PC7447 datasheet(58/66 Pages) ATMEL

58 / 66 page

PC7457/47 [Preliminary]

5345B–HIREL–02/04

Figure 33. JTAG Interface Connection

Notes:

1. RUN/STOP, normally found on pin 5 of the COP header, is not implemented on the PC7457. Connect pin 5 of the COP

header to OV

DD with a 10 kΩ pull-up resistor.

2. Key location; pin 14 is not physically present on the COP header.

3. Component not populated. Populate only if debug tool does not drive QACK.

4. Populate only if debug tool uses an open-drain type output and does not actively deassert QACK.

5. If the JTAG interface is implemented, connect HRESET from the target source to TRST from the COP header though an

AND gate to TRST of the part. If the JTAG interface is not implemented, connect HRESET from the target source to TRST of

the part through a 0

Ω isolation resistor.

6. Though defined as a No-Connect, it is a common and recommended practice to use pin 12 as an additional GND pin for

improved signal integrity.

HRESET

SRESET

VDD_SENSE

5(1)

2 k

Ω

10 k

Ω

10 k

Ω

10 k

Ω

OVDD

CHKSTP_IN

TMS

TDO

TDI

TCK

TMS

TDO

TDI

TCK

TRST

14(2)

Key

QACK

OVDD

TRST

10 k

Ω

10 k

Ω

10 k

Ω

10 k

Ω

OVDD

QACK

CHKSTP_OUT

KEY

No Pin

COP Connector

Physical Pin Out

10 k

Ω(4)

OVDD

2 k

Ω(3)

Ω(5)

12(6)

From Target

Board Sources

(if any)

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