nanopower ring-oscillator cycles. I" />
參數(shù)資料
型號: MAXQ612J-0000+
廠商: Maxim Integrated Products
文件頁數(shù): 24/35頁
文件大?。?/td> 0K
描述: IC MCU 16BIT 128KB IR MOD 44WQFN
產(chǎn)品培訓模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標準包裝: 43
系列: MAXQ®
核心處理器: RISC
芯體尺寸: 16-位
速度: 12MHz
連通性: I²C,SPI,UART/USART
外圍設備: 欠壓檢測/復位,紅外線,電源故障,POR,WDT
輸入/輸出數(shù): 32
程序存儲器容量: 128KB(128K x 8)
程序存儲器類型: 閃存
RAM 容量: 6K x 8
電壓 - 電源 (Vcc/Vdd): 1.7 V ~ 3.6 V
振蕩器型: 內部
工作溫度: 0°C ~ 70°C
封裝/外殼: 44-WFQFN 裸露焊盤
包裝: 管件
30
Maxim Integrated
16-Bit Microcontrollers with
Infrared Module and Optional USB
MAXQ612/MAXQ622
nanopower ring-oscillator cycles. If VDD > VRST during
detection, VDD is monitored for an additional nanopower
ring-oscillator period. If VDD remains above VRST for
the third nanopower ring period, the CPU exits the reset
state and resumes normal operation from utility ROM at
8000h after satisfying the crystal warmup period.
If a reset is generated by any other event, such as the
RESET pin being driven low externally or the watchdog
timer, the power-fail, internal regulator, and crystal
remain on during the CPU reset. In these cases, the CPU
exits the reset state in less than 20 crystal cycles after
the reset source is removed.
Table 5. Power-Fail Detection States During Normal Operation
STATE
POWER-FAIL
INTERNAL
REGULATOR
CRYSTAL
OSCILLATOR
SRAM
RETENTION
COMMENTS
A
On
Off
VDD < VPOR.
B
On
VPOR < VDD < VRST.
Crystal warmup time, tXTAL_RDY.
CPU held in reset.
C
On
VDD > VRST.
CPU normal operation.
D
On
Power drop too short.
Power-fail not detected.
E
On
VRST < VDD < VPFW.
PFI is set when VRST < VDD < VPFW and
maintains this state for at least tPFW, at
which time a power-fail interrupt is gener-
ated (if enabled).
CPU continues normal operation.
F
On
(Periodically)
Off
Yes
VPOR < VDD < VRST.
Power-fail detected.
CPU goes into reset.
Power-fail monitor turns on periodically.
G
On
VDD > VRST.
Crystal warmup time, tXTAL_RDY.
CPU resumes normal operation from
8000h.
H
On
(Periodically)
Off
Yes
VPOR < VDD < VRST.
Power-fail detected.
CPU goes into reset.
Power-fail monitor turns on periodically.
I
Off
VDD < VPOR.
Device held in reset. No operation allowed.
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