GP521

www.DataSheet4U.com General Purpose Controller / Memory Chip for Hearing Instruments GP521 - DATA SHEET FEATURES general purpose EEPROM non-volatile memory 8 programmable current sink (PCS) control outputs can be configured with 6 PCS outputs for hearing instruments (two switchable, four non-switchable) status register data transmission error detection synchronization of GP521 internal clocks with program unit clock STANDARD PACKAGING Chip (129 x 112 mils) Au Bump DESCRIPTION The GP521 is a general purpose controller/memory chip intended for use with audio signal path circuits in programmable hearing instruments. The GP521 uses a flexible communication standard which allows room for future growth in programmable functions for hearing instruments. The communication with the program unit is over a bi-directional serial data link. Error detection circuitry is used to avoid undesired changes in programmed settings. The GP521 controls the audio signal path circuit using eight Programmable Current Sinks (PCS). Each PCS has 16 programmable settings. The circuit can be configured for either 6 or 8 PCS outputs. When used with a single pole single throw switch (SPST) under the 6 PCS configuration , it is possible to design a hearing instrument with two programmed settings (i.e. adjusting a low cut filter for either noisy or quiet background environments). The 8 output configuration may be used for circuits that require more programmable but nonswitchable settings. An e...