Z87L01

The Z87001 /Z87L01 FHSS Cordless Telephone Transceiver/ Controller is expressly designed to implement a 900 MHz frequency hopping spread spectrum cordless telephone compliant with US FCC regulations for unlicensed operation. The Z87001 and Z87L01 are distinct 5V and 3.3V versions, respectively, of the core device. For the sake of brevity, all subsequent references to the Z87001 in this document also apply to the Z87L01 unless specifically noted.

The Z87001 is the ROMless version of the Z87000 Spread Spectrum Controller IC. Specifically intended to facilitate user specific software development, the Z87001 can access up to 64 kwords of external program ROM.

The Z87001 supports a specific cordless phone system design that uses frequency hopping and digital modulation to provide extended range, high voice quality, and low system costs.

The Z87001 uses a Zilog 16-bit fixed-point two's complement static CMOS Digital Signal Processor core as the phone and RF section controller. The Z87001's DSP core processor further supports control of the RF section's frequency synthesizer for frequency hopping and the generation of the control messages needed to coordinate incorporation of the phone's handset and base station. Additional on-chip transceiver circuitry supports Frequency Shift Keying modulation/demodulation and multiplexing/demulti- plexing of the 32 kbps voice data and 4 kbps command  data between handset and base station. The Z87001 provides thirty-two I/O pins, including four wake-up inputs and two CPU interrupt inputs. These programmable I/O pins allow a variety of user-determined phone features and board layout configurations. Additionally, the pins may be used so that phone features and interfaces are supported by an optional microcontroller rather than by the Z87001's DSP core.

In combination with an RF section designed according to the system specifications, Zilog's Z87010/Z87L10 ADPCM Processor, a standard 8-bit PCM telephone codec and minimal additional phone circuity, the Z87001 and its embedded software provide a total system solution.