DSP56852PB View Datasheet(PDF) - Motorola => Freescale

Part Name

Description

Manufacturer

DSP56852PB

16-bit Digital Signal Processor

Motorola => Freescale 

Freescale Semiconductor, Inc.

Introduction

Table 3. DSP56852 Signal and Package Information for the 81-pin MAPBGA

Pin No.

D3

Signal Name

CS1

Type

Output

Description

Chip Select 1 (CS1) —When enabled, a CSx signal is

asserted for external memory accesses that fall within a

programmable address range.

GPIOA1

Input/Output Port A GPIO (1) —A general purpose IO pin.

C3

CS2

Output

Chip Select 2 (CS2)—When enabled, a CSx signal is

asserted for external memory accesses that fall within a

programmable address range.

GPIOA2

Input/Output Port A GPIO (2) —A general purpose IO pin.

G7

D0

Input/Output Data Bus (D0–D12) —specify the data for external program or

H7

D1

data memory accesses. D0–D15 are tri-stated when the

external bus is inactive.

H8

D2

G8

D3

H9

D4

F8

D5

F7

D6

G6

D7

E8

D8

E7

D9

E6

D10

D8

D11

D7

D12

D9

D13

Input/Output Data Bus (D13–D15) — specify the data for external program

MODE A

or data memory accesses. D0–D15 are tri-stated when the

C8

D14

external bus is inactive.

MODE B

Mode Select—During the bootstrap process the MODE A,

A9

D15

MODE B, and MODE C pins select one of the eight

MODE C

bootstrap modes. These pins are sampled at the end of

reset.

Note: Any time POR and EXTERNAL resets are active, the

state of MODE A, B and C pins get asynchronously

transferred to the SIM Control Register [14:12] ($1FFF08)

respectively. These bits determine the mode in which the

part will boot up.

E2

RD

Output

Note: Software and COP resets do not update the SIM

Control Register.

Bus Control– Read Enable (RD)—is asserted during

external memory read cycles. When RD is asserted low,

pins D0–D15 become inputs and an external device is

enabled onto the DSP data bus. When RD is deasserted

high, the external data is latched inside the DSP. RD can be

connected directly to the OE pin of a Static RAM or ROM.

DSP56852 Technical Data

9

Preliminary

For More Information On This Product,

Go to: www.freescale.com

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