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PSD4235F2-B-70JI Datasheet(PDF) 6 Page - STMicroelectronics |
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PSD4235F2-B-70JI Datasheet(HTML) 6 Page - STMicroelectronics |
6 / 93 page ![]() Preliminary Information PSD4000 Series t A simple interface to 16-bit microcontrollers that use either multiplexed or non-multiplexed busses. The bus interface logic uses the control signals generated by the microcontroller automatically when the address is decoded and a read or write is performed. A partial list of the MCU families supported include: • Intel 80196, 80296, 80186, and 80386EX • Motorola 68HC16, 68HC12, 683XX, and MC2001 • Philips 80C51XA • Infineon C16X devices • Hitachi H8 t 4 Mbit Flash memory. This is the main Flash memory. It is divided into eight equal-sized blocks that can be accessed with user-specified addresses. t Internal secondary 256 Kbit Flash boot memory. It is divided into four equal-sized blocks that can be accessed with user-specified addresses. This secondary memory brings the ability to execute code and update the main Flash concurrently. t 64 Kbit SRAM. The SRAM’s contents can be protected from a power failure by connecting an external battery. t General Purpose PLD (GPLD) with 24 outputs. The GPLD may be used to implement external chip selects or combinatorial logic function. t Decode PLD (DPLD) that decodes address for selection of internal memory blocks. t 52 individually configurable I/O port pins that can be used for the following functions: • MCU I/Os • PLD I/Os • Latched MCU address output • Special function I/Os. • I/O ports may be configured as open-drain outputs. t Standby current as low as 50 µA for 5 V devices. t Built-in JTAG compliant serial port allows full-chip In-System Programmability (ISP). With it, you can program a blank device or reprogram a device in the factory or the field. t Internal page register that can be used to expand the microcontroller address space by a factor of 256. t Internal programmable Power Management Unit (PMU) that supports a low power mode called Power Down Mode. The PMU can automatically detect a lack of microcontroller activity and put the PSD4000 into Power Down Mode. t Erase/Write cycles: • Flash memory – 100,000 minimum • PLD – 1,000 minimum • 15 year data retention 2.0 Key Features 3 3.0 PSD4000 Series Part # Flash Flash Main Boot Serial ISP Memory Memory PSD4000 I/O PLD Input Output PLD JTAG/ISP Kbit Kbit SRAM Supply Series Device Pins Inputs Macrocells Macrocells Outputs Port 8 Sectors (4 Sectors) Kbit Voltage PSD4000 PSD4135G2 52 66 24 Yes 4096 256 64 5V PSD4235G2* 52 82 24 16 24 Yes 4096 256 64 5V Table 1. PSD4000 Product Matrix *See PSD4235G2 Data Sheet. |
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