參數(shù)資料
型號： A42MX16-3PL100A
廠商： Electronic Theatre Controls, Inc.
英文描述： 40MX and 42MX FPGA Families
中文描述： 40MX和42MX FPGA系列
文件頁數(shù)： 39/120頁
文件大?。?/td> 854K
代理商： A42MX16-3PL100A
25
4958B–AUTO–11/10
Atmel ATA6285/ATA6286 [Preliminary]
Bit 1 - EEWE: EEPROM Write Enable
The EEPROM Write Enable Signal EEWE is the write strobe to the EEPROM. When address
and data are correctly set up, the EEWE bit must be written to one to write the value into the
EEPROM. The EEMWE bit must be written to one before a logical one is written to EEWE; oth-
erwise no EEPROM write takes place. The following procedure should be followed when writing
the EEPROM (the order of steps 3 and 4 is not essential):
Wait until EEWE becomes zero.
Wait until SELFPRGEN in SPMCSR register becomes zero.
Write new EEPROM address to EEAR register (optional).
Write new EEPROM data to EEDR register (optional).
Write a logical one to the EEMWE bit while writing a zero to EEWE bit in EECR register.
Within four clock cycles after setting EEMWE, write a logical one to EEWE.
The EEPROM cannot be programmed during a CPU write to the Flash memory. The software
must check that the Flash programming is completed before initiating a new EEPROM write.
Step 2 is only relevant if the software contains a Boot Loader allowing the CPU to program the
Flash. If the Flash is never being updated by the CPU, step 2 can be omitted. See Section 3.19
programming.
Caution: An interrupt between step 5 and step 6 will make the write cycle fail, since the
EEPROM Master Write Enable will time-out. If an interrupt routine accessing the EEPROM is
interrupting another EEPROM access, the EEAR or EEDR Register will be modified, causing the
interrupted EEPROM access to fail. It is recommended to have the Global Interrupt Flag cleared
during all the steps to avoid these problems.
When the write access time has elapsed, the EEWE bit is cleared by hardware. The user soft-
ware can poll this bit and wait for a zero before writing the next byte. When EEWE has been set,
the CPU is halted for two cycles before the next instruction is executed.
Bit 0 - EERE: EEPROM Read Enable
The EEPROM Read Enable Signal EERE is the read strobe to the EEPROM. When the correct
address is set up in the EEAR Register, the EERE bit must be written to a logic one to trigger the
EEPROM read. The EEPROM read access takes one instruction, and the requested data is
available immediately. When the EEPROM is read, the CPU is halted for four cycles before the
next instruction is executed. The user should poll the EEWE bit before starting the read opera-
tion. If a write operation is in progress, it is neither possible to read the EEPROM, nor to change
the EEAR Register.
相關(guān)PDF資料
PDF描述
A42MX16-3PQ100A 40MX and 42MX FPGA Families
A42MX16-3VQ100 40MX and 42MX FPGA Families
A42MX16-3VQ100A 40MX and 42MX FPGA Families
A42MX16-3VQ100B 40MX and 42MX FPGA Families
A42MX24-2PQ100B 40MX and 42MX FPGA Families
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
A42MX16-3PL100B 制造商:未知廠家 制造商全稱:未知廠家 功能描述:40MX and 42MX FPGA Families
A42MX16-3PL100ES 制造商:未知廠家 制造商全稱:未知廠家 功能描述:40MX and 42MX FPGA Families
A42MX16-3PL100I 制造商:未知廠家 制造商全稱:未知廠家 功能描述:40MX and 42MX FPGA Families
A42MX16-3PL100M 制造商:未知廠家 制造商全稱:未知廠家 功能描述:40MX and 42MX FPGA Families
A42MX16-3PL84 功能描述:IC FPGA MX SGL CHIP 24K 84-PLCC RoHS:否 類別:集成電路 (IC) >> 嵌入式 - FPGA（現(xiàn)場可編程門陣列） 系列:MX 標(biāo)準(zhǔn)包裝:40 系列:SX-A LAB/CLB數(shù):6036 邏輯元件/單元數(shù):- RAM 位總計:- 輸入/輸出數(shù):360 門數(shù):108000 電源電壓:2.25 V ~ 5.25 V 安裝類型:表面貼裝 工作溫度:0°C ~ 70°C 封裝/外殼:484-BGA 供應(yīng)商設(shè)備封裝:484-FPBGA（27X27）
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