Microprocessor resets and supervisor ICs

Size: px

Start display at page:

Download "Microprocessor resets and supervisor ICs"

Brett Bernard Hoover
6 years ago
Views:

1 Microprocessor resets and supervisor ICs Selection guide Microprocessor resets and supervisors Microprocessor supervisors with switchover December

2 Microprocessor reset ICs n Monitor voltage, generate reset on power-on or low-voltage detect (POR/LVD) n Optional manual reset input used for push-button reset n 140ms minimum reset pulse width (trec) n -40 to 85 C Part number Reset output Active-low, push-pull Active-low, open-drain Active-high, push-pull Manual reset input V RST Voltage letter STM809 SOT V STM8xxL xxxx STM810 SOT V STM8xxM xxxx STM811 SOT V STM8xxT xxxx STM812 SOT V STM8xxS xxxx STM1001 SOT V STM8xxR xxxx Part number Order suffix SOT23-3 SOT143-4 V RST MR PULSE TIMING t rec (active low) (active high) STM809, SMT810, STM1001 SOT23-3 WX6F STM811, SMT812 SOT143-4 W16F Part number example: n STM809 (SOT23-3), V RST = 3.08V (nom), Part number: STM809TWX6F are Lead-free

3 Reset+watchdog n POR/LVD, push-button reset and watchdog n SOT23-5 package n 140ms minimum reset pulse width (trec) n -40 to 85 C Part number Watchdog input Manual reset input Reset outputs Active-low, push-pull Active-low, open-drain Active-high, push-pull V RST Voltage letter STM V STM6xxxL WY6F STM V STM6xxxM WY6F STM V STM6xxxT WY6F STM V STM6xxxS WY6F STM V STM6xxxR WY6F STM V STM6xxxZ WY6F STM6825 SOT23-5 V RST PULSE TIMING t re c (active low) (active high) Part number example: n STM6322 (SOT23-5), V RST = 2.63V (nom), STM6322RWY6F WDI WATCH- DOG MR are Lead-free

4 Microprocessor supervisors with real-time clocks Part number RTC interface M41T94 SPI 2.7 to 5.5V M41ST84Y 400kHz 4.5 to 5.5V M41ST84W I 2 C 2.7 to 3.6V Alarm μp and system supervisory features Watchdog POR-LVD 1 PFI-PFO 2 /Reset inputs 1. POR-LVD: power-on reset/low-voltage detect reset output 2. PFI-PFO: early power-fail warning (power-fail in/power-fail out) 3. THS pin: selects power-fail deselect threshold (2.65V or 4.40V for 3V or 5V operation) n Feature rich serial RTCs with 44 bytes of NVRAM n Automatic battery switchover n SPI bus (M41T94) or I 2 C (M41ST84) n Programmable squarewave generator 1 to 32kHz Battery monitor 2 SO-16 SOH28 1 SO-16 Comments 400nA Ibat; THS Pin 3 400nA Ibat n Industrial temperature: -40 to 85 C n Early power-fail warning (PFI/PFO: power-fail in/power-fail out) n Push-button reset n s: SO-16, SOH28 V UNREG REGULATOR µp I/O I 2 C/SPI NMI IRQ R1 R2 2/4 V UNREG V PFI THS (Only on M41T94) XTAL V BAT V SS 400kHz I 2 C: M41ST84 SPI: M41T94 RST PFI PFO AUTOMATIC BATTERY SWITCHOVER POWER-FAIL POWER-FAIL DETECT AND THRESHOLD WRITE PROTECT 1: VPFD = 4.40v 0: VPFD = 2.65v WDI M41ST84/M41T94 32kHz OSCILLATOR BATTERY MONITOR POWER-ON / LOW-VOLTAGE DETECT PUSH-BUTTON WATCHDOG EARLY POWER-FAIL WARNING (Only on M41ST84) YEAR MONTH DAY DATE HOURS MINS SECS 0.1SECS 0.01SECS CENTURY BIT CALIBRATION WATCHDOG ALARM SQUAREWAVE 44 BYTES NVRAM WDF AF IRQ/FT/OUT SQW RSTIN1 RSTIN2 (Only on M41T94) SNAPHAT battery/crystal top SO-16 SOH28 SNAPHAT IC are lead-free

5 TIMEKEEPER supervisors Microprocessor supervisors with switchover and real-time clocks Part number NVRAM RTC interface SNAPHAT Other Alarm μp and system supervisory features Watchdog POR-LVD 1 PFI-PFO 2 /Reset inputs Battery monitor M41ST95W 44B SPI SOX to 3.6V 2 1 M41ST87Y 4.5 to 5.5V 400kHz 128B I 2 SOX28 C M41ST87W 2.7 to 3.6V M41ST85Y 400kHz 4.5 to 5.5V 44B I 2 SOH28 SOX28 M41ST85W C 2.7 to 3.6V Squarewave out 32 KHz out Chip enable outputs to 85 C Comments 400nA Ibat Tamper detect, RAM clear, unique 400nA Ibat / µp /IRQ, I/O A(MSB) M48T212V BATTERY SWITCHOVER POR/LVD. MAN. WRITE PROTECT 1:2 DECODER RTC ALARM WATCHDOG V OUT RSTIN1 RSTIN2 ADDRESS/DATA BUS LPSRAM n TIMEKEEPER supervisors turn low-power SRAMs into TIMEKEEPER NVRAMs M48T212V Parallel 8b SOH to 3.6V 2 2 M48T201V Parallel 3.0 to 3.6V SOH44 M48T201Y 8b 4.5 to 5.5V POR-LVD: power-on reset/low-voltage detect reset output 2. PFI-PFO: early power-fail warning (power-fail in/power-fail out) n SOX28 embedded crystal IC are lead-free

6 Security supervisors n Supervisors which detect intrusions protect sensitive data n All include POR/LVD 1 and battery monitor Part number NVRAM RTCinterface M41T256 32KB 400kHz I 2 C M41ST87Y M41ST87W STM B 400kHz I 2 C SO44 SOH44 SOX28 QFN to 5.5V 4.5 to 5.5V 2.7 to 3.6V 2.2 to 3.6V Tamper inputs 1 VOUT - battery Switchover output μp and system supervisory features Chip enable gate Battery on Alarm Watchdog Over/under voltage detect PFI-PFO 2 Precision 1.237V reference output /Reset inputs STM1404 QFN to 3.6V POR-LVD: power-on reset/low-voltage detect reset output 2. PFI-PFO: early power-fail warning (power-fail in/power-fail out) Tamper detect/ram clear functions Configurable to do any or all of the following: n Record time of tamper event n Clear internal RAM (128 bytes) n Clear external RAM n Interrupt Over/under temp. detect Squarewave out M41ST87 MICROPROCESSOR SUPERVISOR TAMPER DETECT AND RAM CLEAR 32 khz out Oscillator fail detect EMBEDDED CRYSTAL -40 to 85 C Comments RAM clear, unique serial no. FIPS 140 level 3 FIPS 140 level 4 NVRAM SUPERVISOR V BAT V OUT Battery Switchover SERIAL RTC POWER-ON / LOW-VOLTAGE DETECT Microprocessor EARLY POWER- FAIL WARNING Supervisor (PFI/PFO) Tamper Circuit TP1IN TP2IN M41ST87 WATCHDOG INTERRUPT EXT RAM CLR INT RAM CLR µp/µc n SOX28 embedded crystal IC I 2 C NVRAM Supervisor BATTERY SWITCHOVER WRITE PROTECT LPSRAM SECURITIZOR V BAT Serial RTC YEAR MONTH DAY DATE HOURS MINUTES SECONDS 0.1 SECS 0.01 SECS CENTURY BIT CALIBRATION ALARM WATCHDOG SQUAREWARE 64 BIT SER. NO. 128 BYTES NVRAM are lead-free

7 Microprocessor supervisors n POR/LVD, push-button reset and watchdog n Separate watchdog output n Early power-fail warning (PFI/PFO: power-fail in/power-fail out) n SO-8 and TSSOP8 packages n -40 to 85 C Part number V RST (nom) (V PFD ) Active-low, push-pull Reset outputs Active-high, push-pull Manual reset input PFI/PFO Input Watchdog Output WDI STM813L WATCHDOG WATCHDOG TIMER WDO STM V STM V STM706T, S, R 3.08V, 2.93V, 2.63V STM V STM V STM708T, S, R 3.08V, 2.93V, 2.63V SO-8, TSSOP8 SO-8, TSSOP8 MR PFI V RST = 4.65V PULSE TIMING t rec 1.25V PFO STM813L 4.65V SO-8, STM706P 2.93V TSSOP8 TSSOP8 SO-8 are Lead-free

8 Microprocessor supervisors with switchover (NVRAM supervisors) n Supervisors with automatic battery switchover are used to turn low-power SRAMs into NVRAMs n -40 to 85 C Part number V RST (nom) (V PFD ) Reset output(s) Manual reset input PFI/ PFO Watchdog Chip enable gate switch signal Battery freshness seal Battery monitor M40SZ100W 2.60V Active-low, open drain SO-16 M40Z V, 4.60V SOH28 M40Z300W 2.60V, 2.90V Active-low, open drain SO-16, SOH28 STM690A 4.65V STM692A 4.40V Active-low, push-pull SO-8, TSSOP8 STM690T, S, R 3.08V, 2.93V, 2.63V STM V STM V Active-low, push-pull SO-8, TSSOP8 STM704T, S, R 3.08V, 2.93V, 2.63V STM795T, S, R 3.08V, 2.93V, 2.63V Active low, opendrain SO-8, TSSOP8 STM802L, M 4.65V, 4.40V STM802T, S, R 3.08V, 2.93V, 2.63V Active low, push-pull SO-8, TSSOP8 STM804T, S, R 3.08V, 2.93V, 2.63V Active-high, open drain SO-8, TSSOP8 STM805L 4.65V Active-high, push-pull SO-8, TSSOP8 STM805T, S, R 3.08V, 2.93V, 2.63V Active-high, open drain SO-8, TSSOP8 STM806T, S, R 3.08V, 2.93V, 2.63V Active-low, push-pull SO-8, TSSOP8 STM817L, M 4.65V, 4.40V Active-low, push-pull SO-8, TSSOP8 STM818L, M 4.65V, 4.40V Active-low, push-pull SO-8, TSSOP8 STM819L, M 4.65V, 4.40V Active-low, push-pull SO-8, TSSOP8 µp I/O /RST STM795R/S/T VOUT VBATT BATT ON (SW ) LPSRAM CEOUT CEIN Address/Data Bus SO-8 SNAPHAT battery top with SOH28 IC TSSOP8 SO-16 SO-8 are lead-free

9 Future developments Voltage detectors n Guaranteed assertion down to V cc = 1.0V n Low supply current -0.9μA (typ) n -40 to 85 C n SOT23-3 package Part number Multiple voltage rail supervisors V RST Reset output Comment STM V, 3.1V, 2.9V, 2.8V, 2.7V, 2.6V, 2.3V, 2.2V, 1.7V, 1.6V (nominal) Active-low, open drain +/- 2% STM threshold steps from 1.6V to 5.0V, 100mV steps Active-low, open drain +/- 1.5% n -40 to 85 C Part number n SOT23-5 and SOT23-6 packages Monitored voltages Fixed- 1 Fixed- 2 Adjustable RSTIN 1 Manual Rreset input (/MR) /MR delay adjust pin (MRC) Reset output (/RST) STM6717 V RST1 V RST2 Active-low, open drain SOT23-5 STM6718 V RST1 V RST2 Active-low, push-pull SOT23-5 STM6719 V RST1 V RST2 Active-low, open drain SOT23-6 STM6720 V RST1 V RST2 Active-low, push-pull SOT23-6 STM6777 V RST1 V RST2 Active-low, open drain SOT23-6 STM6778 V RST1 V RST2 Active-low, push-pull SOT23-6 STM6779 V RST1 Active-low, open drain SOT23-6 STM6780 V RST1 Active-low, push-pull SOT RSTIN is compared to a 0.63V threshold Microprocessor reset ICs Part number V RST Reset output STM1810L,M STM1811L,M STM1812L,M STM1813L,M STM1815T,S,R STM1816T,S,R STM1817T,S,R STM1818T,S,R L=4.62V M=4.37V T=3.06V S=2.88V R=2.55V Active-low, push-pull Active-low, open drain with internal pull-up Active-high, push-pull Active-low, open drain, Bi-directional with /MR detect Active-low, push-pull Active-low, open drain with internal pull-up Active-high, push-pull Active-low, open drain, Bi-directional with /MR detect SOT23-3 SOT23-5 Available Reset threshold combinations SOT23-6 V RST1 (nom) V RST2 (nom) 4.625V 3.075V 4.375V 2.925V 3.075V 2.313V*, 1.665V*, 1.388V, 1.11V*, 0.925V, 0.833V 2.925V 2.188V*, 1.575V*, 1.313V, 1.05V*, 0.875V, 0.788V 2.188V 1.575V*, 1.313V, 1.05V, 0.875V, 0.788V 1.575V 1.313V, 1.05V, 0.875V, 0.788V * Standard stocking item n Low supply current -4μA (typ) n 100ms (min) reset pulse width n Guaranteed assertion down to V cc = 1.0V n Fully compatible with DS181x and MXD181x n -40 to 105 C n SOT23-3 package SOT23-3 are lead-free

10 STMicroelectronics - December Printed in Italy - All rights reserved The STMicroelectronics corporate logo is a registered trademark of the STMicroelectronics group of companies. All other names are the property of their respective owners. For selected STMicroelectronics sales offices fax: France ; Germany ; Italy ; Japan ; Singapore ; Sweden ; Switzerland ; United Kingdom and Eire ; USA Full product information at Order code:sgmicrosuper1105 Recycled and chlorine free paper

Non-volatile RAMs. Selection guide. September

Non-volatile RAMs. Selection guide. September Non-volatile RAMs Selection guide September 2007 www.st.com/nvram ZEROPOWER NVRAMs Battery backed SRAM 16 Mbit to 16 Kbit Density 16 Mb (2 Mx8) M48Z2M1Y 5.0 M48Z2M1V 3.3 4 Mb (512 Kx8) M48Z512AY 5.0 32