Fusion Family of Mixed Signal FPGAs
Revision 4
2-37
Voltage Regulator and Power System Monitor (VRPSM)
The VRPSM macro controls the power-up state of the FPGA. The power-up bar (PUB) pin can turn on
the voltage regulator when set to 0. TRST can enable the voltage regulator when deasserted, allowing
the FPGA to power-up when user want access to JTAG ports. The inputs VRINITSTATE and
RTCPSMMATCH come from the flash bits and RTC, and can also power up the FPGA.
Table 2-15 Memory Map for RTC in ACM Register and Description
ACMADDR
Register Name
Description
Use
Default
Value
0x40
COUNTER0
Counter bits 7:0
Used to preload the counter to
a specified start point.
0x00
0x41
COUNTER1
Counter bits 15:8
0x00
0x42
COUNTER2
Counter bits 23:16
0x00
0x43
COUNTER3
Counter bits 31:24
0x00
0x44
COUNTER4
Counter bits 39:32
0x00
0x48
MATCHREG0
Match register bits 7:0
The RTC comparison bits
0x00
0x49
MATCHREG1
Match register bits 15:8
0x00
0x4A
MATCHREG2
Match register bits 23:16
0x00
0x4B
MATCHREG3
Match register bits 31:24
0x00
0x4C
MATCHREG4
Match register bits 39:32
0x00
0x50
MATCHBIT0
Individual match bits 7:0
The output of the XNOR gates
0 – Not matched
1 – Matched
0x00
0x51
MATCHBIT1
Individual match bits 15:8
0x00
0x52
MATCHBIT2
Individual match bits 23:16
0x00
0x53
MATCHBIT3
Individual match bits 31:24
0x00
0x54
MATCHBIT4
Individual match bits 29:32
0x00
0x58
CTRL_STAT
Control (write/read) / Status
(read only) register bits
Refer
to
0x00
Note: *Signals are hardwired internally and do not exist in the macro core.
Figure 2-30 VRPSM Macro
VRPU
PUB
VRINITSTATE
RTCPSMMATCH
FPGAGOOD
PUCORE
VREN*
VRPSM
TRST*