- 您现在的位置：买卖IC网 > PDF目录299030 > EP20K100BC196-2 (ALTERA CORP) LOADABLE PLD, PBGA196 PDF资料下载
参数资料
| 型号： | EP20K100BC196-2 |
| 厂商： | ALTERA CORP |
| 元件分类： | PLD |
| 英文描述： | LOADABLE PLD, PBGA196 |
| 文件页数： | 62/68页 |
| 文件大小： | 975K |
| 代理商： | EP20K100BC196-2 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页当前第62页第63页第64页第65页第66页第67页第68页
65
4317K–AVR–03/2013
AT90PWM2/3/2B/3B
Figure 11-3. Synchronization when Reading an Externally Applied Pin value
Consider the clock period starting shortly after the first falling edge of the system clock. The latch
is closed when the clock is low, and goes transparent when the clock is high, as indicated by the
shaded region of the “SYNC LATCH” signal. The signal value is latched when the system clock
goes low. It is clocked into the PINxn Register at the succeeding positive clock edge. As indi-
cated by the two arrows t
pd,max and tpd,min, a single signal transition on the pin will be delayed
between and 1 system clock period depending upon the time of assertion.
When reading back a software assigned pin value, a nop instruction must be inserted as indi-
cated in Figure 11-4. The out instruction sets the “SYNC LATCH” signal at the positive edge of
the clock. In this case, the delay t
pd through the synchronizer is 1 system clock period.
Figure 11-4. Synchronization when Reading a Software Assigned Pin Value
The following code example shows how to set port B pins 0 and 1 high, 2 and 3 low, and define
the port pins from 4 to 7 as input with pull-ups assigned to port pins 6 and 7. The resulting pin
XXX
in r17, PINx
0x00
0xFF
INSTRUCTIONS
SYNC LATCH
PINxn
r17
XXX
SYSTEM CLK
t
pd, max
t pd, min
out PORTx, r16
nop
in r17, PINx
0xFF
0x00
0xFF
SYSTEM CLK
r16
INSTRUCTIONS
SYNC LATCH
PINxn
r17
t
pd
相关PDF资料 |
PDF描述 |
|---|---|
| EP20K100BC196-3 | LOADABLE PLD, PBGA196 |
| EP20K100BI196-1 | LOADABLE PLD, PBGA196 |
| EP20K100BI196-2 | LOADABLE PLD, PBGA196 |
| EP20K100BI196-3 | LOADABLE PLD, PBGA196 |
| EP20K100BC324-1 | LOADABLE PLD, PBGA324 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| EP20K100BC356-1 | 功能描述:FPGA - 现场可编程门阵列 CPLD - APEX 20K 416 Macro 252 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 |
| EP20K100BC356-1ES | 制造商:未知厂家 制造商全称:未知厂家 功能描述:FPGA |
| EP20K100BC356-1V | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| EP20K100BC356-2 | 功能描述:FPGA - 现场可编程门阵列 CPLD - APEX 20K 416 Macro 252 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 |
| EP20K100BC356-2ES | 制造商:未知厂家 制造商全称:未知厂家 功能描述:FPGA |
发布紧急采购，3分钟左右您将得到回复。