User Guide

PAMS
System Module DB6
NHB–3
Technical Documentation
Original 26/97
Page 4–31
ASIC
Introduction
The ASIC takes care of the following functions:
– interface between MCU and UIF
– interface between MCU, DSP and RFI
– hardware accelerator functions to DSP
– clock generation and disable/enable
– RF controls
– UIF interface
– Timers
– M2BUS interface
– UIM interface
Technical Specification
External Signals and Connections, Inputs
Signal name Signal description From
VL1 Logic supply voltage. Max 150 mA. PWRU
VL2 Logic supply voltage. Max 150 mA. PWRU
VA1 Logic supply voltage. Max 40 mA. PWRU
IOX I/O enable. Indicates access to DSP DSPU
address space.
RWX Read/WriteX DSPU
WSTROBEX MCU’s write strobe CTRLU
RSTROBEX MCU’s read strobe CTRLU
RFC reference clock from VCTCXO RF
XRES Master reset PWRU
DSPAD(16:0) Address bus and control signals DSPU
MCUAD(19:0) MCU’s address bus, A(19:16) and A(4:0) CTRLU
connected
DAX Data acknowledge RFI
MBUSDET MBUS activity detection CTRLU
DBUSDET DBUS activity detection DSPU