EP4CE55F29C8LN Altera, EP4CE55F29C8LN Datasheet - Page 223

• Manufacturer Part Number: EP4CE55F29C8LN
• Description: IC CYCLONE IV FPGA 55K 780FBGA
• Manufacturer: Altera
• Series: CYCLONE® IV Er

Specifications of EP4CE55F29C8LN

• Number Of Logic Elements/cells: 55856
• Number Of Labs/clbs: 3491
• Total Ram Bits: 2340000
• Number Of I /o: 374
• Voltage - Supply: 0.97 V ~ 1.03 V
• Mounting Type: Surface Mount
• Operating Temperature: 0°C ~ 85°C
• Package / Case: 780-FBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Number Of Gates: -

Chapter 8: Configuration and Remote System Upgrades in Cyclone IV Devices
Configuration
Table 8–14. JTAG CONFIG_IO (without JTAG_PROGRAM) Instruction Flows
© December 2010 Altera Corporation
ACTIVE_DISENGAGE
CONFIG_IO
JTAG Boundary Scan
Instructions (no
JTAG_PROGRAM)
ACTIVE_ENGAGE
PULSE_NCONFIG
Pulse nCONFIG pin
JTAG TAP Reset
Notes to
(1) You must execute “R” indicates that the instruction before the next instruction, “O” indicates the optional instruction, “A” indicates
(2) Required if you use ACTIVE_DISENGAGE.
(3) Neither of the instruction is required if you use ACTIVE_ENGAGE.
JTAG Instruction
that the instruction must be executed, and “NA” indicates that the instruction is not allowed in this mode.
Table
8–14:
1
The CONFIG_IO instruction does not hold nSTATUS low until reconfiguration. You
must disengage the AS or AP configuration controller by issuing the
ACTIVE_DISENGAGE and ACTIVE_ENGAGE instructions when active configuration is
interrupted. You must issue the ACTIVE_DISENGAGE instruction alone or prior to the
CONFIG_IO instruction if the JTAG_PROGRAM instruction is to be issued later
(Table
active configuration controller is re-engaged after user mode is reached through JTAG
programming
While executing the CONFIG_IO instruction, all user I/Os are tri-stated.
If reconfiguration after interruption is performed using configuration modes (rather
than using JTAG_PROGRAM), it is not necessary to issue the ACTIVE_DISENGAGE
instruction prior to CONFIG_IO. You can start reconfiguration by either pulling
nCONFIG low for at least 500 ns or issuing the PULSE_NCONFIG instruction. If the
ACTIVE_DISENGAGE instruction was issued and the JTAG_PROGRAM instruction fails
to enter user mode, you must issue the ACTIVE_ENGAGE instruction to reactivate the
active configuration controller. Issuing the ACTIVE_ENGAGE instruction also triggers
reconfiguration in configuration modes; therefore, it is not necessary to pull nCONFIG
low or issue the PULSE_NCONFIG instruction.
ACTIVE_DISENGAGE
The ACTIVE_DISENGAGE instruction places the active configuration controller (AS
and AP) into an idle state prior to JTAG programming. The two purposes of placing
the active controller in an idle state are:
■
To ensure that it is not trying to configure the device during JTAG programming
(Interrupting Configuration)
PS
O
R
O
R
A
8–15). This puts the active configuration controllers into the idle state. The
Prior to User Mode
FPP
O
R
O
R
A
(Table
Configuration Scheme and Current State of the Cyclone IV Device
R
A
A
AS
O
R
O
R
(3)
(3)
8–15).
(2)
R
A
A
AP
0
R
0
R
(2)
(3)
(3)
PS
O
R
O
A
R
FPP
User Mode
O
R
O
A
R
R
AS
(Note 1)
O
R
O
O
O
R
(2)
R
AP
R
R
0
0
0
0
(2)
Cyclone IV Device Handbook, Volume 1
NA
PS
—
—
—
—
—
—
FPP
NA
—
—
—
—
—
—
Power Up
NA
AS
—
—
—
—
—
—
AP
NA
—
—
—
—
—
—
8–57