Datenblatt-Suchmaschine für elektronische Bauteile |
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STK17TA8-RF25I Datenblatt(PDF) 2 Page - Simtek Corporation |
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STK17TA8-RF25I Datenblatt(HTML) 2 Page - Simtek Corporation |
2 / 28 page 2 March 2007 Document Control #ML0025 Rev 1.5 STK17TA8 Packages 48- Pin SSOP 48 Pin SSOP VRTCbat VCAP VSS A16 A14 A12 A7 A6 A5 INT A4 VCC A15 A13 A8 DQ0 VSS VRTCcap DQ6 A9 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 W HSB DQ1 DQ2 X1 G A3 A2 A1 A0 X2 DQ5 A10 DQ7 DQ4 DQ3 VCC 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 E A11 For detailed package size specifications, see page 25. PIN DESCRIPTIONS Pin Name I/O Description A16-A0 Input Address: The 17 address inputs select one of 131,072 bytes in the nvSRAM array or one of 16 bytes in the clock register map DQ7-DQ0 I/O Data: Bi-directional 8-bit data bus for accessing the nvSRAM and RTC E Input Chip Enable: The active low E input selects the device W Input Write Enable: The active low W enables data on the DQ pins to be written to the address location selected on the falling edge of E G Input Output Enable: The active low G input enables the data output buffers during read cycles. De-asserting G high caused the DQ pins to tri-state. X1 Output Crystal Connection, drives crystal on startup X2 Input Crystal Connection for 32.768 kHz crystal VRTCcap Power Supply Capacitor supplied backup RTC supply voltage (Left unconnected if VRTCbat is used) VRTCbat Power Supply Battery supplied backup RTC supply voltage (Left unconnected if VRTCcap is used) VCC Power Supply Power: 3.0V, +20%, -10% HSB I/O Hardware Store Busy: When low this output indicates a Store is in progress. When pulled low external to the chip, it will initiate a nonvolatile STORE operation. A weak pull up resistor keeps this pin high if not connected. (Connection Optional). INT Output Interrupt Control: Can be programmed to respond to the clock alarm, the watchdog timer and the power monitor. Programmable to either active high (push/pull) or active low (open-drain) VCAP Power Supply Autostore Capacitor: Supplies power to nvSRAM during power loss to store data from SRAM to nonvolatile stor- age elements. VSS Power Supply Ground (Blank) No Connect Unlabeled pins have no internal connections. |
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Ähnliche Beschreibung - STK17TA8-RF25I |
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