps
= Reserved
In the transmission mode, the transfer speed is set up for transmission to be effected over the cable. In the
reception mode, this register remains to be disabled.
00
01
10
11
Bit 29~24
Channel
: Channel bit (RW- Initial value: 00h)
In auto-transmission mode, a channel is specified for the isochronous packet. The channel number set here is
loaded in the packet header for transmission. In the reception mode, an isochronous channel intended for recep-
tion in both modes is set up. The setting range is from 0 to 63.
Bit 31~30
Tag
: Tag bit (RW- Initial value: 00h)
In auto-transmission mode, a tag is specified for an isochronous packet. The setting range is from 0 to 3.
The relationship between contents of the IsoMode register and this configuration register group is shown
below.