beautypg.com

Outline, Connecting the oscillator circuit pattern – Renesas PCA7757 User Manual

Page 4

background image

(2/4)

1. Outline


The PCA7757 is a converter board from 64-pin FLGA (64F0G) 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

57

23

22

(1)

(2)

(3)

24

Figure 1 Connections when using the C1

SG-51P

IC2

1

7

8

14

IC1-22

C1

VCC

5
6

GND

IC1-57

IC1-24

Figure 2 Connection diagram when using the C1