Altera ALTDLL Manual de usuario Pagina 70
- Pagina / 117
- Tabla de contenidos
- MARCADORES
Valorado. / 5. Basado en revisión del cliente
Chapter 4: Functional Description 4–34
ALTDQ_DQS Megafunction Ports
© February 2012 Altera Corporation ALTDLL and ALTDQ_DQS Megafunctions User Guide
dqs_enable_in Input Optional V
CC
This active-high port is connected to the
DQS_ENABLE:dqsenable that is used to enable or
disable the DQS_ENABLE:dqsbusout port. When
the dqs_enable_in port is connected to GND, the
DQS_ENABLE:dqsbusout signal is GND on the
next falling edge of the DQS_ENABLE:dqsin signal.
The DQS_ENABLE:dqsbusout is connected
directly to the dqs_bus_out port.
dqs_input_data_in Input Optional GND This port receives the incoming DQS signal for the DQS
input path
dqs_input_data_out Output Optional — This port receives the outgoing DQS signal from the
DQS_INPUT_DELAY_CHAIN:busout port, or
directly from the dqs_input_data_in port
dqsupdateen Input Optional GND This active-high port is connected to the
DQS_DELAY_CHAIN:dqsupdateen port that is
used to latch the
DQS_DELAY_CHAIN:delayctrlin[5..0] and
DQS_DELAY_CHAIN:offsetctrlin[5..0]
signals. The dqsupdateen port is fed by the
ALTDLL:dll_dqsupdate port, or the core.
Io_clock_divider_clk Input Optional GND This port is connected to the
IO_CLOCK_DIVIDER:clk port that is the clock
input port for that block.
Io_clock_divider_
clkout[n
c
-1..0]
Output Optional — This port is connected to the
IO_CLOCK_DIVIDER:clkout port that is used to
output clock signal that is half the frequency of the
IO_CLOCK_DIVIDER:clk signal.
Io_clock_divider_
masterin
Input Optional GND This port is connected to the
IO_CLOCK_DIVIDER:masterin port that is used
when you need to chain multiple clock dividers together
to feed wider DQS groups.
Io_clock_divider_
slaveout
Output Optional — This port is connected to the
IO_CLOCK_DIVIDER:slaveout port that is used
when you need to chain multiple clock dividers together
to feed wider DQS groups. This port must not have
more than one fan-out and must only be connected to
the io_clock_divider_masterin port of
another ALTDQ_DQS megafunction.
offsetctrlin[5..0] Input Optional GND This port receives the Gray-coded fine-tune delay chain
setting for the DQS output path from the
ALTDLL:dll_offset_ctrl_a_offsetctrlo
ut[5..0] port or
ALTDLL:dll_offset_ctrl_b_offsetctrlo
ut[5..0]. This port must match the polarity of its
source and cannot be inverted.
Table 4–11. Megafunction Ports to Configure DQS Input Path (Part 2 of 2)
Port Name Type
Optional/
Required Default Description
- ALTDLL and ALTDQ_DQS 1
- Megafunctions User Guide 1
- UG-01032-5.0 2
- Contents 3
- 1. About these Megafunctions 5
- Features 6
- 2. Getting Started 7
- ALTOCT Megafunction 8
- Customized Controller Logic 8
- Simulate the Design 9
- Create Timing Constraints 9
- Adjust Constraints 10
- Generate the Megafunctions 11
- Settings Value 13
- Turned off 14
- Enable DQS delay chain 14
- 3. Parameter Settings 19
- [5..0] output port 20
- ALTDLL Parameter Editor 21
- ALTDQ_DQS Parameter Editor 23
- Reset/Config Ports 26
- ports on the megafunction 27
- — DQS_OFFSETCTRL_ 27
- inputs to be registered by 28
- signals of 28
- “DQ Input Path” on page 4–8 29
- 4. Functional Description 37
- ■ DQS Input Path 38
- ■ DQ Input Path 38
- ■ DQ Output/OE Path 38
- ■ DQS Output/OE Path 38
- ■ DQ/DQS OCT Path 38
- ALTDLL Megafunction 39
- ALTDQ_DQS Megafunction 40
- DQS Input Path 42
- DQ Input Path 44
- DQ Output/OE Path 46
- DQS Output/OE Path 48
- DQ/DQS OCT Path 50
- Delay Chains 51
- Deskew Delay Chains 52
- Note to Figure 4–13: 55
- Note to Figure 4–14: 55
- Note to Figure 4–15: 56
- Note to Figure 4–16: 56
- Note to Figure 4–17: 57
- DQS_CONFIG / IO_CONFIG Block 58
- ALTDLL Megafunction Ports 67
- ALTDQ_DQS Megafunction Ports 69
- DQ OE Path Megafunction Ports 78
- DQSn I/O Path Ports 79
- DQS_CONFIG/IO_CONFIG path 81
- RLDRAM interfaces 84
- Procedure 85
- 00 FF 00 FF 99
- ■ bidir_dq_io[0] 100
- A. Clear Box Generator 102
- Clear Box Generator Options 103
- Clear Box Parameters 104
- inputs are 108
- OUTPUT_DQ 114
- Additional Information 116
- Typographic Conventions 117
Relacionado con productos y manuales para Instrumentos de medición Altera ALTDLL
(71 paginas)© 2020, manymanuals.es. Todos los derechos reservados | 0.035 s |
Manymanuals.com
Manymanuals.de
Manymanuals.fr
Manymanuals.it
Manymanuals.pl
Manymanuals.cz
Manymanuals.es
Manymanuals-pt.com
Comentarios a estos manuales