DSP56857 datasheet(83/662 Pages) FREESCALE

83 / 662 page

Power, Ground and Peripheral Signals

Overview, Rev. 4

Freescale Semiconductor

2-15

RESET

Input

Reset—This input is a direct hardware reset on the

processor. When RESET is asserted low, the

device is initialized and placed in the Reset state.

A Schmitt trigger input is used for noise immunity.

When the RESET pin is deasserted, the initial chip

operating mode is latched from the MODA, MODB,

and MODC pins.

To ensure complete hardware reset, RESET and

TRST should be asserted together. The only

exception occurs in a debugging environment

when a hardware device reset is required and it is

necessary not to reset the JTAG/EOnCE module.

In this case, assert RESET. Do not assert TRST.

RSTO

Output

Reset Output—This output is asserted on any

reset condition (external reset, low voltage,

software, or COP).

Table 2-9. Serial Communication Interface 0

Signal Name

Signal Type

Signal Description

853

Pins

854

Pins

855

Pins

857

Pins

858

Pins

RXDO

(GPIOE0)

Input

Input / Output

Serial Receive Data 0—This input receives

byte-oriented serial data and transfers it to the

SCI0 receive shift receiver.

Port E GPIO 0—This is a General Purpose I/O pin

capable of being independently programmed as an

input or output pin.

TXDO

(GPIOE1)

Output(Z)

Input / Output

Serial Transmit Data 0—This signal transmits

data from the SCI0 transmit data register.

Port E GPIO 1—This is a General Purpose I/O pin

capable of being independently programmed as an

input or output pin.

Table 2-8. Interrupt and Program Control (Continued)

Signal Name

Signal Type

Signal Description

853

Pins

854

Pins

855

Pins

857

Pins

858

Pins

DSP56857 Fiches technique(PDF) 83 Page - Freescale Semiconductor, Inc

DSP56857 Fiches technique(HTML) 83 Page - Freescale Semiconductor, Inc

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Fiches technique Télécharger

Lien URL