S1R72104 Technical Manual
20
EPSON
Rev.1.1
7.3.23 Test (TEST) R(/W)
Used for testing a LSI. Basically, writing in this register is prohibited.
CKOUTbit is valid, however, even when no test is done. If this bit is used, be sure to set all the other bits to
“0”.
Be cautious not to set “1” to bits other than CKOUTbit, because it will put the IC into Test mode, affecting on
the IC’s basic operation.
7 6 5 4 3 2 1 0
TM2 TM1 TM0
CKOUT -
OFST SCBC DMBC
1Eh
CLK OUT
BIT4 CLK OUT
Setting HIGH to this bit causes the internal operation clock, 40MHz, output from TESTMON(Pin13) pin.
7.3.24 Revision Reg. (REVISION) R
Shows the revision No. of the IC.
7 6 5 4 3 2 1 0
REV7 REV6 REV5 REV4 REV3
REV2 REV1 REV0
1Fh
7.4 SCSI Control Commands
7.4.1 Control Commands and Command Codes
Code
Command names
Summary of commands
00h
Reserved
01h
Abort_SCSI
SCSI Abort command
02h
Reserved
03h
04h
Assert_RST
SCSI Bus Clear command
05h Busfree
06h
Reserved
07h Assert_ATN
08h
SEL_MSG_clear
SCAM control commands
09h Select_WithoutATN
0Ah Select_WithATN_Command
0Bh SelectWithoutATN_Command
0Ch
Wait_Selection_Command
Connection system commands
0Dh
Reselection
0Eh
Wait_Reselection
0Fh
Wait_SCAM_Selection_Command
10h
Reserved
11h Negate_ACK
12h Command_Out
13h DMA_Data_Out
14h Non-DMA_Data_Out
15h
DMA_Data_In
Transfer system commands
16h Non-DMA_Data_In
17h Status_In
18h Message_In
19h Message_Out
1Ah Status_Message