ADSP-TS101S datasheet(6/48 Pages) AD

6 / 48 page

Rev. C

Page 6 of 48

May 2009

ADSP-TS101S

EXTERNAL PORT

(OFF-CHIP MEMORY/PERIPHERALS INTERFACE)

The ADSP-TS101S processor’s external port provides the pro-

cessor’s interface to off-chip memory and peripherals. The

4G word address space is included in the DSP’s unified address

space. The separate on-chip buses—three 128-bit data buses and

three 32-bit address buses—are multiplexed at the external port

to create an external system bus with a single 64-bit data bus

and a single 32-bit address bus. The external port supports data

transfer rates of 800M bytes per second over external bus.

The external bus can be configured for 32- or 64-bit operation.

When the system bus is configured for 64-bit operation, the

lower 32 bits of the external data bus connect to even addresses,

and the upper 32 bits connect to odd addresses.

The external port supports pipelined, slow, and SDRAM proto-

cols. Addressing of external memory devices and memory-

mapped peripherals is facilitated by on-chip decoding of high-

order address lines to generate memory bank select signals.

The ADSP-TS101S provides programmable memory, pipeline

depth, and idle cycle for synchronous accesses, and external

acknowledge controls to support interfacing to pipelined or

slow devices, host processors, and other memory-mapped

peripherals with variable access, hold, and disable time

requirements.

Figure 3. Memory Map

RESERVED

RESERV ED

INTE RNAL REG ISTERS (UREGS )

INTERNAL MEMORY 2

INTERNAL MEMORY 1

INTERNAL MEMORY 0

0x003FFFFF

0x00300000

0x00280000

0x00200000

0x001807FF

0x00180000

0x0010FFFF

0x00100000

0x0008FFFF

0x00080000

0x0000FFFF

0x00000000

INTERNAL SPACE

PROCESSOR ID 7

PROCESSOR ID 6

PROCESSOR ID 5

PROCESSOR ID 4

PROCESSOR ID 3

PROCESSOR ID 2

PROCESSOR ID 1

PROCESSOR ID 0

BROADCAST

HOST

(

MSH)

BANK 1

(

MS1)

BANK 0

(

MS0)

SDRAM

(

MSSD)

INTERNAL MEMORY

0x10000000

0x0C000000

0x08000000

0x04000000

0x03C00000

0x03800000

0x03400000

0x03000000

0x02C00000

0x02800000

0x02400000

0x02000000

0x01C00000

0x003FFFFF

0x00000000

GLOBAL SPACE

0xFFFFFFFF

EACH IS A COPY

OF INTERNAL SPACE

RESERVED

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