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M93C-46BN6 bảng dữ liệu(PDF) 4 Page - STMicroelectronics |
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4 / 31 page M93C86, M93C76, M93C66, M93C56, M93C46 4/31 SUMMARY DESCRIPTION These electrically erasable programmable memo- ry (EEPROM) devices are accessed through a Se- rial Data Input (D) and Serial Data Output (Q) using the MICROWIRE bus protocol. In order to meet environmental requirements, ST offers these devices in ECOPACK® packages. ECOPACK® packages are Lead-free and RoHS compliant. ECOPACK is an ST trademark. ECOPACK speci- fications are available at: www.st.com. Figure 2. Logic Diagram Table 2. Signal Names The memory array organization may be divided into either bytes (x8) or words (x16) which may be selected by a signal applied on Organization Se- lect (ORG). The bit, byte and word sizes of the memories are as shown in Table 3. Table 3. Memory Size versus Organization The M93Cx6 is accessed by a set of instructions, as summarized in Table 4., and in more detail in Table 5. to Table 7.). Table 4. Instruction Set for the M93Cx6 A Read Data from Memory (READ) instruction loads the address of the first byte or word to be read in an internal address register. The data at this address is then clocked out serially. The ad- dress register is automatically incremented after the data is output and, if Chip Select Input (S) is held High, the M93Cx6 can output a sequential stream of data bytes or words. In this way, the memory can be read as a data stream from eight to 16384 bits long (in the case of the M93C86), or continuously (the address counter automatically rolls over to 00h when the highest address is reached). Programming is internally self-timed (the external clock signal on Serial Clock (C) may be stopped or left running after the start of a Write cycle) and does not require an Erase cycle prior to the Write instruction. The Write instruction writes 8 or 16 bits at a time into one of the byte or word locations of the M93Cx6. After the start of the programming cy- cle, a Busy/Ready signal is available on Serial S Chip Select Input D Serial Data Input Q Serial Data Output C Serial Clock ORG Organisation Select VCC Supply Voltage VSS Ground AI01928 D VCC M93Cx6 VSS C Q S ORG Device Number of Bits Number of 8-bit Bytes Number of 16-bit Words M93C86 16384 2048 1024 M93C76 8192 1024 512 M93C66 4096 512 256 M93C56 2048 256 128 M93C46 1024 128 64 Instruction Description Data READ Read Data from Memory Byte or Word WRITE Write Data to Memory Byte or Word EWEN Erase/Write Enable EWDS Erase/Write Disable ERASE Erase Byte or Word Byte or Word ERAL Erase All Memory WRAL Write All Memory with same Data |
Số phần tương tự - M93C-46BN6 |
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Mô tả tương tự - M93C-46BN6 |
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