Requirements
2-26
AT91CAP9-STK Starter Kit User Guide
6351B–CAP–27-Jun-08
2.4.1.13 F13: Reset Configuration
Reset of the board is assumed by the reset circuit as shown below.
Each AT73C224 PMC provides an active low reset signal when an error occurs on one of it's power sup-
ply outputs. These open-drain output signals, CAP9_POK and FPGA_POK, with 10k to 3.3V pull-up, are
connected to a push button for manual hardware reset and provide the POR signal.
Reset signals are:
POR: Power On Reset signal, managed by CAP9_POK, FPGA_POK or manual hardware reset push
button (active low)
NRST: ICE probe AT91CAP9 microcontroller reset signal (active low)
RESET_CAP9: AT91CAP9 microcontroller reset signal (active low)
NTRST: test reset (active low)
RESET_FPGA: FPGA reset signal, it drives the nCONFIG signal of the FPGA (active low)
RST_SOFT_FPGA: FPGA reset from AT91CAP9 microcontroller (active high)
DONE_FPGA_CAP9
J17
1X3PTS_MD_2MM54
1
2
3
D4
BAT54CWP bF
1
2
3
R19
10K
3V3
R143
0R
FPGA_POK
R17
100K
CAP9_POK
C57
10UF_1210
1
2
NTRST
R145
10K
3V3
D5
BAT54SLT1G
2
3
1
DONE_FPGA
R144
1K
NC
POR
3V3
J16
1X3PTS_MD_2MM54
1
2
3
RESET_FPGA#
R18
10K
3V3
Q9A
SI5515DC
2
7
1
8
RST_SOFT_FPGA
R20
0R
R21
0R
S5
BP
3
1
2
4
RESET_CAP9#
NRST