CA91L8260B Datasheet, PDF (351/439 Pages) Integrated Device Technology – PowerSpan II™ User Manual

12. Register Descriptions
351
12.5.61
Semaphore 1 Register
If a SEMx is 0, this semaphore can be obtained by writing a 1 to the SEMx bit with a unique tag TAGx.
If on a subsequent read, the SEMx bit is set and the TAGx field contains the same unique tag, then the
semaphore has been obtained successfully.
To release a semaphore, write a 0 to the SEMx bit and the same tag that was used to obtain the
semaphore. If the tag is different from the tag that is in the register, then the write will have no effect.
Access to a single semaphore in this register requires a byte-wide transaction.
Register Name: SEMA1
Register Offset: 0x474
PCI
Bits
31-24
23-16
15-08
07-00
SEM7
SEM6
SEM5
SEM4
Function
TAG7
TAG6
TAG5
TAG4
PB
Bits
0-7
8-15
16-23
24-31
Name
SEM7
TAG7[6:0]
SEM6
TAG6[6:0]
SEM5
TAG5[6:0]
SEM4
TAG4[6:0]
Type
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Reset
By
G_RST
G_RST
G_RST
G_RST
G_RST
G_RST
G_RST
G_RST
Reset
State
0
0
0
0
0
0
0
0
Semaphore 7
Tag 7
Semaphore 6
Tag 6
Semaphore 5
Tag 5
Semaphore 4
Tag 4
Function
Integrated Device Technology
www.idt.com
PowerSpan II User Manual
80A1010_MA001_09