MC68HC68 데이터 시트보기 (PDF) - Motorola => Freescale

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MC68HC68

Real-Time Clock plus RAM with Serial Interface

Motorola => Freescale 

AC LINE

BRIDGE/

REGULATOR

NC

RCHARGE

100 kΩ

0.1 mF

13

10

POR

VBATT

16

VDD

12

VSYS

(EPS)

ENABLED

POWER

SUPPLY

40

VDD

NOTE 1

PSE 9

14

MC68HC68T1

XTAL

15

CPUR 2

VDD NOTE 2

MC68HC05C4

1 RESET

11 LINE

INT 3

1

CLKOUT

SS 7

VSS

SPI

8

2

39

IRQ

OSC 1

28 PORT

3

SPI VSS

20

NOTES:

1. See Figure 12 for 32.768 kHz operation. This configuration, where the MC68HC68T1 supplies the MCU clock,

usually requires a 1 to 4 MHz crystal.

2. If an MC68HC11 MCU is used, delete the capacitor at the RESET pin.

Figure 20. Rechargeable Battery–Backup System

MOTOROLA

MC68HC68T1

21

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