MB86296 Datasheet, PDF (193/352 Pages) Fujitsu Component Limited. – PCI Graphics Controller Specification

FUJITSU LIMITED PRELIMINARY AND CONFIDENTIAL
SID (Serial Interface Data)
Register
address
HostBaseAddress + 00B4H
Bit number 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Bit field name
Reserved
TLS
RWD
R/W
R0
RW
RW
Initial value
0
00
0
0
This register is used to write/read serial interface data, enable a transfer and monitor a transfers
progress.
Bit 0 to
Bit 7
Bit 15 to
Bit 8
Bit 16
Bit 17
RWD (Read/Write Data)
When written to specifies the serial output data. When read it contains the serial interface
input data. Note that data will be shifted out top bit (bit 7) first down to the bottom bit (bit 0)
last. Read data will be shifted in to the bottom bit and shifted up by by each bit of the
transfer. For transfer of length 8 this will yield consistent read/write data. For transfers of
less than 8 bits then identical read and write data will appear different.
TLS (Transfer Length/Status)
Specifies the length of a transfer and can be used to monitor its status. For each bit of a
transfer this field is shifted up by one until it is “00000000b”. For example, to specify a
transfer of 8 bits “00000001b” should be written. To specify a transfer of 3 bits “00100000”
should be written.
FS (Force Strobe)
For a single transfer this field can be used to override settings in the SIC register. If set to
“1b” then a strobe will be done with a length specified in the FSL field.
FSL (Force Strobe Length)
For a single transfer if the FS field is set this field overrides the SL field in the SIC register
and specifies the Strobe Length for the transfer. A value of “0b” specifies a strobe only for
the first active cycle of the transfer. A value of “1b” specifies a strobe active for the whole
transfer.
MB86296S <Coral-PA>
183
Specification Manual Rev0.1