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CDP68HC68T1 Datasheet(PDF) 1 Page - Intersil Corporation |
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CDP68HC68T1 Datasheet(HTML) 1 Page - Intersil Corporation |
1 / 24 page 1 ® FN1547.7 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-352-6832 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright Harris Corporation 1997. Copyright Intersil Americas Inc. 2001, 2004-2006. All Rights Reserved All other trademarks mentioned are the property of their respective owners. CDP68HC68T1 CMOS Serial Real-Time Clock With RAM and Power Sense/Control The CDP68HC68T1 Real-Time Clock provides a time/calendar function, a 32 byte static RAM, and a 3 wire Serial Peripheral Interface (SPI Bus). The primary function of the clock is to divide down a frequency input that can be supplied by the on-board oscillator in conjunction with an external crystal or by an external clock source. The internal oscillator can operate with a 32kHz, 1MHz, 2MHz, or 4MHz crystal. An external clock source with a 32kHz, 1MHz, 2MHz, 4MHz, 50Hz or 60Hz frequency can be used to drive the CDP68HC68T1. The time registers hold seconds, minutes, and hours, while the calendar registers hold day-of-week, date, month, and year information. The data is stored in BCD format. In addition, 12 or 24 hour operation can be selected. In 12 hour mode, an AM/PM indicator is provided. The T1 has a programmable output which can provide one of seven outputs for use elsewhere in the system. Computer handshaking is controlled with a “wired-OR” interrupt output. The interrupt can be programmed to provide a signal as the result of: 1) an alarm programmed to occur at a predetermined combination of seconds, minutes, and hours; 2) one of 15 periodic interrupts ranging from sub-second to once per day frequency; 3) a power fail detect. The PSE output and the VSYS input are used for external power control. The CPUR output is available to reset the processor under power-down conditions. CPUR is enabled under software control and can also be activated via the CDP68HC68T1’s watchdog. If enabled, the watchdog requires a periodic toggle of the CE pin without a serial transfer. Features • SPI (Serial Peripheral Interface) • Full Clock Features - Seconds, Minutes, Hours (12/24, AM/PM), Day of Week, Date, Month, Year (0-99), Automatic Leap Year • 32 Word x 8-Bit RAM • Seconds, Minutes, Hours Alarm • Automatic Power Loss Detection • Low Minimum Standby (Timekeeping) Voltage . . . . . 2.2V • Selectable Crystal or 50/60Hz Line Input • Buffered Clock Output • Battery Input Pin that Powers Oscillator and also Connects to VDD Pin When Power Fails • Three Independent Interrupt Modes -Alarm - Periodic - Power-Down Sense • Pb-Free Plus Anneal Available (RoHS Compliant) Pinouts CDP68HC68T1 (PDIP, SOIC) TOP VIEW CDP68HC68T1 (SOIC) TOP VIEW 9 10 11 12 13 14 16 15 8 7 6 5 4 3 2 1 CLKOUT CPUR INT SCK MOSI MISO VSS CE VDD XTAL IN VBATT VSYS XTAL OUT LINE POR PSE 11 12 13 14 15 16 17 18 20 19 10 9 8 7 6 5 4 3 2 1 CLK OUT CPUR INT NC SCK MOSI CE MISO VSS PSE VDD XTAL IN NC VBATT XTAL OUT VSYS NC NC LINE POR Data Sheet March 17, 2006 |
Número de pieza similar - CDP68HC68T1_06 |
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Descripción similar - CDP68HC68T1_06 |
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