Analog Devices ADSP-TS201S specifications Pin Definitions-External Port DMA/Flyby, Makes

Models: ADSP-TS201S

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ADSP-TS201S

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Table 7. Pin Definitions—External Port DMA/Flyby

 

 

 

 

 

 

 

 

 

 

Signal

 

Type

Term

Description

 

 

 

 

 

 

 

 

I/A

epu

DMA Request Pins. Enable external I/O devices to request DMA services from the DSP.

 

 

DMAR3–0

 

 

 

 

 

 

 

 

 

In response to

DMARx,

the DSP performs DMA transfers according to the DMA

 

 

 

 

 

 

 

 

 

channel’s initialization. The DSP ignores DMA requests from uninitialized channels.

 

 

 

 

 

 

 

O/T

nc

I/O Write. When a DSP DMA channel initiates a flyby mode read transaction, the DSP

IOWR

 

 

 

 

 

 

 

(pu_0)

 

asserts the

IOWR

signal during the data cycles. This assertion makes the I/O device

 

 

 

 

 

 

 

 

 

sample the data instead of the TigerSHARC.

 

 

 

 

 

 

O/T

nc

I/O Read. When a DSP DMA channel initiates a flyby mode write transaction, the DSP

IORD

 

 

 

 

 

 

 

(pu_0)

 

asserts the

IORD

signal during the data cycle. This assertion with the

IOEN

makes the

 

 

 

 

 

 

 

 

 

I/O device drive the data instead of the TigerSHARC.

 

 

 

 

 

O/T

nc

I/O Device Output Enable. Enables the output buffers of an external I/O device for fly-

IOEN

 

 

 

 

 

 

 

(pu_0)

 

by transactions between the device and external memory. Active on flyby

 

 

 

 

 

 

 

 

 

transactions.

 

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 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 kΩ. For more pull-down and pull-up information, see Electrical Characteristics on Page 22.

Term (termination of unused pins) column symbols: epd = external pull-down approximately 5 kΩ to VSS; epu = external pull-up approx- imately 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

Rev. C Page 15 of 48 December 2006

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Analog Devices ADSP-TS201S Pin Definitions-External Port DMA/Flyby, DSP performs DMA transfers according to the DMA, Makes