User Manual

DSH, Datasheet 903501205 May 1, 2003
Zensys A/S ZM1220 Z-Wave Module Page 9 of 15
CONFIDENTIAL
4.2.4 Analog-to-Digital Converter
Either AD1 or AD2 on the Application Connector can be used as Analog-to-Digital Converter (ADC)
input. The ADC is a 10-bit ADC. An internal (ZW0102) voltage reference can be used. For detailed
description and electrical specifications see [1].
4.2.5 TRIAC & ZEROX
The Z-Wave Module has a triac control output signal (TRIAC). The control of the TRIAC signal depends
on the ZEROX signal generated on the Application Module (when “Dimmer” SW is downloaded to the
Z-Wave Module). The Z-Wave Module generates a fire pulse to an external triac, when “closing” the
triac. The fire pulse is generated in both the high and the low period of the mains’ voltage. For detailed
triac control description and electrical characteristics see [1].
4.2.6 Pulse Width Modulator Output
The Pulse Width Modulator Output (PWM2) is controlled by an internal 16-bit Timer/Counter. The
prescaling of the Timer/Counter is:
• CLK : 7.376974 MHz
• CLK/2 : 3.688487 MHz
• CLK/4 : 1.844244 MHz
• CLK/8 : 922.1218 kHz
• CLK/16 : 461.0609 kHz
• CLK/32 : 230.5304 kHz
• CLK/64 : 115.2652 kHz
• CLK/128 : 57.63261 kHz
• CLK/256 : 28.81630 kHz
Where CLK is the system frequency determined by the crystal frequency (7.376974 MHz). The PWM2
output can also be used as GPIO.
4.3 Real-Time-Clock
A RTC crystal can be mounted for real-time application like hour/minute/second indication in for example
remote controls or for battery operated slaves that powers down and wakes up at certain time intervals.
4.4 EEPROM
The ZM1220 Z-Wave Module has mounting option for an external onboard EEPROM used for misc. data
storage. When used as Z-Wave Controller Node the EPPROM is used for routing table storage. Up to
256kbit EEPROM can be mounted, see [3] or [4] for further details.
4.5 Reset
The Z-Wave Module can be reset either by the integrated reset circuitry (with Brown-out detection) in the
ZW0102 Single Chip or by the Application Module via the Application Connector signal RESET_n.