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W78E052D 데이터시트 PDF




Nuvoton에서 제조한 전자 부품 W78E052D은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


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부품번호 W78E052D 기능
기능 8-BIT MICROCONTROLLER
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W78E052D 데이터시트, 핀배열, 회로
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-
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W78E052D pdf, 반도체, 판매, 대치품
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
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
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
7
8
9
10
11
12
13
14
15
16
17
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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W78E052D 전자부품, 판매, 대치품
W78E054D/W78E052D Data Sheet
Pin Description, continued
SYMBOL
P3.0P3.7
P4.0P4.3
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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