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STK17TA8-RF45ITR Arkusz danych(PDF) 2 Page - Simtek Corporation |
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STK17TA8-RF45ITR Arkusz danych(HTML) 2 Page - Simtek Corporation |
2 / 29 page 2 Jan, 2008 Document Control #ML0025 Rev 2.0 STK17TA8 Packages For detailed package size specifications, see page 26. VSS A14 A12 A7 A6 DQ0 DQ1 VCC DQ2 A3 A2 A1 VCAP A13 A8 A9 A11 A10 DQ7 DQ6 VSS A0 NC 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 NC X1 X2 23 24 A5 INT NC NC NC NC A4 48 47 46 45 VCC HSB NC NC W NC DQ5 DQ3 DQ4 VRTCbat VRTCcap A16 A15 E G 48-Pin SSOP (TOP) 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. |
Podobny numer części - STK17TA8-RF45ITR |
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Podobny opis - STK17TA8-RF45ITR |
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