Renesas SH7727 General Information Manual page 18

R0P7727TH003TRKE General Information Manual
Table 1.2 Power supply, Dimensions, and Environmental Specifications of the T-Engine Board
Environment
Operating voltage
Dissipation current
Dimensions
Table 1.3 Permissible Current Supplied Externally by T-Engine Supply Voltage
Supply voltage
5V
3.3V
Table 1.2 shows the maximum dissipation current of T-Engine (comprising only the CPU board,
LCD board, debug board, and I/O board) without external devices.
Table 1.3 shows the sum of permissible current in all the powered devices on T-Engine.
Accordingly, when a current of 100mA is used for the PCMCIA card supply voltage (5V), the
currents of the USB bus power or expansion slot is 150mA (250mA to 100mA). This is true for the
supply voltage 3.3V.
When the PCMCIA card, etc. is powered from the internal power supply of T-Engine, the current
must not exceed the permissible current of each power supply shown in Table 1.3. Otherwise,
there is a risk of electric shock, heat, or fire.
Item
Operating conditions
- Temperature: 10-35ºC
- Humidity: 30 to 85% RH
Ambient gas: no corrosive gas
DC 5.6VDC
500mA
CPU board: 120mm x 75mm
LCD board: 120mm x 75mm
Debug board: 101mm x 75mm
I/O board: 101mm x 75mm
Permissible current
250mA
250mA
Specifications
(no dew condensation occurs)
Locations subject to current supply
• PCMCIA card power supply
• USB bus power
• Expansion slot
• PCMCIA card power supply
• Expansion slot
CAUTION
9
Outline