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W78C052D 데이터시트 PDF




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부품번호 W78C052D 기능
기능 8-BIT MICROCONTROLLER
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W78C052D 데이터시트, 핀배열, 회로
W78C52D/W78C052D
www.DataSheet4U.com
8-BIT MICROCONTROLLER
Table of Contents-
1. GENERAL DESCRIPTION ......................................................................................................... 2
2. FEATURES ................................................................................................................................. 2
3. PIN CONFIGURATIONS ............................................................................................................ 3
4. PIN DESCRIPTION..................................................................................................................... 4
5. FUNCTIONAL DESCRIPTION ................................................................................................... 6
6. ABSOLUTE MAXIMUM RATINGS ........................................................................................... 10
7. DC CHARACTERISTICS.......................................................................................................... 11
8. AC CHARACTERISTICS .......................................................................................................... 13
9. TIMING WAVEFORMS ............................................................................................................. 15
10. APPLICATION CIRCUITS ........................................................................................................ 17
11. PACKAGE DIMENSIONS ......................................................................................................... 19
12. REVISION HISTORY ................................................................................................................ 21
Publication Release Date: December 4, 2006
- 1 - Revision A5




W78C052D pdf, 반도체, 판매, 대치품
W78C52D/W78C052D
4. PIN DESCRIPTION
P0.0P0.7
Port 0, Bits 0 through 7. Port 0 is a bidirectional I/O port. This port also provides a multiplexed low
order address/data bus during accesses to external memory.
P1.0P1.7
Port 1, Bits 0 through 7. Port 1 is a bidirectional I/O port with internal pull-ups. Pins P1.0 and P1.1
also serve as T2 (Timer 2 external input) and T2EX (Timer 2 capture/reload trigger), respectively.
P2.0P2.7
Port 2, Bits 0 through 7. Port 2 is a bidirectional I/O port with internal pull-ups. This port also provides
the upper address bits for accesses to external memory.
P3.0P3.7
Port 3, Bits 0 through 7. Port 3 is a bidirectional I/O port with internal pull-ups. All bits have alternate
functions, which are described below:
PIN
P3.0
P3.1
P3.2
P3.3
P3.4
P3.5
P3.6
P3.7
ALTERNATE FUNCTION
RXD Serial Receive Data
TXD Serial Transmit Data
INT0 External Interrupt 0
INT1 External Interrupt 1
T0 Timer 0 Input
T1 Timer 1 Input
WR Data Write Strobe
RD Data Read Strobe
P4.0P4.3
Another bit-addressable bidirectional I/O port P4. P4.3 and P4.2 are alternative function pins. It can be
used as general I/O pins or external interrupt input sources ( INT2 / INT3 ).
EA
External Address Input, active low. This pin forces the processor to execute out of external ROM. This
pin should be kept low for all W78C31 operations.
RST
Reset Input, active high. This pin resets the processor. It must be kept high for at least two machine
cycles in order to be recognized by the processor.
ALE
Address Latch Enable Output, active high. ALE is used to enable the address latch that separates the
address from the data on Port 0. ALE runs at 1/6th of the oscillator frequency. A single ALE pulse is
skipped during external data memory accesses. ALE goes to a high impedance state during reset with
a weak pull-up.
-4-

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W78C052D 전자부품, 판매, 대치품
W78C52D/W78C052D
New Defined Peripheral
In order to be more suitable for I/O, an extra 4-bit bit-addressable port P4 and two external interrupts
INT2 , INT3 have been added to either the PLCC or QFP package. And description follows:
1. INT2 / INT3
Two additional external interrupts, INT2 and INT3 , whose functions are similar to those of external
interrupt 0 and 1 in the standard 80C52. The functions/status of these interrupts are
determined/shown by the bits in the XICON (External Interrupt Control) register. The XICON register is
bit-addressable but is not a standard register in the standard 80C52. Its address is at 0C0H. To
set/clear bits in the XICON register, one can use the "SETB (/CLR) bit" instruction. For example,
"SETB 0C2H" sets the EX2 bit of XICON.
***XICON - external interrupt control (C0H)
PX3 EX3 IE3
IT3 PX2 EX2 IE2
IT2
PX3:
EX3:
IE3:
IT3:
PX2:
EX2:
IE2:
IT2:
External interrupt 3 priority high if set
External interrupt 3 enable if set
If IT3 = 1, IE3 is set/cleared automatically by hardware when interrupt is detected/serviced
External interrupt 3 is falling-edge/low-level triggered when this bit is set/cleared by software
External interrupt 2 priority high if set
External interrupt 2 enable if set
If IT2 = 1, IE2 is set/cleared automatically by hardware when interrupt is detected/serviced
External interrupt 2 is falling-edge/low-level triggered when this bit is set/cleared by software
Eight-source interrupt informations:
INTERRUPT SOURCE
External Interrupt 0
Timer/Counter 0
External Interrupt 1
Timer/Counter 1
Serial Port
Timer/Counter 2
External Interrupt 2
External Interrupt 3
VECTOR
ADDRESS
03H
0BH
13H
1BH
23H
2BH
33H
3BH
POLLING
SEQUENCE WITHIN
PRIORITY LEVEL
0 (highest)
1
2
3
4
5
6
7 (lowest)
ENABLE
REQUIRED
SETTINGS
IE.0
IE.1
IE.2
IE.3
IE.4
IE.5
XICON.2
XICON.6
INTERRUPT
TYPE
EDGE/LEVEL
TCON.0
-
TCON.2
-
-
-
XICON.0
XICON.3
Publication Release Date: December 4, 2006
- 7 - Revision A5

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W78C052D

8-BIT MICROCONTROLLER

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