Altera I/O Buffer (ALTIOBUF) IP Core Manuale Utente Scaricare il pdf (Pagina 12)

Figure 7: Internal Architecture of ALTIOBUF (Input Buffer Mode)

This figure shows the internal architecture of the input buffer in the ALTIOBUF IP core.

STRATIXIII_IO_IBUF

ibufa_0

I O

datain[0..0]

io_config_datain

io_config_clk

ioconfiga_0

STRATIXIII_IO_CONFIG

io_config_clkena[0..0]

io_config_update

DATAIN

CLK

ENA

PADTOINPUTREGISTERDELAYSETTING[3..0]

UPDATE

STRATIXIII_DELAY_CHAIN

input_dyn_delay_chaina_0

DATAIN

DELAYCTRLIN[3..0] DATAOUT

dataout[0..0]

Figure 8: ALTIOBUF (Input Buffer Mode) Connected to the External Flipflop

This figure shows how to connect the external register to the IP core.

io_config_datain

io_config_clk

inddc01_w1:altiobuf_in

datain

io_config_clkena

io_config_update

ffclk

dataout

io_config_clk

io_config_datain

io_config_update dataout[0..0]

datain[0..0]

io_config_clkena[0..0]

PRN

CLR

input_ff

ENA

Differential Mode Pin Naming Convention

Use the following pin naming convention for differential mode:

<pin_name>[1..0]

Where:

• <pin_name>[0] is connected to the datain port

• <pin_name>[1] is connected to the datain_b port.

Note:

You must apply a differential I/O standard to both pins.

ALTIOBUF Output Buffer

The ALTIOBUF IP core (output buffer mode) uses the output and oe path of the dynamic delay chain,

where both share the same IO_CONFIG settings.

Contrary to the input path in the output and oe paths, you can add two optional registers, which are

external to the IP core. One is for the output path and the other is for the oe path.

Instead of connecting the input data to the datain port of the ALTIOBUF IP core (output buffer mode),

it is connected to the input of the registers that are external to the IP core. The output of the register is

then driven to the datain port of the first output delay chain port. In a similar way, the inverted input oe

is connected to the oe register that is external to the IP core, which drives the datain port of the first oe

delay chain port.

Differential Mode Pin Naming Convention

UG-01024

2014.12.15

Altera Corporation

I/O Buffer (ALTIOBUF) IP Core User Guide

Send Feedback

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 29 30

Commenti su questo manuale

Nessun commento

Altera I/O Buffer (ALTIOBUF) IP Core Manuale Utente Pagina 12

Commenti su questo manuale

Prodotti e manuali riguardandi Strumenti di misura Altera I/O Buffer (ALTIOBUF) IP Core