Atmel AT91SAM9263-EK, Руководство пользователя

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Warning
6-2 AT91SAM9263-EK Evaluation Board User Guide
6325D–ATARM–26-Aug-09
Figure 6-1. BMS Signal Sampling
Workaround :
A t th e fir s t V D D B U p o w e r up o r i f t h i s p o w e r s u p p l y h a s be e n s h u t d o w n ( J 4 - 1 op e n e d
(VDDBU/VDDBACKUP Jumper) or the CR1225 battery cell (J3) removed or changed), the following
power-up sequence has to be applied in order to boot out of the internal ROM:
1. Close J2 to force power on
2. Open J5 (Boot Mode Select Jumper)
3. Power on the board
4. Remove and replace J4-1 (VDDBU/VDDBACKUP Jumper)
SLCK
processor_nreset
Backup Supply
(VDDBU)
POR output
NRST
(nrst_out)
EXTERNAL RESET LENGTH
= 2 cycles
Startup Time
MCK
Processor Startup
= 3 cycles
backup_nreset
Any
Freq.
BMS_PB3/AC97RX
BMS signal sampling