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W77E58P-25 데이터시트 PDF




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부품번호 W77E58P-25 기능
기능 8 BIT MICROCONTROLLER
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W77E58P-25 데이터시트, 핀배열, 회로
Preliminary W77E58
www.DataSheet4U.com
8 BIT MICROCONTROLLER
Table of Contents--
GENERAL DESCRIPTION ..............................................................................................................................2
FEATURES ......................................................................................................................................................2
PIN CONFIGURATION ....................................................................................................................................3
PIN DESCRIPTION..........................................................................................................................................4
BLOCK DIAGRAM ...........................................................................................................................................6
FUNCTIONAL DESCRIPTION ........................................................................................................................7
MEMORY ORGANIZATION.............................................................................................................................8
INSTRUCTION ...........................................................................................................................................29
INSTRUCTION TIMING .............................................................................................................................37
POWER MANAGEMENT ..........................................................................................................................46
RESET CONDITIONS................................................................................................................................48
RESET STATE...........................................................................................................................................49
PROGRAMMABLE TIMERS/COUNTERS ....................................................................................................53
TIMED ACCESS PROTECTION ...................................................................................................................70
ON-CHIP MTP ROM CHARACTERISTICS...................................................................................................71
SECURITY BITS ............................................................................................................................................74
ABSOLUTE MAXIMUM RATINGS ................................................................................................................75
DC ELECTRICAL CHARACTERISTICS ......................................................................................................76
AC ELECTRICAL CHARACTERISTICS........................................................................................................77
TYPICAL APPLICATION CIRCUITS .............................................................................................................82
Expanded External Program Memory and Crystal......................................................................................82
Expanded External Data Memory and Oscillator ........................................................................................83
PACKAGE DIMENSIONS..............................................................................................................................83
40-pin DIP...................................................................................................................................................83
44-pin PLCC ...............................................................................................................................................84
44-pin QFP .................................................................................................................................................84
Publication Release Date: March 1999
- 1 - Revision A1




W77E58P-25 pdf, 반도체, 판매, 대치품
Preliminary W77E58
PIN DESCRIPTION
SYMBOL TYPE
DESCRIPTIONS
EA I EXTERNAL ACCESS ENABLE: This pin forces the processor to execute out of
external ROM. It should be kept high to access internal ROM. The ROM
address and data will not be present on the bus if EA pin is high and the
program counter is within 32 KB area. Otherwise they will be present on the
bus.
PSEN
O PROGRAM STORE ENABLE: PSEN enables the external ROM data onto the
Port 0 address/data bus during fetch and MOVC operations. When internal
ROM access is performed, no PSEN strobe signal outputs from this pin.
ALE O ADDRESS LATCH ENABLE: ALE is used to enable the address latch that
separates the address from the data on Port 0.
RST
I RESET: A high on this pin for two machine cycles while the oscillator is running
resets the device.
XTAL1
I CRYSTAL1: This is the crystal oscillator input. This pin may be driven by an
external clock.
XTAL2
O CRYSTAL2: This is the crystal oscillator output. It is the inversion of XTAL1.
VSS I GROUND: Ground potential
VDD I POWER SUPPLY: Supply voltage for operation.
P0.0P0.7 I/O PORT 0: Port 0 is an open-drain bi-directional I/O port. This port also provides
a multiplexed low order address/data bus during accesses to external memory.
P1.0P1.7 I/O PORT 1: Port 1 is a bi-directional I/O port with internal pull-ups. The bits have
alternate functions which are described below:
T2(P1.0): Timer/Counter 2 external count input
T2EX(P1.1): Timer/Counter 2 Reload/Capture/Direction control
RXD1(P1.2): Serial port 2 RXD
TXD1(P1.3): Serial port 2 TXD
INT2(P1.4): External Interrupt 2
INT3 (P1.5): External Interrupt 3
INT4(P1.6): External Interrupt 4
P2.0P2.7
INT5 (P1.7): External Interrupt 5
I/O PORT 2: Port 2 is a bi-directional I/O port with internal pull-ups. This port also
provides the upper address bits for accesses to external memory.
-4-

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W77E58P-25 전자부품, 판매, 대치품
Preliminary W77E58
FUNCTIONAL DESCRIPTION
The W77E58 is 8052 pin compatible and instruction set compatible. It includes the resources of the
standard 8052 such as four 8-bit I/O Ports, three 16-bit timer/counters, full duplex serial port and
interrupt sources.
The W77E58 features a faster running and better performance 8-bit CPU with a redesigned core
processor without wasted clock and memory cycles. it improves the performance not just by running
at high frequency but also by reducing the machine cycle duration from the standard 8052 period of
twelve clocks to four clock cycles for the majority of instructions. This improves performance by an
average of 1.5 to 3 times. The W77E58 also provides dual Data Pointers (DPTRs) to speed up block
data memory transfers. It can also adjust the duration of the MOVX instruction (access to off-chip
data memory) between two machine cycles and nine machine cycles. This flexibility allows the
W77E58 to work efficiently with both fast and slow RAMs and peripheral devices. In addition, the
W77E58 contains on-chip 1KB MOVX SRAM, the address of which is between 0000H and 03FFH. It
only can be accessed by MOVX instruction; this on-chip SRAM is optional under software control.
The W77E58 is an 8052 compatible device that gives the user the features of the original 8052
device, but with improved speed and power consumption characteristics. It has the same instruction
set as the 8051 family, with one addition: DEC DPTR (op-code A5H, the DPTR is decreased by 1).
While the original 8051 family was designed to operate at 12 clock periods per machine cycle, the
W77E58 operates at a much reduced clock rate of only 4 clock periods per machine cycle. This
naturally speeds up the execution of instructions. Consequently, the W77E58 can run at a higher
speed as compared to the original 8052, even if the same crystal is used. Since the W77E58 is a fully
static CMOS design, it can also be operated at a lower crystal clock, giving the same throughput in
terms of instruction execution, yet reducing the power consumption.
The 4 clocks per machine cycle feature in the W77E58 is responsible for a three-fold increase in
execution speed. The W77E58 has all the standard features of the 8052, and has a few extra
peripherals and features as well.
I/O Ports:
The W77E58 has four 8-bit ports and one extra 4-bit port. Port 0 can be used as an Address/Data bus
when external program is running or external memory/device is accessed by MOVC or MOVX
instruction. In these cases, it has strong pull-ups and pull-downs, and does not need any external pull-
ups. Otherwise it can be used as a general I/O port with open-drain circuit. Port 2 is used chiefly as
the upper 8-bits of the Address bus when port 0 is used as an address/data bus. It also has strong
pull-ups and pull-downs when it serves as an address bus. Port 1 and 3 act as I/O ports with alternate
functions. Port 4 is only available on 44-pin PLCC/QFP package type. It serves as a general purpose
I/O port as Port 1 and Port 3. The P4.0 has an alternate function WAIT which is the wait state control
signal. When wait state control signal is enabled, P4.0 is input only.
Serial I/O:
The W77E58 has two enhanced serial ports that are functionally similar to the serial port of the
original 8052 family. However the serial ports on the W77E58 can operate in different modes in order
to obtain timing similarity as well. Note that the serial port 0 can use Timer 1 or 2 as baud rate
generator, but the serial port 1 can only use Timer 1 as baud rate generator. The serial ports
have the enhanced features of Automatic Address recognition and Frame Error detection.
Publication Release Date: March 1999
- 7 - Revision A1

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W77E58P-25

8 BIT MICROCONTROLLER

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