BL2456 datasheet(4/11 Pages) BELLING

Part #	BL2456

Description	BL2456

Download	11 Pages

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Manufacturer	BELLING [SHANGHAI BELLING CO., LTD.]

Direct Link	http://www.belling.com.cn

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4 / 11 page

4位MASK LCD型单片机芯片BL2456

http://www.belling.com.cn

- 4 -

8/24/2006

Total 11 Pages

Wrote by dipeng

INT1 is selectable.

Only INT0 is synchronized with

the system clock.

INT2

I

Quasi-interrupt with detection

of rising edge signals.

19

P1.2

Input

A-4

KS0–KS3

I/O

Quasi-interrupt

input

with

falling edge detection.

29-32

P6.0-P6.3

Input

D

CLO

I/O

CPU clock output.

23

P2.2

Input

D

BUZ

I/O

2, 4, 8 or 16 kHz frequency output

for buzzer sound with 4.19 MHz

main system clock or 32.768 kHz

subsystem clock.

24

P2.3

Input

D

XIN, XOUT

-

Crystal, ceramic or RC oscillator

pins for main system clock.

For external clock input, use XIN

and input XIN’s reverse phase to

XOUT.

12,11

-

XTIN, XTOUT

-

Crystal

oscillator

pins

for

subsystem clock.

For external clock input, use

XTIN and input XTIN’s reverse

phase to XTOUT.

14,15

-

VDD

-

Main power supply.

9

-

VSS

-

Ground.

10

-

RESET

-

Reset signal.

16

-

Input

B

TEST

-

Test signal input (must be

connected to VSS).

13

-

注：当 I / O 端口被设值为输出模式时上拉电阻自动禁止。

管脚电路图

管脚电路图：

：

Type A

Type C

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