FM3808DK FM3808 FM1808 545-FRAM A0-A14 FM3808-S-70 P6952-ND

FM3808DK FM3808 Development Kit Features · · · · · · 32Kx8 FRAM with self-contained

Product Preview FM3808DK FM3808DK FM3808 FM3808 Development Kit Features · · · · · · 32Kx8 FRAM with self-contained on-board real-time clock Convenient 32-pin DIP platform for developing with FM3808 FM3808 Provides 28-pin "memory-only" footprint for easy software development Includes all necessary discretes Onboard super- (gold-) cap backs up clock functions in the absence of power Includes optional pins for INT output and an external backup battery Description The FM3808DK FM3808DK is a development kit for the FM3808 FM3808 32Kx8 FRAM plus real-time clock. It is designed to provide simple solutions for three issues during the system development phase. They are 1) elimination of fine pitch surface mount considerations, 2) elimination of issues surrounding selection and procurement of discrete components such as the timekeeping crystal, and 3) elimination of battery backup and handling concerns. None of these issues is difficult during the system-manufacturing phase, but they can be inconvenient during system development and prototyping. Pin Configuration 32-pin Footprint 28-pin Footprint Certain customers may decide that the FM3808DK FM3808DK meets their production needs better than the stand alone FM3808 FM3808. As the module is primarily intended as a development kit and since the module is not encapsulated, such users should contact Ramtron to discuss their environmental and quantity needs. The FM3808DK FM3808DK is guaranteed over an industrial temperature range of -40°C to +85°C. 1 28 32 VDD A12 2 27 31 WE A7 3 26 30 A13 A6 4 25 29 A8 A5 The FM3808DK FM3808DK provides a 600-mil 32-pin DIP footprint. Users have the option to treat it as a 28-pin DIP, which is essentially a 32Kx8 memory pin out. The 28-pin footprint matches the FM1808 FM1808 or a standard SRAM. This allows software to be developed and tested without supporting clock features until the system is ready for them. The internal clock registers, which are memory mapped, can be supported as the software becomes ready. A14 5 24 28 A9 A4 6 23 27 A11 A3 7 22 26 OE A2 8 21 25 A10 A1 9 20 24 CE A0 10 19 23 DQ7 DQ0 11 18 22 DQ6 DQ1 12 17 21 DQ5 DQ2 13 16 20 DQ4 VSS 14 15 19 DQ3 NC 15 18 NC INT 16 17 VBAK Optional RTC pins Ordering Information FM3808DK FM3808DK This data sheet contains design specifications for product development. This product is still under development, these specifications may change in any manner without notice. 32-pin DIP module Ramtron International Corporation 1850 Ramtron Drive, Colorado Springs, CO 80921 (800) 545-FRAM 545-FRAM, (719)-481-7000 www.ramtron.com Rev. 0.2 Apr. 2005 Page 1 of 3 FM3808DK FM3808DK FM3808 FM3808 VDD System Supervisor Low VDD monitor/ Watchdog timer 10K Switched power FRAM Array 32,752x8 VBAK 0.1 F Data INT Interrupt Control Logic Address Decoder/ Bus Interface Address CE OE WE 4.7M Clock/Calendar 32.768 kHz X1 16 Clock/Calendar Registers X2 Figure 1. Block Diagram Pin Description Pin Name A0-A14 A0-A14 DQ0-7 /CE I/O Input Input/ Output Input /WE Input /OE Input INT VDD VSS VBAK Output Supply Supply Supply NC - Pin Description Address inputs Data I/O. 8-bit bi-directional data bus. Chip Enable. /CE selects the device when low. The falling edge of /CE causes the address to be latched internally. Address changes that occur after /CE goes low will be ignored until the next falling edge occurs. Write Enable. Asserting /WE low causes the FM3808 FM3808 to write the contents of the data bus. Output Enable. When /OE is low the FM3808 FM3808 drives the data bus when valid data is available. Deasserting /OE high causes the DQ pins to be tri-stated. Interrupt output. Programmable to either active high or open-drain, active low. Supply Voltage (5V) Ground Backup supply voltage: It backs up the clock and must be between 2.5V and VDD0.3V. The FM3808DK FM3808DK contains a backup super-capacitor. The user may connect an additional backup source as needed. Care should be used if interfacing a battery, since the FM3808DK FM3808DK contains a charging circuit for the cap. Current is drawn from VBAK when VDD < VBAK. Not used, may be removed by the user. Rev. 0.2 Apr. 2005 Page 2 of 3 0.82 in. 20.9mm. 0.50 in 12.7 mm 0.60 in. 15.2mm 0.30 in 7.62 mm C2 C3 0.16 R1 C4 C5 U1 FM3808 FM3808 0.10 in 2.54 mm 2.12 in. 53.8 mm R3 J1 D1 + Super Cap C1 Figure 2. Mechanical Drawing Table 1. Bill of Materials Symbol Part # U1 FM3808-S-70 FM3808-S-70 C2 C3 GDX-1C/A R1 R3 J1 C1 P6952-ND P6952-ND C4 C5 D1 BAS 70 -04 Description 256Kb FRAM with RTC 1 µF capacitor 0.1 µF capacitor Crystal 32.768 KHz, ± 10ppm, 6pF 4.7 M Resistor (oscillator resistor) 10 K resistor (Super Cap current limiter) Jumper to select 1 or 2 clamp diode hookup 0.1F Super Cap (or equivalent) Crystal tuning capacitor (optional) Crystal tuning capacitor (optional) Schottky Diode Pair Manufacturer Ramtron Golledge Panasonic Diodes Inc. Rev. 0.2 Apr. 2005 Page 3 of 3