DSM2190F4 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

DSM2190F4

DSM (Digital Signal Processor System Memory) For Analog Devices ADSP-2191 DSPs (3.3V Supply)

STMicroelectronics 

DSM2190F4

DECODE PLD (DPLD)

The DPLD, shown in Figure 14, is used for decod-

ing the address for internal and external compo-

nents. The DPLD can be used to generate the

following decode signals:

s 8 Main Flash memory Sector Select (FS0-FS7)

signals with three product terms each

s 4 Secondary Flash memory Sector Select

(CSBOOT0-CSBOOT3) signals with three

product terms each

s 1 internal csiop select for DSM device control

and status registers (csiop is the base address

of the block of 256 byte locations)

s 1 JTAG Select signal (enables JTAG operations

on Port C when multiplexing JTAG signals with

general I/O signals)

s 3 external chip select output signals for Port D

pins, each with one product term.

Figure 14. DPLD Logic Array

I/O PORTS (PORT AB, ,C)

(INPUTS)

(16)

MCELLAB.FB [7:0] (Feedback)

(8)

MCELLBC.FB [7:0] (Feedback)

(8)

PG0-PG7

(8)

A[15:0]

(16)

PD[2:0]

(3)

CNTRL[2:0] (Read/Write Control Signals)(3)

RESET

(1)

RD_BSY

(1)

3

CSBOOT0

3

CSBOOT1 4 Secondary

Flash Memory

3

Sector Selects

CSBOOT2

3

CSBOOT3

3

FS0

3

FS1

3

FS2

3

8 Flash Main

FS3 Memory

3

Sector Selects

FS4

3

FS5

3

FS6

3

FS7

1

CSIOP

I/O Decoder

Select

1

JTAGSEL JTAG ISP

1

ECS0

1

ECS1

External Chip Selects

to PORT D

1

ECS2

AI04958

25/61

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