DSP56KFAMUM/AD(1996) View Datasheet(PDF) - Motorola => Freescale

Part Name

Description

Manufacturer

DSP56KFAMUM/AD
(Rev.:1996)

24-BIT DIGITAL SIGNAL PROCESSOR

Motorola => Freescale 

Signal/Pin Descriptions

Synchronous Serial Interface Port

SYNCHRONOUS SERIAL INTERFACE PORT

Table 1-11 Synchronous Serial Interface (SSI) Signals

Signal Name

Signal

Type

State

during

Reset

Signal Description

SC0

Input Tri-

Serial Clock 0 (SC0)—This signal’s function is determined by

or stated whether the SCLK is in Synchronous or Asynchronous mode.

Output

• In Synchronous mode, this signal is used as a serial I/O

flag.

• In Asynchronous mode, this signal receives clock I/O.

PC3

Port C GPIO 3 (PC3)—This signal is a GPIO signal called PC3

when the SSI SC0 function is not being used.

After reset, the default state is GPIO input.

SC1

Input Tri-

Serial Clock 1 (SC1)—The SSI uses this bidirectional signal to

or stated control flag or frame synchronization. This signal’s function is

Output

determined by whether the SCLK is in Synchronous or

Asynchronous mode.

• In Asynchronous mode, this signal is frame sync I/O.

• For Synchronous mode with continuous clock, this

signal is a serial I/O flag and operates like the SC0.

SC0 and SC1 are independent serial I/O flags but may be used

together for multiple serial device selection.

PC4

Port C GPIO 4 (PC4)—This signal is a GPIO signal called PC4

when the SSI SC1 function is not being used.

After reset, the default state is GPIO input.

SC2

Input Tri-

Serial Clock 2 (SC2)—The SSI uses this bidirectional signal to

or stated control frame synchronization only. As with SC0 and SC1, its

Output

function is defined by the SSI operating mode.

PC5

Port C GPIO 5 (PC5)—This signal is a GPIO signal called PC5

when the SSI SC1 function is not being used.

After reset, the default state is GPIO input.

MOTOROLA

DSP56002/D, Rev. 3

1-15

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