ZPSD302V单片机解密特性及要求描述如下:
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FEATURES
· Single-chip programmable peripheral for microcontroller-based applications
· 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
· 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.
· 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
· 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
· 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-v