MAX7365 Maxim, MAX7365 Datasheet
MAX7365
Related parts for MAX7365
MAX7365 Summary of contents
Page 1
... Key-Switch Controller with GPIO Ports General Description The MAX7365 C-interfaced peripheral that pro- vides microprocessors with management key switches. Key codes generated for each keypress and release enable easier implementation of multiple key entries. Key inputs monitored statically, not dynamically, ensure low- EMI operation ...
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... KEY N keys pressed simultaneously (Note Input voltage = 6mA SINK V = 1.8V and I = 5mA DD SINK 1.8V and I = 10mA DD SINK MAX7365 2 C-Interfaced +70NC 3.3V +25NC.) (Notes MIN TYP 1. 0 GND 40 80 ...
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... F t (Notes (Notes (Notes TIMEOUT = +25NC. Specifications over temperature are guaranteed by design GND and t measured between 0.8V and 2.1V and t R MAX7365 2 C-Interfaced 3.3V +25NC.) (Notes MIN TYP 5mA 0.1 0. ...
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... Typical Operating Characteristics T = +25° -40° +25° -40° -40°C A 2.6 3.1 3.6 MAX7365 2 C-Interfaced GPO OUTPUT LOW VOLTAGE vs. SINK CURRENT (GPIO4–GPIO0 3. LOW-SIDE OPEN-DRAIN MODE +85° +25° -40° ...
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... Maxim Integrated Products 5 1MHz I TOP VIEW MAX7365 ROW7 COL2 COL3 A ROW6 B ROW4 ROW5 COL1 COL6 ROW3 COL0 GPIO0 C ROW2 V SDA GPIO4 D ROW1 DD INT SCL GPIO3 E ROW0 WLP FUNCTION MAX7365 2 C-Interfaced Pin Configuration 5 COL4 COL5 GND GPIO1 GPIO2 Pin Description ...
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... GPIO LOGIC COLUMN ENABLE CURRENT DETECT GPI ENABLE GPI INPUT KEY- SCAN CONTROL LOGIC ROW ENABLE ROW DETECT GPI ENABLE GPI INPUT POR MAX7365 2 C-Interfaced Pin Description (continued) Functional Diagram GPIO0 GPIO1 GPIO2 GPIO3 GPIO4 COL0 COL1 CURRENT COL2 SOURCE ...
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... Key-Switch Controller with GPIO Ports Detailed Description The MAX7365 is a microprocessor peripheral low-noise, key-switch controller that monitors key switches with optional autorepeat. Key events are presented in a 16-byte FIFO. Key-switch functionality can be traded to provide logic inputs. The device features an addi- tional five GPIOs ...
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... FIFO, except when a special key code occurs. D6 indicates if a keypress or release event has occurred. Reading the keyscan FIFO clears the interrupt (INT), depending on the setting of bit D5 in the configuration register (0x01). MAX7365 2 C-Interfaced DESCRIPTION 2 C timeout interrupt enable, operating ...
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... The FIFOs are only cleared when the device is changing state from shutdown to operating mode. In sleep mode, the internal oscillator is disabled and the timeout features are disabled. MAX7365 C-Interfaced 10). Bits D[6:4] specify the autorepeat rate Autosleep Register (0x06) Key-Switch Array Size Register (0x30) Key-Switch Autosleep Mode ...
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... MAX7365 2 C-Interfaced GPIO Direction Register (0x31) (Table 13). Set the corresponding bit to GPO Output Mode Register (0x32) (Table GPIs LSB, MSB Port Value Registers (0x33, 0x34) (Read Only) (Table 15 and ...
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... INT. If multiple sources generate (Table 21 for the interrupt, all the related status registers must be read Table 23 for to clear INT. MAX7365 2 C-Interfaced Table 24). Set the bit to logic 0 for GPO Pullup/Pulldown Resister Enable Register GPIO Global Configuration Register (0x40) (Table 26) ...
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... SDA from low to high while SCL is high. The bus is then free for another transmission. t SU, DAT t SU, STA t HD, DAT t HIGH t F REPEATED START CONDITION MAX7365 2 C-Interfaced sent by a master, followed by the device’s 7-bit START and STOP Condition BUF t ...
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... This feature can be enabled or dis- Slave Addresses abled under user control by writing to the Configuration register. In sleep mode, the internal oscillator is disabled, thus the bus timeout feature is not active. CHANGE OF DATA DATA VALID ALLOWED 1 2 MAX7365 2 C-Interfaced Bus Timeout CLOCK PULSE FOR ACKNOWLEDGE 8 9 ...
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... A COMMAND BYTE MAX7365 2 C-Interfaced Message Format for Reading the Keyscan Controller (Figure (Figure 7, Table 5 COMMAND BYTE A P ACKNOWLEDGE FROM MAX7365 ACKNOWLEDGE FROM MAX7365 DATA BYTE 1 BYTE ACKNOWLEDGE FROM MAX7365 DATA BYTE ...
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... Reset from Figure 8. Ghost-Key Phenomenon AUTOINCREMENT ADDRESS (hex) 0x00 0x00 Addr + 0x01 Addr + 0x01 Figure 9. Valid Three-Key Combinations MAX7365 2 C-Interfaced (Figure 8). Because the key 9). There is no limit on the number of keys REGULAR KEYPRESS EVENT GHOST-KEY EVENT KEY-SWITCH MATRIX EXAMPLES OF VALID THREE-KEY COMBINATIONS ...
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... KEYS FIFO REGISTER DATA D7 D6 FIFO not-empty Key-release flag flag MAX7365 2 C-Interfaced Hot Insertion Power-Supply Considerations ) to GND with a DD Register Tables Key number/Key event ...
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... Disable keypress wakeup. 1 Enable keypress wakeup timeout enabled timeout disabled. MAX7365 2 C-Interfaced FUNCTION 2 C write to this bit write, autosleep, and autowake can all change this bit. This bit can be read back any time for current status ...
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... MAX7365 2 C-Interfaced PRESS DEBOUNCE TIME ...
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... FIFO-BASED INT Not all zero MAX7365 TIME-BASED INT Not all zero ...
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... REGISTER DATA RESERVED MAX7365 AUTOREPEAT DELAY Autorepeat delay ...
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... Set as input pin 1 Set as output pin 0 Set as input pin 1 Set as output pin 0 Set as input pin 1 Set as output pin 0 Set as input pin 1 Set as output pin 0 Set as input pin 1 Set as output pin MAX7365 C-Interfaced REGISTER DATA COLUMNS ...
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... Input value is low 1 Input value is high 0 Input value is low 1 Input value is high 0 Input value is low 1 Input value is high 0 Input value is low 1 Input value is high 0 Input value is low 1 Input value is high MAX7365 C-Interfaced DEFAULT VALUE 000 DEFAULT VALUE ...
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... Set output logic-low W 1 Set output logic-high 0 Set output logic-low W 1 Set output logic-high 0 Set output logic-low W 1 Set output logic-high 0 Set output logic-low W 1 Set output logic-high MAX7365 2 C-Interfaced DEFAULT VALUE FUNCTION DEFAULT VALUE 000 — ...
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... Interrupt is unmasked 1 Interrupt is masked 0 Interrupt is unmasked 1 Interrupt is masked 0 Interrupt is unmasked 1 Interrupt is masked 0 Interrupt is unmasked 1 Interrupt is masked 0 Interrupt is unmasked 1 Interrupt is masked 0 Interrupt is unmasked 1 Interrupt is masked 0 Interrupt is unmasked 1 Interrupt is masked MAX7365 C-Interfaced DEFAULT VALUE 000 DEFAULT VALUE ...
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... Rising and falling edge-triggered interrupts 0 Rising edge-triggered interrupts 1 Rising and falling edge-triggered interrupts 0 Rising edge-triggered interrupts 1 Rising and falling edge-triggered interrupts 0 Rising edge-triggered interrupts 1 Rising and falling edge-triggered interrupts MAX7365 C-Interfaced DEFAULT VALUE DEFAULT VALUE 000 ...
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... Rising and falling edge-triggered interrupts 0 Rising edge-triggered interrupts 1 Rising and falling edge-triggered interrupts 0 Rising edge-triggered interrupts 1 Rising and falling edge-triggered interrupts 0 Rising edge-triggered interrupts 1 Rising and falling edge-triggered interrupts MAX7365 C-Interfaced DEFAULT VALUE DEFAULT VALUE ...
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... Disable internal pullup/pulldown Enable internal pullup/pulldown for open- 1 drain output 0 Disable internal pullup/pulldown Enable internal pullup/pulldown for open- 1 drain output 0 Disable internal pullup/pulldown Enable internal pullup/pulldown for open- 1 drain output MAX7365 C-Interfaced DEFAULT VALUE 000 DEFAULT VALUE 000 ...
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... C timeout has occurred since last read or POR timeout has occurred since last read or POR. This bit is reset to zero when a read is performed on this register timeouts must be enabled for this function to work (Table 26). MAX7365 2 C-Interfaced FUNCTION 2 C REGISTER DATA D4 D3 ...
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... COL0 ROW7 KEY 4 KEY 12 ROW6 KEY 3 KEY 11 ROW5 ROW4 KEY 2 KEY 10 ROW3 ROW2 KEY 1 KEY 9 ROW1 ROW0 KEY 0 KEY 8 MAX7365 2 C-Interfaced Typical Application Circuit KEY 23 KEY 31 KEY 39 KEY 47 KEY 22 KEY 30 KEY 38 KEY 46 KEY 21 KEY 29 KEY 37 KEY 45 KEY 20 KEY 28 KEY 36 KEY 44 ...
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... RoHS status only. 74 Package drawings may show a different suffix character, but 76 the drawing pertains to the package regardless of RoHS status. PACKAGE TYPE 25 WLP MAX7365 2 C-Interfaced Chip Information Package Information PACKAGE OUTLINE LAND PATTERN NO. ...
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... Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 2011 Maxim Integrated Products © 2 1MHz I C-Interfaced DESCRIPTION Maxim is a registered trademark of Maxim Integrated Products, Inc. MAX7365 Revision History PAGES CHANGED — 31 ...