W78E052D - 8-BIT MICROCONTROLLER

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W78E052D 기능

기능

8-BIT MICROCONTROLLER

제조업체

Nuvoton

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W78E054D/W78E052D Data Sheet

1 GENERAL DESCRIPTION

The W78E054D/W78E052D series is an 8-bit microcontroller which can accommodate a wider fre-

quency range with low power consumption. The instruction set for the W78E054D/W78E052D series is

fully compatible with the standard 8052.

The W78E054D/W78E052D series contains 16K/8K bytes Flash EPROM programmable by hardware

writer; a 256 bytes RAM; four 8-bit bi-directional (P0, P1, P2, P3) and bit-addressable I/O ports; an ad-

ditional 4-bit I/O port P4; three 16-bit timer/counters; a hardware watchdog timer and a serial port. The-

se peripherals are supported by 8 sources 4-level interrupt capability. To facilitate programming and

verification, the Flash EPROM inside the W78E054D/W78E052D series allows the program memory to

be programmed and read electronically. Once the code is confirmed, the user can protect the code for

security.

The W78E054D/W78E052D series microcontroller has two power reduction modes, idle mode and

power-down mode, both of which are software selectable. The idle mode turns off the processor clock

but allows for continued peripheral operation. The power-down mode stops the crystal oscillator for

minimum power consumption. The external clock can be stopped at any time and in any state without

affecting the processor. The W78E054D/W78E052D series contains In-System Programmable (ISP)

2KB LDROM for loader program, operating voltage from 3.3V to 5.5V.

Note: If the applied VDD is not stable, especially with long transition time of power on/off, it’s

recommended to apply an external RESET IC to the RST pin for improving the stability of sys-

tem.

-4-

http://www.Datasheet4U.com

W78E054D/W78E052D Data Sheet

4 PIN CONFIGURATIONS

T2, P1.0

T2EX, P1.1

P1.2

P1.3

P1.4

P1.5

P1.6

P1.7

RST

RXD, P3.0

TXD, P3.1

INT0, P3.2

INT1, P3.3

T0, P3.4

T1, P3.5

WR, P3.6

RD, P3.7

XTAL2

XTAL1

VSS

40 VDD

39 P0.0, AD0

38 P0.1, AD1

37 P0.2, AD2

36 P0.3, AD3

35 P0.4, AD4

34 P0.5, AD5

33 P0.6, AD6

32 P0.7, AD7

31 EA

30 ALE

29 PSEN

28 P2.7, A15

27 P2.6, A14

26 P2.5, A13

25 P2.4, A12

24 P2.3, A11

23 P2.2, A10

22 P2.1, A9

21 P2.0, A8

P1.5

P1.6

P1.7

RST

RXD, P3.0

INT2, P4.3

TXD, P3.1

INT0, P3.2

INT1, P3.3

T0, P3.4

T1, P3.5

PLCC 44-pin

39 P0.4, AD4

38 P0.5, AD5

37 P0.6, AD6

36 P0.7, AD7

35 EA

34 P4.1

33 ALE

32 PSEN

31 P2.7, A15

30 P2.6, A14

29 P2.5, A13

Publication Release Date: Aug 31, 2012

- 7 - Revision A12

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W78E054D/W78E052D Data Sheet

Pin Description, continued

SYMBOL

P3.0P3.7

P4.0P4.3

TYPE DESCRIPTIONS

PORT 3: Port 3 is a bi-directional I/O port with internal pull-ups. All bits have al-

ternate functions, which are described below:

RXD (P3.0): Serial Port 0 input

TXD (P3.1): Serial Port 0 output

INT0 (P3.2) : External Interrupt 0

I/O H INT1 (P3.3) : External Interrupt 1

T0 (P3.4) : Timer 0 External Input

T1 (P3.5) : Timer 1 External Input

WR (P3.6) : External Data Memory Write Strobe

RD (P3.7) : External Data Memory Read Strobe

PORT 4: Another bit-addressable bidirectional I/O port P4. P4.3 and P4.2 are

I/O H alternative function pins. It can be used as general I/O port or external interrupt

input sources ( INT2 / INT3 ).

* Note: TYPE I: input, O: output, I/O: bi-directional, H: pull-high, L: pull-low, D: open drain.

In application if MCU pins need external pull-up, it is recommended to add a pull-up resistor

(10K) between pin and power (VDD) instead of directly wiring pin to VDD for enhancing EMC.

- 10 -

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부품번호	상세설명 및 기능	제조사
W78E052C	8-Bit Microcontroller	Winbond Electronics
W78E052D	8-BIT MICROCONTROLLER	Nuvoton

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