DSP56857 查看數據表（PDF） - Freescale Semiconductor

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DSP56857

16-bit Digital Signal Controllers

Freescale Semiconductor 

Introduction

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

Pin No. Signal Name

Type

Description

96

SC01

Input/Output ESSI Serial Control Pin 1 (SC01)—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.

GPIOC4

Input/Output

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

ESSI is not in use.

97

SC02

Input/Output ESSI Serial Control Pin 2 (SC02)—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).

GPIOC5

Input/Output

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

ESSI is not in use.

66

STD1

Output

ESSI Transmit Data (STD1)—This output pin transmits serial data from

the ESSI Transmitter Shift Register.

GPIOD0

Input/Output

Port D GPIOD0—This pin is a General Purpose I/O (GPIO) pin when the

ESSI is not in use.

67

SRD1

Input

ESSI Receive Data (SRD1)—This input pin receives serial data and

transfers the data to the ESSI Receive Shift Register.

GPIOD1

Input/Output

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

ESSI is not in use.

68

SCK1

Input/Output ESSI Serial Clock (SCK1)—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.

GPIOD2

Input/Output

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

ESSI is not in use.

69

SC10

Input/Output ESSI Serial Control Pin 0 (SC10)—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.

GPIOD3

Input/Output

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

ESSI is not in use.

56857 Technical Data, Rev. 6

Freescale Semiconductor

17

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