Storage packaging chip and pin multiplexing method thereof

Abstract

The invention discloses a storage packaging chip and a pin multiplexing method thereof. The storage packaging chip comprises at least one storage chip and an expansion chip which can receive the sameexternal input signal; and by additionally arranging a state register with the state bits for setting multiplexing and function switching of the pin groups of the expansion chip in the expansion chip,the configuration of the corresponding state bits in the expansion chip can be realized, so that the expansion chip supports a QPI mode and can be synchronized with the storage chip.

Description

technical field [0001] The present application relates to the technical field of semiconductors, in particular to a storage package chip and a pin multiplexing method thereof. Background technique [0002] Memory (Memory) is a memory device in a computer system used to store programs and data. All information in the computer, including input raw data, computer programs, intermediate running results and final running results are stored in the memory. In recent years, during the rapid development of semiconductor memory, flash memory (Flash) has become a memory commonly used in computers and mobile communication terminals due to its advantages of high density, low power consumption and low price. [0003] An enhanced flash memory chip with a response protection monotonic counter (Replay Protection Monotonic Counter, RPMC for short), usually integrates the Flash chip and the RPMC chip on a bare chip. The Flash chip is used to store the code and data of the Basic Input-Output ...

AI Technical Summary

Problems solved by technology

This sharing of a large number of pins limits the data input / output rate and the diversification of chip functions

And the Flash chip supports the serial peripheral interface (Serial Peripheral Interface, referred to as SPI) mode of the unit and the multi-bit quad peripheral interface (Quad Peripheral Interface, referred to as QPI) mode, but the RPMC chip only supports the SPI mode

In the prior art, when the Flash chip and the RPMC chip are stacked and sealed together, because the Flash chip and the RPMC chip cannot maintain exactly the same state, that is, the two chips cannot be effectively synchronized; therefore, the packaged chip only supports the SPI mode, which limits The function of the Flash chip

If the QPI function of the Flash chip is forcibly enabled, the RPMC chip is still in the SPI mode at this time. Since the Flash chip and the RPMC chip share a large number of pins, the signals received by the two chips are consistent but the working modes are different, which may easily lead to control logic failure. confusion

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