Page History
...
| Each pin of B2B connectors JM4 and JM5 is capable of a maximum current of 1.0 A. |
...
power-rail |
...
name | power-railname | nominalvoltage ||||||||||
nominal | |||||||||||
maximum | powersource | systemsupply | usersupply|||||||||
power | system | user | |||||||||
Vb2b | 4.0 to 7.0 | 4.0 (4 pin × 1.0 A/pin) | JM5 | module | - | ||||||
Vusb | 5.0 | 0.5 | J1 | module | - | ||||||
Vsup | 4.0 to 7.0 | < 0.5 | Vusb | 3 × DC/DC DC/DC sync power-fail | JM5 (≤1.0 A) |
|
| <4 | Vb2b |
| |
< 4 | Vb2b | ||||||||||
3.3V | 3.3 | 3.0 | Vsup â-º DC/DC | module | JM4 (≤1.0 A) JM5 (≤1.0 A) | ||||||
2.5V | 2.5 | 3.0 | Vsup â-º DC/DC | DDR SDRAM | JM5 (≤1.0 A) | ||||||
1.2V | 1.2 | 3.0 | Vsup â-º DC/DC | VCCINT | JM5 (≤1.0 A) | ||||||
VCCAUX | 2.5 | 0.3 | 3.3V â-º LDO | VCCAUX | JM4 (≤1.0 A) |
| |||||
3.3 | < 3.0 | 3.3V | |||||||||
|
| VCCCIO0 | 2.5 | < 3.0 | 2.5V | VCCO | JM4 (≤1.0 A) | ||||
3.3 | < 3.0 | 3.3V |
| JM4 (≤1.0 A) | |||||||
| 1.10 to 3.60 | 2.0 (2 pin × 1.0 A/pin) | JM4 (30 + 44) |
| JM4 (30 / 44) |
Table 1: On-board power rails summary.
Power Supervision
Power-on Reset
During power-on, the /RESET line is first asserted. Thereafter, the supply voltage supervisor monitors the power supply rail 3.3V and keeps the /RESET line active (low) as long as the rail remains below the threshold voltage (2.93 V). An internal timer delays the return of the /RESET line to the inactive state (high) to ensure proper system reset. The delay time of 200 ms starts after the rail has risen above the threshold voltage.
...
Overview
Content Tools