MAX1441GUP/V+ Maxim Integrated Products, MAX1441GUP/V+ Datasheet
MAX1441GUP/V+
Specifications of MAX1441GUP/V+
Related parts for MAX1441GUP/V+
MAX1441GUP/V+ Summary of contents
Page 1
... Supports Two Independent Grounded Capacitor S Sensor Inputs -12V Reverse Voltage Protection with External S Diode PRKE System Proximity Sensing ® microcontroller Object Detection Systems PART MAX1441GUP/V+ +Denotes a lead(Pb)-free/RoHS-compliant package. /V Denotes an automotive qualified part. Touch Sensor Features Applications Ordering Information TEMP RANGE PIN-PACKAGE 20 TSSOP -40NC to +105NC ...
Page 2
Automotive, Two-Channel Proximity and Touch Sensor ABSOLUTE MAXIMUM RATINGS ( AGND = DGND, unless otherwise noted AGND .....................................................-0.3V to +45V BATT AGND ..................................................-0. SINPUT1, SINPUT2, ...
Page 3
Automotive, Two-Channel Proximity and ELECTRICAL CHARACTERISTICS (continued 28V -40NC to +105NC. Typical values are at V BATT erwise noted.) (Note 2) Maximum Excitation Frequency f EXMAX PARAMETER ...
Page 4
Automotive, Two-Channel Proximity and Touch Sensor (V = 14V 3.4V +25NC, unless otherwise noted.) BATT CAPACITANCE ERROR vs. TEMPERATURE 1.0 CO_ = 0, 0.8 3.6pF INPUT CAPACITANCE 0.6 5pF RANGE 0.4 ...
Page 5
Automotive, Two-Channel Proximity and (V = 14V 3.4V +25NC, unless otherwise noted.) BATT CAPACITANCE ERROR vs. INTERFERENCE FREQUENCY OFFSET 60 10pF RANGE, 50 CO_ = 8, 300kHz 40 EXCITATION FREQUENCY, 500mV ...
Page 6
Automotive, Two-Channel Proximity and Touch Sensor TOP VIEW PIN NAME 1 P0.4 CPU Port 0 Bit 4. Digital input/output. 2 P0.3/TMS CPU Port 0 Bit 3/TMS. Digital input/output. 3 P0.2/INT2/TDI CPU Port 0 Bit 2/TDI. Digital input/output with configurable edge-triggered ...
Page 7
Automotive, Two-Channel Proximity and SINPUT1 C2D1 OFFSET COMP1 AGUD1 SINUSOIDAL DIGITAL EXCITATION CONTROL GENERATOR BLOCK AGUD2 OFFSET COMP2 SINPUT2 C2D2 CLOCK GENERATOR PROGRAMMING PADS P0.4 SINPUT1 AGUD1 TOUCH PADS MAX1441 AGUD2 SINPUT2 Touch Sensor Functional Diagram V BATT V 128 ...
Page 8
Automotive, Two-Channel Proximity and Touch Sensor TCK TDI, TMS TDO Figure 1. JTAG Timing Diagram Detailed Description The MAX1441 is a 2-channel proximity and touch sensor that contains all the functions necessary to implement a proximity/touch ...
Page 9
Automotive, Two-Channel Proximity and SENSED OBJECT GROUND Figure 2. Capacitive-Sensing Function the microcontroller can use the OUT1 or OUT2 pins to signal the event to external modules. The GPIOs can also provide system or configuration inputs to the micro- controller. ...
Page 10
Automotive, Two-Channel Proximity and Touch Sensor Table 1. Important AFE Function Registers REGISTER FUNCTION CRNG Adjust the capacitance range FEL Set the frequency of excitation Set the bandwidth of the spread- FEB spectrum modulation CO1, CO2 Set the capacitance offset ...
Page 11
Automotive, Two-Channel Proximity and Power-Down Control Each sensor channel independently powers down through the PD register. Bit value 1 powers down the channel and bit value 0 powers up the channel. The excitation source circuitry powers down if both chan- ...
Page 12
Automotive, Two-Channel Proximity and Touch Sensor Indexes not specified in this table are either reserved for hardware functional use or for future expansion; access to these locations has deterministic behavior that may not be the intention of the user. Register ...
Page 13
Automotive, Two-Channel Proximity and Table 4. Special-Purpose Registers’ Reset Values REGISTER MSB AP — — APC — — PSF — — IC — — IMR — — SC — — IIR — — CKCN — — WDCN — — A0 ...
Page 14
Automotive, Two-Channel Proximity and Touch Sensor Table 5. Special-Purpose Register Bit Description (continued) REGISTER PSF (04h, 08h) Processor Status Flags Register (8-Bit Register) Initialization This register is set to 80h on all forms of reset. Read/Write Access Unrestricted direct read. ...
Page 15
Automotive, Two-Channel Proximity and Table 5. Special-Purpose Register Bit Description (continued) REGISTER Interrupt Mask 1. This bit is the module level interrupt enable for register module 1. To activate the IMR.1–IM1 interrupt request from module 1, the IGE and IM1 ...
Page 16
Automotive, Two-Channel Proximity and Touch Sensor Table 5. Special-Purpose Register Bit Description (continued) REGISTER CKCN[3:0] Reserved. These bits are read only. Read returns 0. Stop Mode Select. Setting this bit to 1 stops program execution and commences low-power CPU CKCN.4–STOP ...
Page 17
Automotive, Two-Channel Proximity and Table 5. Special-Purpose Register Bit Description (continued) REGISTER Watchdog Timer Mode Select Bits [1:0]. These bits are used to provide a user selection of watchdog timer interrupt periods, which determine the watchdog timer interrupt timeout when ...
Page 18
Automotive, Two-Channel Proximity and Touch Sensor Table 5. Special-Purpose Register Bit Description (continued) REGISTER PFX (00h–07h, 0Bh) Prefix Register (16-Bit Register) Initialization This register is cleared to 0000h on all forms of reset. Read/Write Access Unrestricted read/write. Prefix Register Bits ...
Page 19
Automotive, Two-Channel Proximity and Table 5. Special-Purpose Register Bit Description (continued) REGISTER DPC (04h, 0Eh) Data Pointer Control Register (16-Bit Register) Initialization This register is set to 0004h on all forms of reset. Read/Write Access Unrestricted read/write. DPC[1:0]–SDPS[1:0] Reserved. Read ...
Page 20
Automotive, Two-Channel Proximity and Touch Sensor Table 5. Special-Purpose Register Bit Description (continued) REGISTER DP0 (03h, 0Fh) Data Pointer 0 (16-Bit Register) Initialization This register is cleared to 0000h on all forms of reset. Read/Write Access Unrestricted read/write. Data Pointer ...
Page 21
Automotive, Two-Channel Proximity and Table 9 lists the SFR register’s functional bits and their bit positions. Table 10 specifies the default reset condition for all SFR bits. Special default values are labeled as “s” in the table. The default value ...
Page 22
Automotive, Two-Channel Proximity and Touch Sensor Table 10. Special-Function Register Reset Values MODULE 0 REGISTER MSB — PO0 — — — EIF0 — — EIE0 — — EIES0 — — TCON — — TFRQ — — TCNT — — PI0 ...
Page 23
Automotive, Two-Channel Proximity and Table 11. Special-Function Register Bit Description (continued) REGISTER EIE0 (02h, 00h) External Interrupt Enable 0 Register (8-Bit Register) Initialization This register is cleared to 00h on all forms of reset. Read/Write Access Unrestricted read/write. Enable External ...
Page 24
Automotive, Two-Channel Proximity and Touch Sensor Table 11. Special-Function Register Bit Description (continued) REGISTER TFRQ (05h, 00h) Timer Frequency Register (8-Bit Register) Initialization This register is cleared to 00h on all forms of reset. Unrestricted read. This register can only ...
Page 25
Automotive, Two-Channel Proximity and Table 11. Special-Function Register Bit Description (continued) REGISTER ICDC (1Ah, 00h) In-Circuit Debug Control Register (8-Bit Register) Initialization This register is cleared to 00h after a power-on reset or a Test-Logic-Reset TAP state. Unrestricted read; all ...
Page 26
Automotive, Two-Channel Proximity and Touch Sensor Table 11. Special-Function Register Bit Description (continued) REGISTER ICDF[7:2] Reserved. Read returns 0. ICDB (1Ch, 00h) In-Circuit Debug Buffer Register (8-Bit Register) Initialization This register is cleared to 00h after a power-on reset or ...
Page 27
Automotive, Two-Channel Proximity and Table 11. Special-Function Register Bit Description (continued) REGISTER SCT (01h, 01h) Single Conversion Register (8-Bit Register) Initialization This register is cleared to 02h on all forms of reset. Read/Write Access Unrestricted read/write. See the following individual ...
Page 28
Automotive, Two-Channel Proximity and Touch Sensor Table 11. Special-Function Register Bit Description (continued) REGISTER CH1 Rate-of-Change Wake-Up Threshold Enable. Setting this bit to 1 enables the rate-of-change WU1.1–RE1 wake-up threshold detection. Clearing this bit to 0 disables the rate-of-change wake-up ...
Page 29
Automotive, Two-Channel Proximity and Table 11. Special-Function Register Bit Description (continued) REGISTER CRSLT1H (09h, 01h) Channel 1 Conversion Result Register (8-Bit Register) Initialization This register is cleared to 00h on all forms of reset. Read/Write Access This register is read-only. ...
Page 30
Automotive, Two-Channel Proximity and Touch Sensor Table 11. Special-Function Register Bit Description (continued) REGISTER CO1 (10h, 01h) Channel 1 Capacitance Offset Register (8-Bit Register) Initialization This register is cleared to 00h on all forms of reset. Read/Write Access Unrestricted read/write. ...
Page 31
Automotive, Two-Channel Proximity and Memory Organization There are three distinct memory areas in the IC's regis- ters, program memory, and data memory. All memories are located on-chip. Data memory is realized by SRAM memory, which allows both read and write ...
Page 32
Automotive, Two-Channel Proximity and Touch Sensor A program segment on top of the 32K program memory space is realized by ROM, which provides system utility functions: • Reset vector • Bootstrap function for system initialization • In-circuit debug Reset vector is located in the utility code, ...
Page 33
Automotive, Two-Channel Proximity and The device does not support individual word programming. A whole page must be programmed at the same time. In attempts to write to an individual word, the data intended for the individual word is copied to ...
Page 34
Automotive, Two-Channel Proximity and Touch Sensor Table 12. MAXQ Family Instruction Set Summary (continued) MNEMONIC {L/S}JUMP src IP § src or src {L/S}JUMP C, src If C=1, IP § (IP + src) or src {L/S}JUMP NC, src If ...
Page 35
Automotive, Two-Channel Proximity and Special System Functions The device supports interrupt through the Interrupt Vector (IV) register and the Interrupt Control (IC) register. The IV register allows the user program to set a preferred vector location to any program memory ...
Page 36
Automotive, Two-Channel Proximity and Touch Sensor Table 13. Watchdog Timer Timeout Interval WD[1:0] TIMEOUT COUNT 00 16384 01 32768 10 65536 11 131072 The watchdog timer is clocked by the internal 32kHz oscillator (Table 13). All timing reference for the ...
Page 37
Automotive, Two-Channel Proximity and If the reset is caused by watchdog or external sources, the clock source (5MHz oscillator) remains running, but no program execution is allowed. When the reset source is external, the user must remove the reset stimulus. ...
Page 38
Automotive, Two-Channel Proximity and Touch Sensor The device implements an I/O port that is slightly differ- ent from those found in other MAXQ products. The I/O port is still governed by the PI0, PO0, and PD0 registers. When a PD0 ...
Page 39
Automotive, Two-Channel Proximity and The device supports a TAP and TAP controller for communication with a bus master that can be either an automatic test equipment or a component that interfaces to a higher level test bus as part of ...
Page 40
Automotive, Two-Channel Proximity and Touch Sensor Applications Information Layout, Grounding, and Bypassing For best performance, use PCBs. Ensure to separate digital and analog signal lines from each other. Do not run analog and digital signals parallel to one another (especially ...
Page 41
... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. 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 2010 Maxim Integrated Products © ...