P80CL410HFT datasheet(9/60 Pages) PHILIPS

Part #	P80CL410HFT

Description	Low voltage 8-bit microcontrollers with I2C-bus

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Manufacturer	PHILIPS [NXP Semiconductors]

Direct Link	http://www.nxp.com

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9 / 60 page

1997 Apr 10

9

Philips Semiconductors

Product speciﬁcation

Low voltage 8-bit microcontrollers with

I2C-bus

P80CL410; P83CL410

ALE

30

27

Address Latch Enable. Output pulse for latching the low byte of the

address during access to external memory. ALE is emitted at a constant

rate of 1

⁄6 × fosc, and may be used for external timing or clocking purposes

(assuming MOVX instructions are not used).

EA

31

29

External Access. When EA is held HIGH the CPU executes out of internal

program memory (unless the program counter exceeds 0FFFH). Holding

EA LOW forces the CPU to execute out of external memory regardless of

the value of the program counter.

P0.0 to P0.7

AD0 to AD7

39 to 32

30 to 37

• Port 0: 8-bit open-drain bidirectional I/O port. As an open-drain output

port it can sink 8 LS TTL loads. Port 0 pins that have logic 1s written to

them float, and in that state will function as high impedance inputs.

• Low-order addressing: Port 0 is also the multiplexed low-order address

and data bus during access to external memory. The strong internal

pull-ups are used while emitting logic 1s within the low order address.

VDD

40

38

Power supply.

n.c.

−

6, 17, 28

and 39

Not connected.

SYMBOL

DESCRIPTION

DIP40

VSO40

QFP44

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P80CL410HFT Datasheet(PDF) 9 Page - NXP Semiconductors

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