EP3C16F256I7 Altera, EP3C16F256I7 Datasheet - Page 320

• Manufacturer Part Number: EP3C16F256I7
• Description: Cyclone III
• Manufacturer: Altera

Configuring Cyclone III Devices
10–84
Cyclone III Device Handbook, Volume 1
Note to
(1)
ACTIVE_DISENGAGE
CONFIG_IO
Other JTAG instructions O
JTAG_PROGRAM
CHECK_STATUS
JTAG_STARTUP
JTAG TAP Reset/ other
instruction
Table 10–18. JTAG Programming Instruction Flows
JTAG Instruction
“R” indicates required, “O” indicates optional, “Rc” indicates recommended, and “NA” indicates not allowed.
Table
10–18:
O
Rc
R
Rc
R
R
PS
(interrupting native
Prior to user mode
the required, recommended and optional instructions for each native
configuration mode. The ordering of the required instructions is a hard
requirement and must be met to ensure functionality.
The effect of the ACTIVE_DISENGAGE instruction is similar but not the
same to the AS and AP controllers. In AS configuration scheme,
ACTIVE_DISENGAGE will hold the AS controller in the "idle" state. In AP
configuration scheme, ACTIVE_DISENGAGE will cause the AP controller
to enter the "chill-out" state. If a successful JTAG programming is
executed, the active controllers will automatically be "re-engaged" once
usermode is reached via JTAG programming. This causes the active
controllers to transition to their respective usermode states.
If JTAG programming is not successful in getting the Cyclone III device
to usermode, and the user wishes to "re-engage" the native active
programming, the methods available to achieve this are different for AS
and AP configuration schemes. When in AS configuration scheme, you
can re-engage the AS controller either by moving the JTAG TAP controller
to the RESET state, or by issuing the ACTIVE_ENGAGE instruction. When
in AP configuration scheme, the only way to re-engage the AP controller
is to issue the ACTIVE_ENGAGE instruction. In this case, asserting the
nCONFIG pin will not re-engage either active controller.
Native configuration scheme and current state of the Cyclone III device
configuration)
O
Rc
O
R
Rc
R
R
FPP
R
O
O
R
Rc
R
R
AS
R
O
O
R
Rc
R
R
AP
Note (1)
O
O
O
R
Rc
R
R
PS
O
O
O
R
Rc
R
R
User mode
FPP
O
O
O
R
Rc
R
R
AS
R
O
O
R
Rc
R
R
AP
Altera Corporation-Preliminary
O
NA
O
R
Rc
R
R
PS
O
NA
O
R
Rc
R
R
FPP
Power up
R
NA
O
R
Rc
R
R
March 2007
AS
R
NA
O
R
Rc
R
R
AP