S1R72105 Technical Manual
Rev.1.0
EPSON
35
7.3.35 Synchronize Transfer Mode (SYNCMODE) R/W
Sets the transfer rate and offset for SCSI synchronous transfer.
Address
Register Name
Bit Symbol
Description
2Dh
SYNCMODE
7: RATE3
SYNCHRONOUS TRANSFER RATE[3]
6: RATE2
SYNCHRONOUS TRANSFER RATE[2]
5: RATE1
SYNCHRONOUS TRANSFER RATE[1]
4: RATE0
SYNCHRONOUS TRANSFER RATE[0]
3: OFF3
SYNCHRONOUS OFFSET[3]
2: OFF2
SYNCHRONOUS OFFSET[2]
1: OFF1
SYNCHRONOUS OFFSET[1]
0: OFF0
SYNCHRONOUS OFFSET[0]
RATE3-0 ASSERT NEGATE PERIOD
OFF3-0 OFFSET
0000 1T(1T) 1T(1T) 2T
0000
Asynchronous
0001 2T(1T) 1T(2T) 3T
Note 2
0001 1
0010 2T 2T 4T 0010 2
0011 3T 2T 5T 0011 3
0100 3T 3T 6T 0100 4
0101 4T 3T 7T 0101 5
0110 4T 4T 8T 0110 6
0111 5T 4T 9T 0111 7
1000 5T 5T 10T 1000 8
1001 6T 5T 11T 1001 9
1010 6T 6T 12T 1010 10
1011 7T 6T 13T 1011 11
1100 7T 7T 14T 1100 12
1101 8T 7T 15T 1101 13
1110 8T 8T 16T 1110 14
1111 9T 8T 17T 1111 15
Note 1) T is a cycle double the internal clock (40MHz).
Note 2) When the ULTRA bit of the SCSIMODE0 register is set, T has the same cycle as the enclosed value of the internal clock
(40MHz) only if the value set for the RATE3 to 0 bit is 1 or less.
7.3.36 SCSI Own ID (OWNID) R/W
Sets the SCSI-ID of this IC itself.
Address
Register Name
Bit Symbol
Description
2Eh OWNID
7:
-
6:
-
5:
-
4:
-
3:
-
2:
OID2
(MSB)
1: OID1
SCSI OWN ID
0:
OID0
(LSB)
