FS6012-02 查看數據表（PDF） - AMI Semiconductor
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FS6012-02 Datasheet PDF : 20 Pages
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August 1998
Table 17: Hot Key Description
COMMAND KEY BITS ADDRESS RANGE DESCRIPTION
0-7
0
Read
R
8-15
1
-
Manual Read with
selectable address
0-7
0
Write
W
8-15
1
All 15
bits
Manual Write with
selectable address
and user-defined
data
ACLK
A 0-3
0
0000- Cycles through ACLK
1111 frequencies (Table 3)
UCLK
U 4-7
0
0000- Cycles through UCLK
1111 frequencies (Table 4)
PCLK
P 8-10
1
000-111
Cycles through PCLK
frequencies (Table 6)
VCXO
Course Set
V 11-14
1
0000- Digital coarse tune of
1111 the VCXO
VCXO
Enable
E 15
1
Enables fine tune of
0-1 the VCXO via the
XTUNE pin
Set PSEL
Strap
S
-
Cycles through PCLK
-
00-11
frequencies via
PSEL0 and PSEL1
pins (Table 5)
Address
Select Strap
L
-
-
0-1
Alters ADDR bit in
the I2C address
Exit
X-
-
-
Exits the demo
program
6. Observe the response to the hot key selection. Re-
peated pressing of the same key will scroll through
the entire range of settings for the selected com-
mand, returning to the initial setting.
7. The Read and Write commands permit the user to
read data from a desired register or to manually over-
write data into a desired register.
8. Pressing a hot key strobes a 15-bit message to the
demo board via the interface cable. An example of
the response to the key selection is shown below:
Reading...
READ of address 0 is 22(0x16)
Read DONE...
9. The Set PSEL Strap and ADDRsel Strap Set com-
mands drive pins 3, 4 and 5 (ADDR, PSEL0, and
PSEL1) directly. No read/write activity will be ob-
served on the screen.
10. The FS6012 uses I2C-bus communication. The in-
terface cable must be correctly attached to the demo
board prior to performing any functions or an error
message will be displayed.
Figure 12: Error Messages
***********************************************
*
*
* WARNING !! - I2C BYTE SEND ACK failed !!! *
*
*
*
(press any key to continue)
*
*
*
***********************************************
During a Write procedure (from the computer to the de-
vice), an Acknowledge bit should be returned by the de-
vice. The above error occurs if the computer fails to re-
ceive an Acknowledge from the device.
***********************************************
*
*
* WARNING !! - I2C CONTROL ACK failed !!!
*
*
*
*
(press any key to continue)
*
*
*
***********************************************
The state of the I2C-bus is checked by the software dur-
ing a Sequential Register Read to the device. The above
message is displayed if the I2C-bus has a one-conflict
when the Acknowledge was supposed to occur.
***********************************************
*
*
* WARNING !! - I2C write of 1 failed !!!
*
*
*
*
(press any key to continue)
*
*
*
***********************************************
The state of the I2C-bus is checked by the software dur-
ing the transfer of information to the device. The above
message is displayed if the I2C-bus has a data bit zero-
conflict when the bit was supposed to be a one.
Writing 17(0x11) to address 0
Write DONE...
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