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ADSP-TS202S
Rev. C
|
Page 17 of 48
|
December 2006
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 DSP 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
5k
Ω; pu = internal pull-up 5 kΩ; pd_0 = internal pull-down 5 kΩ on DSP ID = 0; pu_0 = internal pull-up 5 kΩ on DSP ID = 0; pu_od_0 = internal
pull-up 500
Ω on DSP ID = 0; pd_m = internal pull-down 5 kΩ on DSP bus master; pu_m = internal pull-up 5 kΩ on DSP bus master; pu_ad
= internal pull-up 40 k
Term (termination of unused pins) column symbols: epd = external pull-down approximately 5 k
Ω to VSS; epu = external pull-up approx-
imately 5 k
Ω 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 3–0 Data 3–0 Transmit LVDS P
LxDATO3–0N
O
nc
Link Ports 3–0 Data 3–0 Transmit LVDS N
LxCLKOUTP
O
nc
Link Ports 3–0 Transmit Clock LVDS P
LxCLKOUTN
O
nc
Link Ports 3–0 Transmit Clock LVDS N
LxACKI
I (pd)
nc
Link Ports 3–0 Receive Acknowledge. Using this signal, the receiver indicates to the
transmitter that it may continue the transmission.
LxBCMPO
O (pu)
nc
Link Ports 3–0 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, L2BCMPO, and L3BCMPO
LxDATI3–0P
I
VDD_IO
Link Ports 3–0 Data 3–0 Receive LVDS P
LxDATI3–0N
I
VDD_IO
Link Ports 3–0 Data 3–0 Receive LVDS N
LxCLKINP
I/A
VDD_IO
Link Ports 3–0 Receive Clock LVDS P
LxCLKINN
I/A
VDD_IO
Link Ports 3–0 Receive Clock LVDS N
LxACKO
O
nc
Link Ports 3–0 Transmit Acknowledge. Using this signal, the receiver indicates to the
transmitter that it may continue the transmission.
LxBCMPI
I (pd_l)
VSS
Link Ports 3–0 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
5k
Ω; pu = internal pull-up 5 kΩ; pd_0 = internal pull-down 5 kΩ on DSP ID = 0; pu_0 = internal pull-up 5 kΩ on DSP ID = 0; pu_od_0 = internal
pull-up 500
Ω on DSP ID = 0; pd_m = internal pull-down 5 kΩ on DSP bus master; pu_m = internal pull-up 5 kΩ on DSP bus master; pu_ad
= internal pull-up 40 k
Term (termination of unused pins) column symbols: epd = external pull-down approximately 5 k
Ω to VSS; epu = external pull-up approx-
imately 5 k
Ω to VDD_IO, nc = not connected; na = not applicable (always used); VDD_IO = connect directly to VDD_IO; VSS = connect directly to VSS