參數(shù)資料
型號(hào)： OM13005,598
廠商： NXP Semiconductors
文件頁(yè)數(shù)： 6/51頁(yè)
文件大?。?/td> 0K
描述： BOARD EVAL EM773 METER US PLUG
其它有關(guān)文件： EM773 Energy Metering IC Training
設(shè)計(jì)資源： Plug Meter Schematics, Gerber Files
USB Dongle Schematics, Gerber Files
標(biāo)準(zhǔn)包裝： 1
主要目的： 電源管理，電度表/功率表
嵌入式： 是，MCU，32 位
已用 IC / 零件： EM773FHN33，551
已供物品： 板
相關(guān)產(chǎn)品： 568-5213-ND - IC ENERGY METER ARM 32VQFN
其它名稱(chēng)： 568-6680
EM773
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 2 — 3 January 2012
14 of 51
NXP Semiconductors
EM773
Energy metering IC
Counter or timer operation.
One capture channel per timer, that can take a snapshot of the timer value when an
input signal transitions. A capture event may also generate an interrupt.
Four match registers per timer that allow:
– Continuous operation with optional interrupt generation on match.
– Stop timer on match with optional interrupt generation.
– Reset timer on match with optional interrupt generation.
Up to four external outputs corresponding to match registers, with the following
capabilities:
– Set LOW on match.
– Set HIGH on match.
– Toggle on match.
– Do nothing on match.
7.13 System tick timer
The ARM Cortex-M0 includes a system tick timer (SYSTICK) that is intended to generate
a dedicated SYSTICK exception at a fixed time interval (typically 10 ms).
7.14 Windowed WatchDog Timer
The purpose of the watchdog is to reset the controller if software fails to periodically
service it within a programmable time window.
7.14.1 Features
Internally resets chip if not periodically reloaded during the programmable time-out
period.
Optional windowed operation requires reload to occur between a minimum and
maximum time period, both programmable.
Optional warning interrupt can be generated at a programmable time prior to
watchdog time-out.
Enabled by software but requires a hardware reset or a watchdog reset/interrupt to be
disabled.
Incorrect feed sequence causes reset or interrupt if enabled.
Flag to indicate watchdog reset.
Programmable 24-bit timer with internal prescaler.
Selectable time period from (Tcy(WDCLK) 256 4) to (Tcy(WDCLK) 224 4) in
multiples of Tcy(WDCLK) 4.
The Watchdog Clock (WDCLK) source can be selected from the IRC or the dedicated
watchdog oscillator (WDO). This gives a wide range of potential timing choices of
watchdog operation under different power conditions.
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