Preliminary
PowerNP NPe405L Embedded Processor Data Sheet
Signal Functional Description (Part 6 of 6)
Notes:
1. Receiver input has hysteresis.
2. Must pull up. See “Pull-up and Pull-down Resistors” on page 30 for recommended termination values.
3. Must pull down. See “Pull-up and Pull-down Resistors” on page 30 for recommended termination values.
4. If not used, must pull up.
5. If not used, must pull down.
6. Strapping input during reset; pull up or pull down as required.
7. Pull-up may be required. See “External Peripheral Bus Control Signals” on page 31.
Signal Name
Description
I/O
Type
Notes
System Interface
3.3V Analog
Wire w/ESD
SysClk
SysReset
SysErr
Main System Clock input.
I
I/O
O
I
5V tolerant
3.3V LVTTL
Main System Reset.
1, 2
5V tolerant
3.3V LVTTL
Set to 1 when a Machine Check is generated.
Halt from external debugger.
5V tolerant
3.3V LVTTL
Halt
1
1
General Purpose I/O. To access this function, software
must toggle a DCR bit.
5V tolerant
3.3V LVTTL
GPIO00:31
TestEn
I/O
I
Test Enable. Used only for manufacturing tests. Pull down
for normal operation.
3.3V LVTTL
Rcvr w/PD
This input must toggle at a rate of less than one half the
CPU core frequency (less than 100MHz in most cases). In
most cases this input toggles much slower (in the 1MHz to
10MHz range).
5V tolerant
3.3V LVTTL
TmrClk
I
1
Trace Interface
[TS1E]
[TS2E]
Even Trace execution status.To access this function,
software must toggle a DCR bit.
5V tolerant
3.3V LVTTL
O
O
O
[TS1O]
[TS2O]
Odd Trace execution status. To access this function,
software must toggle a DCR bit.
5V tolerant
3.3V LVTTL
Trace Status. To access this function, software must toggle
a DCR bit.
5V tolerant
3.3V LVTTL
[TS3:6]
[TrcClk]
Trace interface clock. A toggling signal that is always half
of the CPU core frequency. To access this function,
software must toggle a DCR bit.
5V tolerant
3.3V LVTTL
O
1
Power Pins
Ground
GND
I
Hardwire
Note: J09-J14, K09-K14, L09-L14, M09-M14, N09-N14,
and P09-P14 are also thermal balls.
V
Logic voltage—2.5V
I
I
Hardwire
Hardwire
DD
OV
Output driver voltage—3.3V
DD
3.3V DC
AV
Filtered PLL voltage—2.5V
I
DD
Wire w/ESD
Other Pins
Reserved
Do not connect signals, voltage, or ground to these pins.
n/a
n/a
37
AMCC [ APPLIED MICRO CIRCUITS CORPORATION ]
