PIC32MX795F512LT-80ISLASHPF datasheet(45/256 Pages) MICROCHIP

45 / 256 page

DS61156G-page 45

PIC32MX5XX/6XX/7XX

2.5

ICSP Pins

The PGECx and PGEDx pins are used for In-Circuit

Serial Programming™ (ICSP™) and debugging pur-

poses. It is recommended to keep the trace length

between the ICSP connector and the ICSP pins on the

device as short as possible. If the ICSP connector is

expected to experience an ESD event, a series resistor

is recommended, with the value in the range of a few

tens of Ohms, not to exceed 100 Ohms.

Pull-up resistors, series diodes and capacitors on the

PGECx and PGEDx pins are not recommended as they

will interfere with the programmer/debugger communi-

cations to the device. If such discrete components are

an application requirement, they should be removed

from the circuit during programming and debugging.

Alternatively, refer to the AC/DC characteristics and

timing requirements information in the respective

device Flash programming specification for information

on capacitive loading limits and pin input voltage high

(VIH) and input low (VIL) requirements.

Ensure that the “Communication Channel Select” (i.e.,

PGECx/PGEDx pins) programmed into the device

matches the physical connections for the ICSP to

MPLAB® ICD 2, MPLAB® ICD 3 or MPLAB® REAL

ICE™.

For more information on ICD 2, ICD 3 and REAL ICE

connection requirements, refer to the following

documents that are available on the Microchip web

site.

• “MPLAB® ICD 2 In-Circuit Debugger User’s

Guide” DS51331

• “Using MPLAB® ICD 2” (poster) DS51265

• “MPLAB® ICD 2 Design Advisory” DS51566

• “Using MPLAB® ICD 3” (poster) DS51765

• “MPLAB® ICD 3 Design Advisory” DS51764

• “MPLAB® REAL ICE™ In-Circuit Emulator User’s

Guide” DS51616

• “Using MPLAB® REAL ICE™ Emulator” (poster)

DS51749

2.6

JTAG

The TMS, TDO, TDI and TCK pins are used for testing

and debugging according to the Joint Test Action

Group (JTAG) standard. It is recommended to keep the

trace length between the JTAG connector and the

JTAG pins on the device as short as possible. If the

JTAG connector is expected to experience an ESD

event, a series resistor is recommended, with the value

in the range of a few tens of Ohms, not to exceed 100

Ohms.

Pull-up resistors, series diodes and capacitors on the

TMS, TDO, TDI and TCK pins are not recommended

as they will interfere with the programmer/debugger

communications to the device. If such discrete compo-

nents are an application requirement, they should be

removed from the circuit during programming and

debugging. Alternatively, refer to the AC/DC character-

istics and timing requirements information in the

respective device Flash programming specification for

information on capacitive loading limits and pin input

voltage high (VIH) and input low (VIL) requirements.

2.7

Trace

The trace pins can be connected to a hardware-trace-

enabled programmer to provide a compress real time

instruction trace. When used for trace the TRD3,

TRD2, TRD1, TRD0 and TRCLK pins should be

dedicated for this use. The trace hardware requires

a22

Ω series resistor between the trace pins and the

trace connector.

PIC32MX795F512LT-80I/PF датащи(PDF) 45 Page - Microchip Technology

PIC32MX795F512LT-80I/PF датащи(HTML) 45 Page - Microchip Technology

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

датащи скачать

ссылки URL