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PM39LV010-70VCE Datasheet(PDF) 5 Page - PMC-Sierra, Inc |
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PM39LV010-70VCE Datasheet(HTML) 5 Page - PMC-Sierra, Inc |
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5 / 20 page  Programmable Microelectronics Corp. Issue Date: December, 2003 Rev: 1.2 PMC Pm39LV512 / Pm39LV010 / Pm39LV020 / Pm39LV040 5 BLOCK DIAGRAM DEVICE OPERATION READ OPERATION The access of Pm39LV512/010/020/040 are similar to EPROM. To read data, three control functions must be satisfied: • CE# is the chip enable and should be pulled low ( VIL ). • OE# is the output enable and should be pulled low ( VIL). • WE# is the write enable and should remains high ( VIH ). PRODUCT IDENTIFICATION The product identification mode can be used to identify the manufacturer and the device through hardware or software read ID operation. See Table 1 for PMC Manu- facturer ID and Device ID. The hardware ID mode is acti- vated by applying a 12.0 Volt on A9 pin, typically used by an external programmer for selecting the right pro- gramming algorithm for the devices. Refer to Table 2 for Bus Operation Modes. The software ID mode is acti- vated by a three-bus-cycle command. See Table 3 for Software Command Definition. WE# CE# OE# COMMAND REGISTER CE,OE LOGIC A0-A MS ERASE/PROGRAM VOLTAGE GENERATOR HIGH VOLTAGE SWITCH I/O0-I/O7 I/O BUFFERS DATA LATCH SENSE AMP Y-GATING MEMORY ARRAY Y-DECODER X-DECODER BYTE PROGRAMMING The programming is a four-bus-cycle operation and the data is programmed into the devices (to a logical “0”) on a byte-by-byte basis. See Table 3 for Software Com- mand Definition. A program operation is activated by writ- ing the three-byte command sequence followed by pro- gram address and one byte of program data into the devices. The addresses are latched on the falling edge of WE# or CE# whichever occurs later, and the data are latched on the rising edge of WE# or CE# whichever occurs first. The internal control logic automatically handles the internal programming voltages and timing. A data “0” can not be programmed back to a “1”. Only erase operation can convert the “0”s to “1”s. The Data# Polling on I/O7 or Toggle Bit on I/O6 can be used to detect the progress or completion of a program cycle. |
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