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3

PIIPM50P12B004

I27146 01/03

Signal pins on RS422 serial port

Symbol

Lead Description

Pin number

Vin iso

External 5V supply voltage for opto-couplers and line driver supply

6

GND iso

Extenal 5V supply ground reference for opto-couplers and line driver supply

7

Tx+

RS422 Trasmitter Non inverting Driver Output

1

Tx-

RS422 Trasmitter Inverting Driver Output

2

Rx+

RS422 Receiver Non inverting Driver Input,

4

Rx-

RS422 Receiver Inverting Driver Input

3

Enc1 – Hall1 / SpiCK

Incremental Encoder 1 / Hall effect sensor input 1/ SpiCK input (GND iso referenced)

5

Enc2 – Hall2 / SpiSTE Incremental Encoder 2 / Hall effect sensor input 2 / SpiSTE input (GND iso referenced)

9

Strb – Hall3 / SpiRx

Incremental Encoder Strobe / Hall effect sensor input 3 / SpiRx input (GND iso ref.)

10

SpiTx

SpiTx output (GND iso referenced)

8

Vin

External 15V supply voltage. Internally referred to DC bus minus pin (DC -)

17-18

COM

External 15V supply ground reference. This pin is directly connected to DC -

19-20

RS422

serial

port

Signal pins on IEEE1149.1 JTAG connector

Symbol

Lead Description

State

Pin number

TMS

JTAG test mode select

Input

12

TMS2

JTAG test mode select 2

Input

5-6

TDI

JTAG test data input

Input

14

TDO

JTAG test data output

Output

13

TCK

JTAG test clock. TCK is a 10MHz clock source from the emulation pod. This

signal can be used to drive the system test clock.

Input

15

TRST~

JTAG test reset

Input

11

EMU0

Emulation pin 0

I/O

9-10

EMU1/OFF~

Emulation pin 1

I/O

7-8

PD

Presence detect.

Indicates that the emulation cable is connected and that the PI-IPM logic is

powered up. PD is tied to the DSP 3.3V supply through a 1k resistor.

Output

1

TCK_RET

JTAG test clock return. Test clock input to the emulator.

Internally short circuited to TCK.

Output

16

Boot-En

Boot ROM enable. This pin is sampled during DSP reset, pulling it low

enables DSP boot ROM (Flash versions only). 47k internal pull up.

Input

17

COM

External 15V supply ground reference. This pin is directly connected to DC -

N/A

20

IEEE1149.1

JTAG