Rev. D
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Page 16 of 48
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May 2012
Table 10. Pin Definitions—Flags, Interrupts, and Timer
Signal
Type
Term
Description
FLAG3–0
I/O/A
(pu)
nc
FLAG pins. Bidirectional input/output pins can be used as program conditions. Each pin
can be configured individually for input or for output. FLAG3–0 are inputs after power-
up and reset.
IRQ3–0
I/A
(pu)
nc
Interrupt Request. When asserted, the processor generates an interrupt. Each of the
IRQ3–0 pins can be independently set for edge-triggered or level-sensitive operation.
After reset, these pins are disabled unless the IRQ3–0 strap option and interrupt vectors
are initialized for booting.
TMR0E
O
na
Timer 0 expires. This output pulses whenever timer 0 expires. At reset, this is a strap pin.
I = input; A = asynchronous; O = output; OD = open-drain output; T = three-state; P = power supply; G = ground; pd = internal pull-down
5kΩ; pu = internal pull-up 5 kΩ; pd_0 = internal pull-down 5 kΩ on processor ID = 0; pu_0 = internal pull-up 5 kΩ on processor ID = 0;
pu_od_0 = internal pull-up 500 Ω on processor ID = 0; pd_m = internal pull-down 5 kΩ on processor bus master; pu_m = internal pull-up
5 kΩ on processor bus master; pu_ad = internal pull-up 40 kΩ. For more pull-down and pull-up information, see
Electrical Characteristics Term (termination of unused pins) column symbols: epd = external pull-down approximately 5 kΩ to VSS; epu = external pull-up
approximately 5 kΩ to VDD_IO, nc = not connected; na = not applicable (always used); VDD_IO = connect directly to VDD_IO; VSS = connect
directly to VSS
Table 11. Pin Definitions—Link Ports
Signal
Type
Term
Description
LxDATO3–0P
O
nc
Link Ports 1–0 Data 1–0 Transmit LVDS P
LxDATO3–0N
O
nc
Link Ports 1–0 Data 1–0 Transmit LVDS N
LxCLKOUTP
O
nc
Link Ports 1–0 Transmit Clock LVDS P
LxCLKOUTN
O
nc
Link Ports 1–0 Transmit Clock LVDS N
LxACKI
I (pd)
nc
Link Ports 1–0 Receive Acknowledge. Using this signal, the receiver indicates to the
transmitter that it may continue the transmission.
LxBCMPO
O (pu)
nc
Link Ports 1–0 Block Completion. When the transmission is executed using DMA,
this signal indicates to the receiver that the transmitted block is completed. The
pull-up resistor is present on L0BCMPO only. At reset, the L1BCMPO pin is a strap
LxDATI3–0P
I
VDD_IO
Link Ports 1–0 Data 3–0 Receive LVDS P
LxDATI3–0N
I
VDD_IO
Link Ports 1–0 Data 3–0 Receive LVDS N
LxCLKINP
I/A
VDD_IO
Link Ports 1–0 Receive Clock LVDS P
LxCLKINN
I/A
VDD_IO
Link Ports 1–0 Receive Clock LVDS N
LxACKO
O
nc
Link Ports 1–0 Transmit Acknowledge. Using this signal, the receiver indicates to the
transmitter that it may continue the transmission.
LxBCMPI
I (pd_l)
VSS
Link Ports 1–0 Block Completion. When the reception is executed using DMA, this
signal indicates to the receiver that the transmitted block is completed.
I = input; A = asynchronous; O = output; OD = open-drain output; T = three-state; P = power supply; G = ground; pd = internal pull-down
5kΩ; pu = internal pull-up 5 kΩ; pd_0 = internal pull-down 5 kΩ on processor ID = 0; pu_0 = internal pull-up 5 kΩ on processor ID = 0;
pu_od_0 = internal pull-up 500 Ω on processor ID = 0; pd_m = internal pull-down 5 kΩ on processor bus master; pu_m = internal pull-up
5 kΩ on processor bus master; pu_ad = internal pull-up 40 kΩ. For more pull-down and pull-up information, see
Electrical Characteristics Term (termination of unused pins) column symbols: epd = external pull-down approximately 5 kΩ to VSS; epu = external pull-up
approximately 5 kΩ to VDD_IO, nc = not connected; na = not applicable (always used); VDD_IO = connect directly to VDD_IO; VSS = connect
directly to VSS