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参数资料
型号： ST72E331J4D0
厂商： STMICROELECTRONICS
元件分类： 微控制器/微处理器
英文描述： 8-BIT, UVPROM, 8 MHz, MICROCONTROLLER, CDIP42
封装： 0.600 INCH, WINDOWED, CERAMIC, SDIP-42
文件页数： 38/107页
文件大小： 691K
代理商： ST72E331J4D0
36/107
ST72E331 ST72T331
EEPROM (Cont’d)
5.2.4 Low Power Modes
5.2.5 Interrupts
Note: This event generates an interrupt if the corresponding Enable Control Bit is set and the I-bit in the
CC register is reset (RIM instruction).
5.2.6 Register Description
EEPROM CONTROL REGISTER (CR)
Read/Write
Reset Value: 0000 0000 (00h)
Bit 7:3 = Reserved, forced by hardware to 0.
Bit 2 = E2ITE:
Interrupt enable.
This bit is set and cleared by software. It enables the
Data EEPROM interrupt capability when the
E2PGM bit is cleared by hardware. The interrupt re-
quest is automatically cleared when the software
enters the interrupt routine.
0: Interrupt disabled
1: Interrupt enabled
Bit 1 = E2LAT:
Read/Write mode.
This bit is set by software. It is cleared by hard-
ware at the end of the programming cycle. It can
only be cleared by software if E2PGM=0.
0: Read mode
1: Write mode
Bit 0 = E2PGM:
Programming Control.
This bit is set by software to begin the program-
ming cycle. At the end of the programming cycle,
this bit is cleared by hardware and an interrupt is
generated if the E2ITE bit is set.
0: Programming finished or not started
1: Programming cycle is in progress
Note: if the E2PGM bit is cleared during the pro-
gramming cycle, the memory data is not guaran-
teed.
Mode
Description
WAIT
The EEPROM can enter WAIT mode on execution of the WFI instruction of the microcontroller.
The EEPROM will immediately enter this mode if there is no programming in progress, other-
wise the EEPROM will finish the cycle and then enter WAIT mode.
The EEPROM interrupt exits from Wait mode.
HALT
The EEPROM immediately enters HALT mode if the microcontroller executes the HALT in-
struction. Therefore the EEPROM will stop the function in progress, and data may be corrupt-
ed.
Interrupt Event
Event
Flag
Enable
Control
Bit
Exit
from
Wait
Exit
from
Halt
End of Programming Cycle
E2PGM
E2ITE
Yes
No
70
0
E2ITE
E2LAT
E2PGM
36
相关PDF资料
PDF描述
ST72T331N2T1S 8-BIT, OTPROM, 8 MHz, MICROCONTROLLER, PQFP64
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