UPSD3312D datasheet(236/272 Pages) STMICROELECTRONICS

236 / 272 page

Obsolete

Product(s)

- Obsolete

Product(s)

Obsolete

Product(s)

- Obsolete

Product(s)

PSD module

UPSD33xx

236/272

Doc ID 9685 Rev 7

27.5.4

4-pin JTAG ISP (default)

The four basic JTAG pins on Port C are enabled for JTAG operation at all times. These pins

may not be used for other I/O functions. There is no action needed in PSDsoft Express to

configure a device to use 4-pin JTAG, as this is the default condition. No 8032 firmware is

needed to use 4-pin ISP because all ISP functions are controlled from the external JTAG

program/test equipment. Figure 80 on page 236 shows recommended connections on a

circuit board to a JTAG program/test tool using 4-pin JTAG. It is required to connect the RST

output signal from the JTAG program/test equipment to the RESET_IN input on the

UPSD33xx. The RST signal is driven by the equipment with an Open Drain driver, allowing

other sources (like a push button) to drive RESET_IN without conflict.

Note:

The recommended pull-up resistors and decoupling capacitor are illustrated in Figure 80.

Figure 80.

Recommended 4-pin JTAG connections

For 5 V UPSD33xx devices, pull-up resistors and VCC pin on the JTAG connector should be connected to 5 V system VDD.

For 3.3 V UPSD33xx devices, pull-up resistors and VCC pin on the JTAG connector should be connected to 3.3 V system

VCC.

This signal is driven by an Open-Drain output in the JTAG equipment, allowing more than one source to activate RESETIN.

TMS - PC0

TCK - PC1

I/O - PC2

GENERAL I/O - PC3

GENERAL I/O - PC4

TDI - PC5

TDO - PC6

GENERAL I/O - PC7

JTAG

CONN.

100k

typical

TMS

TCK

TDI

TDO

GENERAL I/O

SIGNALS

GND

VCC

(1,2)

RST

(3)

UPSD33XX

0.01

µF

CIRCUIT

BOARD

JTAG

Programming

or Test

Equipment

Connects Here

10k

PUSH BUTTON

or ANY OTHER

RESET SOURCE

DEBUG

OPTIONAL

TEST POINT

100k

RESETIN

AI09185c

UPSD3312D bảng dữ liệu(PDF) 236 Page - STMicroelectronics

UPSD3312D bảng dữ liệu(HTML) 236 Page - STMicroelectronics

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

bảng dữ liệu tải về

Link URL