Sigma Designs Inc ZM5304-U User Manual
Datasheet: ZM5304
DSH12461-3 | 7/2013
7
ZM5304
USB_DP
USB_DM
Host
Figure 2.4: USB interface
2.1.9 WATCHDOG
The watchdog helps prevents the CPU from entering a deadlock state. A timer that is enabled by default achieves this by
triggering a reset event in case it overflows. The timer overflows in 1 second, therefore it is essential that the software clear the
timer periodically. The watchdog is disabled when the chip is in power down mode, and automatically restarts with a cleared
timer when waking up to the active mode.
triggering a reset event in case it overflows. The timer overflows in 1 second, therefore it is essential that the software clear the
timer periodically. The watchdog is disabled when the chip is in power down mode, and automatically restarts with a cleared
timer when waking up to the active mode.
2.1.10 WIRELESS TRANSCEIVER
The wireless transceiver is a sub-1 GHz ISM narrowband FSK radio, a modem, and a baseband controller. This architecture
provides an all-digital direct synthesis transmitter and a low IF digital receiver. The Z-Wave protocol currently utilizes 2-key
FSK/GFSK modulation schemes at 9.6/40/100 kbps data rates throughout a span of carrier frequencies from 865.2 to 926.3MHz.
provides an all-digital direct synthesis transmitter and a low IF digital receiver. The Z-Wave protocol currently utilizes 2-key
FSK/GFSK modulation schemes at 9.6/40/100 kbps data rates throughout a span of carrier frequencies from 865.2 to 926.3MHz.
The output power of the transmitter is configurable in the range -26dBm to +2dBm (V
DD
= 2.3 to 3.6V, T
A
= -10 to +85°C).
2.2 MEMORY MAP
An application executing on an external host microcontroller can access a minimum of 16kB allocated on the higher address
space of the integrated EEPROM via the serial API. As shown in Figure 2.5, the protocol data is stored in the lower address space.
A serial API function returns the size of the application data space. [1][2]
space of the integrated EEPROM via the serial API. As shown in Figure 2.5, the protocol data is stored in the lower address space.
A serial API function returns the size of the application data space. [1][2]
EEPROM Memory
(Byte addressable)
Protocol Data
(Reserved for Modem)
Application Data
(Available to Host)
0
16kB (min)
Offset
0
Figure 2.5: EEPROM memory map