User Guide

PAMS
System Module DB6
NHB–3
Technical Documentation
Original 26/97
Page 4–26
Technical Description
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
DSP1RSTX Reset for the DSP ASIC
DSPCLKEN Clock enable for DSP clock oscillator ASIC
circuit
PCMDATRCLKX PCM data input clock. DBUS data input ASIC
clock
PCMCOSYCLKX PCM data bit sync clock ASIC
CODEC_CLK PCM data output clock ASIC
DBUSCLK DBUS data output clock ASIC
DBUSSYNC DBUS data bit sync clock ASIC
PCMOUT Received audio in PCM format AUDIO
RDA DBUS received data system conn
INT0, INT1 Interrupts for the DSP ASIC
External Signals and Connections, Outputs
Signal name Signal description To
PCMIN Transmitted audio in PCM format AUDIO
TDA DBUS transmitted data System conn
IOX I/O enable. Indicates access to DSP ASIC
address space.
RWX Read/WriteX ASIC
DSPAD(16:0) Address bus and control signals ASIC
DBUSDET DBUS activity detection ASIC
External Signals and Connections, Bidirectional
Signal name Signal description To/From
DSPDA(15:0) 16–bit data bus ASIC