參數(shù)資料
型號： A42MX16-1PL100
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)： 40/120頁
文件大小： 854K
代理商： A42MX16-1PL100
26
4958B–AUTO–11/10
Atmel ATA6285/ATA6286 [Preliminary]
The calibrated Oscillator is used to time the EEPROM accesses. Table 3-2 lists the typical pro-
gramming time for EEPROM access from the CPU.
The following code examples show one assembly and one C function for writing to the
EEPROM. The examples assume that interrupts are controlled (e.g. by disabling interrupts glob-
ally) so that no interrupts will occur during execution of these functions. The examples also
assume that no Flash Boot Loader is present in the software. If such code is present, the
EEPROM write function must also wait for any ongoing SPM command to finish.
Table 3-2.
EEPROM Programming Time
Symbol
Number of Calibrated RC Oscillator Cycles Typ. Programming Time
EEPROM write (from CPU)
67 584
8.5ms
Assembly Code Example
EEPROM_write:
; Wait for completion of previous write
sbic EECR,EEWE
rjmp EEPROM_write
; Set up address (r18:r17) in address register
out EEARH, r18
out EEARL, r17
; Write data (r16) to Data Register
out EEDR,r16
; Write logical one to EEMWE
sbi EECR,EEMWE
; Start eeprom write by setting EEWE
sbi EECR,EEWE
ret
C Code Example
void EEPROM_write(unsigned int uiAddress, unsigned char ucData)
{
/* Wait for completion of previous write */
while(EECR & (1<<EEWE))
;
/* Set up address and Data Registers */
EEAR = uiAddress;
EEDR = ucData;
/* Write logical one to EEMWE */
EECR |= (1<<EEMWE);
/* Start eeprom write by setting EEWE */
EECR |= (1<<EEWE);
}
相關(guān)PDF資料
PDF描述
A42MX16-1PL100A IC TVS BI-DIR 5V 350W SOD-323
A42MX16-1PL100B 40MX and 42MX FPGA Families
A42MX16-1PL100ES 40MX and 42MX FPGA Families
A42MX16-1PL100I 40MX and 42MX FPGA Families
A42MX16-1PL100M IC TVS BI-DIR 24V 350W SOD-323
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
A42MX16-1PL100A 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
A42MX16-1PL100B 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
A42MX16-1PL100ES 制造商:ACTEL 制造商全稱:Actel Corporation 功能描述:40MX and 42MX FPGA Families
A42MX16-1PL100I 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
A42MX16-1PL100M 制造商:ACTEL 制造商全稱:Actel Corporation 功能描述:40MX and 42MX FPGA Families
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