參數(shù)資料
型號: EVAL-ADUC831QSZ
廠商: Analog Devices Inc
文件頁數(shù): 38/76頁
文件大小: 0K
描述: KIT DEV FOR ADUC831 QUICK START
產(chǎn)品培訓模塊: Process Control
標準包裝: 1
系列: QuickStart™ 套件
類型: MCU
適用于相關(guān)產(chǎn)品: ADuC831
所含物品: 評估板、電源、纜線、軟件和說明文檔
產(chǎn)品目錄頁面: 739 (CN2011-ZH PDF)
相關(guān)產(chǎn)品: ADUC831BCPZ-ND - IC MCU 62K FLASH ADC/DAC 56LFCSP
ADUC831BCPZ-REEL-ND - IC MCU 62K FLASH ADC/DAC 56LFCSP
ADUC831BSZ-REEL-ND - IC MCU 62K FLASH ADC/DAC 52MQFP
ADUC831BSZ-ND - IC ADC/DAC 12BIT W/MCU 52-MQFP
其它名稱: EVAL-ADUC831QS
EVAL-ADUC831QS-ND
REV. 0
ADuC831
–43–
PSMCON
Power Supply Monitor Control Register
SFR Address
DFH
Power-On Default Value
DEH
Bit Addressable
No
Table XIV. PSMCON SFR Bit Designations
Bit
Name
Description
7
----
Reserved.
6
CMPD
DVDD Comparator Bit.
This is a read-only bit and directly reflects the state of the DVDD comparator.
Read “1” indicates the DVDD supply is above its selected trip point.
Read “0” indicates the DVDD supply is below its selected trip point.
5
PSMI
Power Supply Monitor Interrupt Bit.
This bit will be set high by the MicroConverter if either CMPA or CMPD is low, indicating low analog
or digital supply. The PSMI bit can be used to interrupt the processor. Once CMPD and/or CMPA
return (and remain) high, a 250 ms counter is started. When this counter times out, the PSMI interrupt
is cleared. PSMI can also be written by the user. However, if either comparator output is low, it is
not possible for the user to clear PSMI.
4
TPD1
DVDD Trip Point Selection Bits.
3
TPD0
These bits select the DVDD trip point voltage as follows:
TPD1
TPD0
Selected DVDD Trip Point (V)
00
4.37
01
3.08
10
2.93
11
2.63
2
----
Reserved.
1
----
Reserved.
0
PSMEN
Power Supply Monitor Enable Bit.
Set to “1” by the user to enable the Power Supply Monitor Circuit.
Cleared to “0” by the user to disable the Power Supply Monitor Circuit.
POWER SUPPLY MONITOR
As its name suggests, the Power Supply Monitor, once enabled,
monitors the DVDD supply on the ADuC831. It will indicate
when any of the supply pins drops below one of four user-
selectable voltage trip points, from 4.63 V to 4.39 V. For
correct operation of the Power Supply Monitor function, AVDD
must be equal to or greater than 2.7 V. Monitor function is
controlled via the PSMCON SFR. If enabled via the IEIP2 SFR,
the monitor will interrupt the core using the PSMI bit in the
PSMCON SFR. This bit will not be cleared until the failing power
supply has returned above the trip point for at least 250 ms. This
monitor function allows the user to save working registers to
avoid possible data loss due to the low supply condition, and also
ensures that normal code execution will not resume until a safe
supply level has been well established. The supply monitor is also
protected against spurious glitches triggering the interrupt circuit.
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