DSP56857E datasheet(18/53 Pages) FREESCALE

18 / 53 page

56857 Technical Data, Rev. 6

Freescale Semiconductor

SC11

GPIOD4

Input/Output

ESSI Serial Control Pin 1 (SC11)—The function of this pin is determined

by the selection of either synchronous or asynchronous mode. For

asynchronous mode, this pin is the receiver frame sync I/O. For

synchronous mode, this pin is used either for transmitter2 output or for

serial I/O flag 1.

Port D GPIO (4)—This pin is a General Purpose I/O (GPIO) pin when the

ESSI is not in use.

SC12

GPIOD5

Input/Output

ESSI Serial Control Pin 2 (SC12)—This pin is used for frame sync I/O.

SC02 is the frame sync for both the transmitter and receiver in

synchronous mode and for the transmitter only in asynchronous mode.

When configured as an output, this pin is the internally generated frame

sync signal. When configured as an input, this pin receives an external

frame sync signal for the transmitter (and the receiver in synchronous

operation).

Port D GPIO (5)—This pin is a General Purpose I/O (GPIO) pin when the

ESSI is not in use.

1MISO

GPIOF0

Input/Output

SPI Master In/Slave Out (MISO)—This serial data pin is an input to a

master device and an output from a slave device. The MISO line of a

slave device is placed in the high-impedance state if the slave device is

not selected. The driver on this pin can be configured as an open-drain

driver by the SPI’s Wired-OR mode (WOM) bit when this pin is configured

for SPI operation.

Port F GPIO (0)—This pin is a General Purpose I/O (GPIO) pin that can

individually be programmed as input or output pin.

2MOSI

GPIOF1

Input/

Output (Z)

Input/Output

SPI Master Out/Slave In (MOSI)—This serial data pin is an output from a

master device and an input to a slave device. The master device places

data on the MOSI line a half-cycle before the clock edge that the slave

device uses to latch the data. The driver on this pin can be configured as

an open-drain driver by the SPI’s WOM bit when this pin is configured for

SPI operation.

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

be individually programmed as input or output pin.

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

Pin No.

Signal Name

Type

Description

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