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M93S66-125 Datasheet(PDF) 5 Page - STMicroelectronics |
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M93S66-125 Datasheet(HTML) 5 Page - STMicroelectronics |
5 / 28 page M93S66-125 M93S56-125 M93S46-125 Description Doc ID 022567 Rev 1 5/28 1 Description The M93S66-125, M93S56-125 and M93S46-125 are a range of 4-Kbit, 2-Kbit, and 1-Kbit serial Electrically Erasable PROgrammable Memory (EEPROM) products. They are collectively referred to as M93Sx6-125. Figure 1. Logic diagram The M93Sx6-125 is accessed through a Serial Data Input (D) and Serial Data Output (Q) using the MICROWIRE bus protocol. The memory is divided into 256, 128 and 64 x16-bit words (respectively for M93S66-125, M93S56-125 and M93S46-125). The M93Sx6-125 is accessed by a set of instructions which includes Read, Write, Page Write, Write All and instructions used to set the memory protection. These are summarized in Table 2 and Table 3. A Read data from memory (READ) instruction loads the address of the first word to be read into an internal address pointer. The data contained at this address is then clocked out serially. The address pointer is automatically incremented after the data is output and, if the Table 1. Signal names Signal name Description S Chip Select Input D Serial Data Input Q Serial Data Output C Serial Clock PRE Protection Register Enable W Write Enable VCC Supply Voltage VSS Ground |
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