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Outline, Connecting the oscillator circuit pattern – Renesas Converter Board PCA7758 User Manual

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1. Outline


The PCA7758 is a converter board from 36-pin 0.5-mm-pitch QFN (36PJW-A) to standard-pitch (2.54-mm). The pins
correspond one-to-one.

2. Connecting the Oscillator Circuit Pattern

Take notice that the processing depends on whether or not the IC1 (oscillator module) is used.

(1) When the IC1 (oscillator module) is used
Recommended oscillator module: SG-51P (Seiko Epson Corporation)
When using the IC1, the following processing is necessary (see (1) to (3) in Figure 1).

(1) Supply VCC and GND.
(2) Connect the OUT pin to the XIN pin.
(3) Install a bypass capacitor at the C1.

C1

IC2

Rf

XTAL1

Rd

Vcc

GND

1

8

C2

C3a

C3b

8

12

11

(1)

(2)

(3)

Figure 1 Connections when using the C1

SG-51P

IC2

1

7

8

14

IC1-11

C1

VCC

5
6

GND

IC1-8

IC1-13

Figure 2 Connection diagram when using the C1