CY3900I / CY3950I
Document #: 38-03009 Rev. *C
Page 2 of 4
Table 1 describes the function of each of these pins on the
C3ISR and USBISR Programming Cables. An OUTPUT is
provided by the PC and an INPUT is provided by the target
system.
The dimensions of the male connector required for the C3ISR
and the USBISR Programming Cables are given below.
Male Connector
2 x 5 = 2 rows, 5 pins per row
Measuring from center of the pins, each pin is 0.1” from the
others.
Pin length is 0.23”.
Pin cross-section is 0.025” x 0.025”.
Part Number
Digi-Key® S2012-05-ND (straight-pin connector).
Digi-Key S2112-05-ND (right-angle connector).
To facilitate easy and quick prototyping of designs, a
Delta39K/Ultra37000 Prototype Board[4] has been included in
the CY3900i Delta39/Ultra37000 ISR Programming Kit. The
prototype board comes with a CY37256VP160 device and a
CY39100V208 device already premounted and header strips
that facilitate signal testing. Detailed information on the board
layout and proper usage may be found in the Cypress appli-
cation note, Using the Delta39K ISR Prototype Board.
In-System Reprogrammable™ (ISR™) Programming (using USBISR cable[3])
VCC
Designer’s
Board
USB 1.1 / USB 2.0 Port
10-pin ISR Connector
PC
Device
Device
Cypress
Cypress
10-pin
USB
Cable
Table 1. C3ISR / USBISR Cable Pin Descriptions
Pin
Type
Description
JTAGen
OUTPUT
In System Reprogramming JTAG Enable (active HIGH).
ISR*
OUTPUT
In System Reprogramming Enable Indicator (active LOW).
VCC
INPUT
+5V and +3.3V Supply Voltage provided from the target system to the cable.
TDO
INPUT
Test Data Output Receiver. The TDO output pin of the last device in the ISR chain of
the system is connected to this input pin.
TMS
OUTPUT
Test Mode Control. This is the mode select control input for the TAP controller state
machine contained in the ISR interface.
TCK
OUTPUT
Test Clock. ISR interface clock.
TDI
OUTPUT
Test Data Input Driver. This output pin is connected to the TDI input of the first device
in the ISR chain.
NC
NC
No Connect.
GND
—
Zero volt common ground for PC and target system.
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