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ZPSD302V-B-20U Datasheet(PDF) 7 Page - STMicroelectronics |
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ZPSD302V-B-20U Datasheet(HTML) 7 Page - STMicroelectronics |
7 / 85 page PSD3XX Family 4 3.0 Key Features t Single-chip programmable peripheral for microcontroller-based applications t 256K to 1 Mbit of UV EPROM with the following features: • Configurable as 32, 64, or 128 K x 8; or as 16, 32, or 64 K x 16 • Divided into eight equally-sized mappable blocks for optimized address mapping • As fast as 70 ns access time, which includes address decoding t Optional 16 Kbit SRAM is configurable as 2K x 8 or 1K x 16. The access time can be as quick as 70 ns, including address decoding. t 19 I/O pins that can be individually configured for : • Microcontroller I/O port expansion • Programmable Address decoder (PAD) I/O • Latched address output • Open-drain or CMOS output t Two Programmable Arrays (PAD A and PAD B) replace your PLD or decoder, and have the following features: • Up to 18 Inputs and 24 outputs • 40 Product terms (13 for PAD A and 27 for PAD B) • Ability to decode up to 1 MB of address without paging t Microcontroller logic that eliminates the need for external “glue logic” has the following features: • Ability to interface to multiplexed and non-multiplexed buses • Built-in address latches for multiplexed address/data bus • ALE and Reset polarity are programmable (Reset polarity not programmable on V-versions) • Multiple configurations are possible for interface to many different microcontrollers t Optional built-in page logic expands the MCU address space by up to 16 times t Programmable power management with standby current as low as 1µA for low-voltage version • CMiser bit —programmable option to reduce AC power consumption in memory • Turbo Bit (ZPSD only)—programmable bit to reduce AC and DC power consumption in the PADs. t Track Mode that allows other microcontrollers or host processors to share access to the local data bus t Built-in security locks the device and PAD decoding configuration t Wide Operating Voltage Range • V-versions: 2.7 to 5.5 volts • Others: 4.5 to 5.5 volts t Available in a variety of packaging (44-pin PLDCC, CLDCC, TQFP, and PQFP) t Simple, menu-driven software (PSDsoft) allows configuration and design entry on a PC. |
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