UPSD3354DV-40U6 Datasheet, PDF (239/272 Pages) STMicroelectronics – fast 8032 MCU with programmable logic

UPSD33xx
PSD module
27.5.6
Recommended JTAG connector
There is no industry standard JTAG connector. STMicroelectronics recommends a specific
JTAG connector and pinout for UPSD3xxx so programming and debug equipment will easily
connect to the circuit board. The user does not have to use this connector if there is a
different connection scheme.
The recommended connector scheme can accept a standard 14-pin ribbon cable connector
(2 rows of 7 pins on 0.1” centers, 0.025” square posts, standard keying) as shown in
Figure 82. See the STMicroelectronics FlashLINK, FL-101 User Manual for more
information.
Figure 82. Recommended JTAG connector
VIEW: Looking into face of shrouded
14
13
male connector, with 0.025"
posts on 0.1" centers.
TERR TDO
Connector reference:
12
11
Molex 70247-1401
GND TCK
) 10
9
t(s ^{GND TMS}
8
7
uc ^{RST VCC}
d ₆
5
ro ^{TSTAT TDI}
KEY
WAY
P ₄
3
CNTL GND
lete ²
1
TRST JEN
This connector accepts a 14-pin
ribbon cable such as:
• Samtec:
HCSD-07-D-06.00-01-S-N
• Digikey:
M3CCK-14065-ND
bso AI09187
Obsolete ^{Product(s) - O 27.5.7}
Chaining UPSD33xx devices
It is possible to chain a UPSD33xx device with other UPSD33xx devices on a circuit board,
and also chain with IEEE 1149.1 compliant devices from other manufacturers. Figure 83 on
page 240 shows a chaining example. The TDO of one device connects to the TDI of the next
device, and so on. Only one device is performing JTAG operations at any given time while
the other two devices are in BYPASS mode. Configuration for JTAG chaining can be made in
PSDsoft Express by choosing “More than one device” when prompted about chaining
devices. Notice in Figure 83 on page 240 that the UPSD33xx devices are chained
externally, but also be aware that the two die within each UPSD33xx device are chained
internally. This internal chaining of die is transparent to the user and is taken care of by
PSDsoft Express and 3rd party JTAG tool software.
The example in Figure 83 on page 240 also shows how to use 6-pin JTAG when chaining
devices. The signals TSTAT and TERR are configured as open-drain type signals from
PSDsoft Express. This facilitates a wired-OR connection of TSTAT signals from multiple
UPSD33xx devices and also a wired-OR connection of TERR signals from those same
multiple devices. PSDsoft Express puts TSTAT and TERR signals into open-drain mode by
default, requiring external pull-up resistors. Click on 'Properties' in the JTAG-ISP window of
PSDsoft Express to change to standard CMOS push-pull outputs if desired, but wired-OR
logic is not possible in CMOS output mode.
Doc ID 9685 Rev 7
239/272