WinSystems PPM-C407, Руководство по эксплуатации продукта

Страница: 20 / 69

PPM-C407/Configuration
v1.0 www.winsystems.com Page 16
7.6 Real-time Clock/Calendar
A real-time clock is used as the AT-compatible clock/calendar. It supports a number of
features including periodic and alarm interrupt capabilities. In addition to the time and
date keeping functions, the system configuration is kept in CMOS RAM contained within
the clock section. A battery must be enabled for the real-time clock to retain time and
date during a power down.
7.7 Power
The PPM-C407 draws power through the J1 connector (see “J1 Power Connector” on
page 16). The main supply to the board is 5 V DC. If supplied to the input connector, the
+12 V DC and -12 V DC supply only the PC/104 and PC/104-Plus connectors; 5 V DC
stand-by is only required to supply the power connector for ATX mode operation.
The PPM-C407 supports AT or ATX type power supplies. Jumper JP1 (see “JP1 AT/ATX
Power Mode” on page 33) specifies the type of supply connected to the single board
computer. AT Power is a simple on/off power supply with no interaction with the single
board computer. Most embedded systems use this type of power supply (default
setting).
7.8 Connectors
7.8.1 J1 Power Connector
Use this connection to supply power to the PPM-C407. Set Jumper JP1 (see “JP1 AT/
ATX Power Mode” on page 33) to select the type of power supply operation (AT or
ATX).
PRELIMINARY