Revision 1.31 – February 16, 2012
440EPx – PPC440EPx Embedded Processor
Data Sheet
Table 8. Signal Functional Description (Sheet 7 of 9)
Notes:
1. Receiver input has hysteresis
2. Must pull up (recommended value is 3kΩ to OV
(EOV
for Ethernet)
DD
DD
3. Must pull down (recommended value is 1kΩ)
4. If not used, must pull up (recommended value is 3kΩ to OV
(EOV
for Ethernet)
DD
DD
5. If not used, must pull down (recommended value is 1kΩ)
6. Strapping input during reset; pull-up or pull-down required
Signal Name
Serial Peripheral Interface
SCPClkOut
Description
I/O
Type
Notes
Clock output.
Data input.
I/O
I/O
O
3.3V LVTTL
3.3V LVTTL
3.3V LVTTL
2
2
2
SCPDI
SCPDO
Data output.
Interrupts Interface
IRQ0:4
External interrupt requests 0 through 4.
External interrupt request 5.
I/O
I
3.3V LVTTL
1
1, 5
1
3.3V LVTTL
Rcvr
IRQ5
IRQ6:9
External interrupt requests 6 through 9.
I/O
3.3V LVTTL
JTAG Interface
3.3V LVTTL
w/pull-up
TCK
Test Clock.
I
1
3.3V LVTTL
w/pull-up
TDI
Test Data In.
I
O
I
1, 4
TDO
TMS
Test Data Out.
Test Mode Select.
Test Reset.
3.3V LVTTL
3.3V LVTTL
w/pull-up
1
Note: Must be asserted low during a power-on system reset in
order to reset the JTAG interface. If the JTAG interface is not
reset, the processor may not boot.
3.3V LVTTL
w/pull-up
TRST
I
1, 5
AppliedMicro Proprietary
63
AMCC [ APPLIED MICRO CIRCUITS CORPORATION ]
