MAXQ618 Maxim, MAXQ618 Datasheet
MAXQ618
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MAXQ618 Summary of contents
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... Microcontroller with Infrared Module General Description The MAXQ618 is a low-power, 16-bit MAXQ troller designed for low-power applications including uni- versal remote controls, consumer electronics, and white goods. The device combines a powerful 16-bit RISC microcontroller and integrated peripherals including two universal synchronous/asynchronous receiver-transmit- ters (USARTs) and an SPI™ ...
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... Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Power-Fail Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Applications Information Grounds and Bypassing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Additional Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Deviations from the MAXQ610 User’s Guide for the MAXQ618 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Development and Technical Support Ordering Information/Selector Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Package Information Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 ����������������������������������������������������������������� Maxim Integrated Products 2 ...
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... Maxim Integrated Products 3 LIST OF FIGURES LIST OF TABLES MAXQ618 ...
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... A I Power-Fail Off 0°C +70NC +25NC A I Power-Fail 0°C to +70NC A (Note 6) PFR (Note 7) POR t ON (Note 4) (Notes 4, 8) PFW 3.3V +25NC IHYS DD A MAXQ618 MIN TYP MAX UNITS V 3.6 RST 1.62 1.8 1.98 1.75 1.8 1.85 1.64 1.67 1.70 1.0 1.42 1.0 2.5 3.75 0.15 2.0 0. 27 ((PCI - ...
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... From initial oscillation (Note 4) OSCF (Note HFXOUT = GND +25NC +25NC POR voltage A DD (Note 4) (Note 4) Typical 1.64V +25°C (Note Mass erase ME Page erase MAXQ618 MIN TYP MAX UNITS 1.0 1.0 1.0 0.4 0.5 0.4 0.5 0 -100 +100 ...
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... SPI_RF MCH t MCL t MOH t MOV t MIS t MIH t MLH SCH SCL t SSE t SIS t SIH t SOV t SSH MAXQ618 MIN TYP MAX UNITS 20 100 20,000 Cycles 100 Years 65,535/ 1/f NANO f NANO MIN TYP MAX UNITS 8.3 23.6 t ...
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... RST is less than the POR release voltage. DD must be below V before a power-fail event is detected; refer to the MAXQ610 DD PFW and I , for all listed outputs combined should not exceed 32mA to satisfy the OH(MAX) OL(MAX) MAXQ618 MIN TYP MAX UNITS t SPI_RF SPI_RF = +3 ...
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... If used, they should be connected directly to the ground plane. 1.8V Regulator Output. This pin must be connected to ground through a 1.0FF (ESR: 2–10W) external ceramic-chip capacitor. The capacitor must be placed as close to this pin as possible. No devices other than the capacitor should be connected to this pin. MAXQ618 Pin Configuration P3.4/INT12 ...
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... All special functions must be enabled from software before they can be used. GPIO PORT PIN P0.0 P0.1 P0.2 P0.3 P0.4 P0.5 P0.6 P0.7 MAXQ618 Pin Description (continued) FUNCTION SPECIAL FUNCTION IR Modulator Output USART 0 Receive USART 0 Transmit USART 1 Receive USART 1 Transmit Type B Timer 0 Pin A or Type B Timer 1 Pin A ...
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... Software must configure these pins after release from reset to remove the high- impedance condition. All external interrupts must be enabled from software before they can be used. GPIO PORT PIN P3.0 P3.1 P3.2 P3.3 P3.4 P3.5 P3.6 P3.7 MAXQ618 Pin Description (continued) FUNCTION EXTERNAL INTERRUPT INT0 INT1 INT2 INT3 INT4 INT5 INT6 INT7 ...
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... Lower active-mode current combined with the even lower MAXQ618 stop-mode current (0.2FA typ) results in increased battery life. Application-specific peripherals include flexible timers for generating IR car- rier frequencies and modulation. A high-current IR drive ...
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... If the watchdog timer is not restarted for another full interval in this time period, a system reset occurs when the reset timeout expires. See WATCHDOG INTERRUPT TIMEOUT 2.7ms 21.9ms 174.7ms 1.4s MAXQ618 Watchdog Timer system clock cycles. An interrupt is gener- Table 1. WATCHDOG RESET AFTER WATCHDOG INTERRUPT (µs) 42.7 42 ...
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... Sets IRIF Generates an interrupt to the CPU if enabled (IRIE = 1). To terminate the current transmission, the user can switch to receive mode (IRMODE = 0) or clear IREN to 0. Carrier Modulation Time = IRMT + 1 carrier cycles MAXQ618 Figure 1. illustrates the basic carrier generation and its IR Transmission ...
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... Maxim Integrated Products 14 IRCA = 0002h IRMT = 5 IRCA, IRMT, IRDATA SAMPLED AT END OF IRV DOWN-COUNT INTERVAL CARRIER GENERATION CARRIER IRCAH + 1 IRCAL + 1 IRCFME 0 1 IRDATA IRMT MAXQ618 IRTXPOL 0 IRTX PIN 1 SAMPLE IRDATA ON IR INTERRUPT IRV = 0000h CARRIER MODULATION ...
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... IRTXM pin on the IRV interval down- count boundaries. See mode is enabled possible to output either the modu- lated (IRENV[1:0] = 01b) or unmodulated (IRENV[1:0] = 10b) carrier to the IRTX pin MAXQ618 Figure 4. When the envelope IRMT 0 IRMT ...
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... IRMT register is set to 0001h. The IRCFME bit is still used to define whether the IRV register is counting system IRCLK clocks or IRCA- defined carrier cycles. The IRXRL bit defines whether the IRV register is reloaded with 0000h on detection of MAXQ618 IR TIMER OVERFLOW INTERRUPT TO CPU IRV IR INTERRUPT ...
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... Maxim Integrated Products 17 IRMT = PULSE COUNTING IRV = CARRIER CYCLE COUNTING 7 Figure 6 • 16-bit up/down autoreload • Counter function of external pulse • 16-bit timer with capture • 16-bit timer with compare • Input/output enhancements for pulse-width modulation • Set/reset/toggle output state on comparator match • Prescaler with 2 MAXQ618 IRMT = PULSE COUNTING divider (for 10) ...
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... SSEL state (active low or active high) through the slave active select. START BITS N SAMPLE SHIFT SAMPLE t MCK t t MCH MCL t MOH t MOV MSB MSB MIS MIH MSB MSB-1 MAXQ618 DATA BITS STOP BITS 8 N MLH LSB LSB ...
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... HFXIN and HFXOUT to ground with a direct short trace. The typical values of external capacitors vary with the type of crystal to be used and should be initially selected based on load capacitance as suggested by the manufacturer. MAXQ618 t SSH t SD LSB ...
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... V DD RST reset source is removed. t < t PFW t ≥ ≥ t PFW E D MAXQ618 Power-Fail Detection 10, 11, and 12 show the power-fail detection and DD is monitored for an additional nanopower DD remains above ≥ t PFW ...
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... CRYSTAL SRAM OSCILLATOR RETENTION Off Off Off Off Yes On On Off Off Yes Off Off MAXQ618 COMMENTS — V < POR V < V < POR DD RST — Crystal warmup time, t XTAL_RDY CPU held in reset. V > RST — ...
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... PFW B C CRYSTAL OSCILLATOR RETENTION Off Off Off Off On On Off Off Off Off Off Off MAXQ618 t ≥ t PFW D SRAM COMMENTS Application enters stop mode. Yes V > RST CPU in stop mode. Power drop too short. Yes Power-fail not detected. V < V < ...
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... Maxim Integrated Products CRYSTAL OSCILLATOR RETENTION Off Off Off Off On On MAXQ618 D SRAM COMMENTS Application enters stop mode. Yes V > RST CPU in stop mode. ...
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... The user’s guides offer detailed information about device features and opera- tion. The following documents can be downloaded from www.maxim-ic.com/microcontrollers. or below GND. Violation • This MAXQ618 data sheet, which contains electrical/ timing specifications, pin descriptions, and package information. • The (www.maxim-ic.com/errata). ...
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... MAXQ610 User’s Guide. The following registers on the MAXQ610 (which are described in the MAXQ610 User’s Guide) do not exist on the MAXQ618, and all references to them should be disregarded: • Port 4 Output Register (PO4) • Port 4 Direction Register (PD4) • ...
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... Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2011 Maxim Integrated Products DESCRIPTION Maxim is a registered trademark of Maxim Integrated Products, Inc. MAXQ618 Revision History PAGES CHANGED — 26 ...