参数资料
型号: EP1C4T256I7ES
厂商: Altera Corporation
英文描述: Cyclone FPGA Family Data Sheet
中文描述: 气旋的FPGA系列数据手册
文件页数: 29/104页
文件大小: 763K
代理商: EP1C4T256I7ES
Altera Corporation
January 2007
2–23
Preliminary
Embedded Memory
Byte Enables
M4K blocks support byte writes when the write port has a data width of
16, 18, 32, or 36 bits. The byte enables allow the input data to be masked
so the device can write to specific bytes. The unwritten bytes retain the
previous written value.
Table 2–5
summarizes the byte selection.
Control Signals & M4K Interface
The M4K blocks allow for different clocks on their inputs and outputs.
Either of the two clocks feeding the block can clock M4K block registers
(
renwe
, address, byte enable,
datain
, and output registers). Only the
output register can be bypassed. The six
labclk
signals or local
interconnects can drive the control signals for the A and B ports of the
M4K block. LEs can also control the
clock_a
,
clock_b
,
renwe_a
,
renwe_b
,
clr_a
,
clr_b
,
clocken_a
, and
clocken_b
signals, as
shown in
Figure 2–15
.
The R4, C4, and direct link interconnects from adjacent LABs drive the
M4K block local interconnect. The M4K blocks can communicate with
LABs on either the left or right side through these row resources or with
LAB columns on either the right or left with the column resources. Up to
10 direct link input connections to the M4K block are possible from the
left adjacent LABs and another 10 possible from the right adjacent LAB.
M4K block outputs can also connect to left and right LABs through 10
direct link interconnects each.
Figure 2–16
shows the M4K block to logic
array interface.
Table 2–5. Byte Enable for M4K Blocks
Notes (1)
,
(2)
byteena[3..0]
datain
×
18
datain
×
36
[0] = 1
[8..0]
[8..0]
[1] = 1
[17..9]
[17..9]
[2] = 1
[26..18]
[3] = 1
[35..27]
Notes to
Table 2–5
:
(1)
Any combination of byte enables is possible.
(2)
Byte enables can be used in the same manner with 8-bit words, i.e., in
×
16 and
×
32 modes.
相关PDF资料
PDF描述
EP1C4T256I8ES Cyclone FPGA Family Data Sheet
EP1C4T324C6ES Cyclone FPGA Family Data Sheet
EP1C4T324C7ES Cyclone FPGA Family Data Sheet
EP1C4T324C8ES Cyclone FPGA Family Data Sheet
EP1C4T324I6ES Cyclone FPGA Family Data Sheet
相关代理商/技术参数
参数描述
EP1C6F256C6 功能描述:FPGA - 现场可编程门阵列 FPGA - Cyclone I 598 LABs 185 IOs RoHS:否 制造商:Altera Corporation 系列:Cyclone V E 栅极数量: 逻辑块数量:943 内嵌式块RAM - EBR:1956 kbit 输入/输出端数量:128 最大工作频率:800 MHz 工作电源电压:1.1 V 最大工作温度:+ 70 C 安装风格:SMD/SMT 封装 / 箱体:FBGA-256
EP1C6F256C6N 功能描述:FPGA - 现场可编程门阵列 FPGA - Cyclone I 598 LABs 185 IOs RoHS:否 制造商:Altera Corporation 系列:Cyclone V E 栅极数量: 逻辑块数量:943 内嵌式块RAM - EBR:1956 kbit 输入/输出端数量:128 最大工作频率:800 MHz 工作电源电压:1.1 V 最大工作温度:+ 70 C 安装风格:SMD/SMT 封装 / 箱体:FBGA-256
EP1C6F256C7 功能描述:FPGA - 现场可编程门阵列 FPGA - Cyclone I 598 LABs 185 IOs RoHS:否 制造商:Altera Corporation 系列:Cyclone V E 栅极数量: 逻辑块数量:943 内嵌式块RAM - EBR:1956 kbit 输入/输出端数量:128 最大工作频率:800 MHz 工作电源电压:1.1 V 最大工作温度:+ 70 C 安装风格:SMD/SMT 封装 / 箱体:FBGA-256
EP1C6F256C7N 功能描述:FPGA - 现场可编程门阵列 FPGA - Cyclone I 598 LABs 185 IOs RoHS:否 制造商:Altera Corporation 系列:Cyclone V E 栅极数量: 逻辑块数量:943 内嵌式块RAM - EBR:1956 kbit 输入/输出端数量:128 最大工作频率:800 MHz 工作电源电压:1.1 V 最大工作温度:+ 70 C 安装风格:SMD/SMT 封装 / 箱体:FBGA-256
EP1C6F256C8 功能描述:FPGA - 现场可编程门阵列 FPGA - Cyclone I 598 LABs 185 IOs RoHS:否 制造商:Altera Corporation 系列:Cyclone V E 栅极数量: 逻辑块数量:943 内嵌式块RAM - EBR:1956 kbit 输入/输出端数量:128 最大工作频率:800 MHz 工作电源电压:1.1 V 最大工作温度:+ 70 C 安装风格:SMD/SMT 封装 / 箱体:FBGA-256