DSP56857E datasheet(16/53 Pages) FREESCALE

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56857 Technical Data, Rev. 6

Freescale Semiconductor

TXD0

GPIOE1

Output(Z)

Input/Output

Serial Transmit Data 0 (TXD0)—This signal transmits data from the SCI

0 transmit data register.

Port E GPIO (1)—This pin is a General Purpose I/O (GPIO) pin that can

individually be programmed as input or output pin.

RXD1

GPIOE2

Input

Input/Output

Serial Receive Data 1 (RXD1)—This input receives byte-oriented serial

data and transfers it to the SCI 1 receive shift register.

Port E GPIO (2)—This pin is a General Purpose I/O (GPIO) pin that can

individually be programmed as input or output pin.

TXD1

GPIOE3

Output(Z)

Input/Output

Serial Transmit Data 1 (TXD1)—This signal transmits data from the SCI

1 transmit data register.

Port E GPIO (3)—This pin is a General Purpose I/O (GPIO) pin that can

individually be programmed as input or output pin.

STD0

GPIOC0

Output

Input/Output

ESSI Transmit Data (STD0)—This output pin transmits serial data from

the ESSI Transmitter Shift Register.

Port C GPIO (0)—This pin is a General Purpose I/O (GPIO) pin when the

ESSI is not in use.

SRD0

GPIOC1

Input

Input/Output

ESSI Receive Data (SRD0)—This input pin receives serial data and

transfers the data to the ESSI Receive Shift Register.

Port C GPIO (1)—This pin is a General Purpose I/O (GPIO) pin when the

ESSI is not in use.

SCK0

GPIOC2

Input/Output

ESSI Serial Clock (SCK0)—This bidirectional pin provides the serial bit

rate clock for the transmit section of the ESSI. The clock signal can be

continuous or gated and can be used by both the transmitter and receiver

in synchronous mode.

Port C GPIO (2)—This pin is a General Purpose I/O (GPIO) pin when the

ESSI is not in use.

SC00

GPIOC3

Input/Output

ESSI Serial Control Pin 0 (SC00)—The function of this pin is determined

by the selection of either synchronous or asynchronous mode. For

asynchronous mode, this pin will be used for the receive clock I/O. For

synchronous mode, this pin is used either for transmitter1 output or for

serial I/O flag 0.

Port C GPIO (3)—This pin is a General Purpose I/O (GPIO) pin when the

ESSI is not in use.

Table 3-1 56857 Signal and Package Information for the 100-pin LQFP (Continued)

Pin No.

Signal Name

Type

Description

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