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PDF W77L058A Data sheet ( Hoja de datos )
| Número de pieza | W77L058A | |
| Descripción | 8-BIT MICROCONTROLLER | |
| Fabricantes | nuvoton | |
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W77LE58/W77L058A Data Sheet
8-BIT MICROCONTROLLER
Table of Contents-
1. GENERAL DESCRIPTION ................................................................................................................. 2
2. FEATURES......................................................................................................................................... 2
3. PIN CONFIGURATIONS .................................................................................................................... 3
4. PIN DESCRIPTION ............................................................................................................................ 4
5. FUNCTIONAL DESCRIPTION ........................................................................................................... 5
6. MEMORY ORGANIZATION ............................................................................................................... 7
6.1 Instruction ............................................................................................................................... 25
6.2 InstructionTiming..................................................................................................................... 34
6.3 Power Management................................................................................................................ 42
6.4 Reset Conditions .................................................................................................................... 44
6.5 Reset State ............................................................................................................................. 45
7. PROGRAMMABLE TIMERS/COUNTERS ....................................................................................... 49
8. TIMED ACCESS PROTECTION ...................................................................................................... 65
9. ON-CHIP FLASH EPROM CHARACTERISTICS ............................................................................. 67
10. SECURITY BITS............................................................................................................................... 69
11. ELECTRICAL CHARACTERISTICS................................................................................................. 71
11.1 Absolute Maximum Ratings ................................................................................................ 71
11.2 D.C. Characteristics ............................................................................................................ 71
11.3 A.C. Characteristics ............................................................................................................ 72
12. TYPICAL APPLICATION CIRCUITS ................................................................................................ 78
12.1 Expanded External Program Memory and Crystal .............................................................. 78
Expanded External Data Memory and Oscillator.............................................................................. 79
Expanded External Data Memory and Oscillator.............................................................................. 79
13. PACKAGE DIMENSIONS................................................................................................................. 80
13.1 40-pin DIP ........................................................................................................................... 80
13.2 44-pin PLCC........................................................................................................................ 80
13.3 44-pin QFP.......................................................................................................................... 81
14. VERSION HISTORY......................................................................................................................... 82
Publication Release Date: April 17, 2007
- 1 - Revision A7
1 page  
W77LE58/W77L058A
5. FUNCTIONAL DESCRIPTION
The W77L058 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 W77L058 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 W77L058 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 W77L058 to work
efficiently with both fast and slow RAMs and peripheral devices. In addition, the W77L058 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 W77L058 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 W77L058
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 W77L058 can run at a higher speed as compared to
the original 8052, even if the same crystal is used. Since the W77L058 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 W77L058 is responsible for a three-fold increase in
execution speed. The W77L058 has all the standard features of the 8052, and has a few extra
peripherals and features as well.
I/O Ports
The W77L058 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 W77L058 has two enhanced serial ports that are functionally similar to the serial port of the original
8052 family. However the serial ports on the W77L058 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: April 17, 20067
- 5 - Revision A7
5 Page 
W77LE58/W77L058A
Bit: 7
6
SM0D SMOD0
5
-
43210
- GF1 GF0 PD IDL
Mnemonic: PCON
Address: 87h
SMOD : This bit doubles the serial port baud rate in mode 1, 2, and 3 when set to 1.
SMOD0: Framing Error Detection Enable: When SMOD0 is set to 1, then SCON.7(SCON1.7) indicates a
Frame Error and acts as the FE(FE_1) flag. When SMOD0 is 0, then SCON.7(SCON1.7) acts
as per the standard 8052 function.
GF1-0: These two bits are general purpose user flags.
PD: Setting this bit causes the W77L058 to go into the POWER DOWN mode. In this mode all the
clocks are stopped and program execution is frozen.
IDL: Setting this bit causes the W77L058 to go into the IDLE mode. In this mode the clocks to the
CPU are stopped, so program execution is frozen. But the clock to the serial, timer and interrupt
blocks is not stopped, and these blocks continue operating.
Timer Condtrol
Bit: 7 6 5 4 3 2 1 0
TF1 TR1 TF0 TR0 IE1 IT1 IE0 IT0
Mnemonic: TCON
Address: 88h
TF1:
TR1:
TF0:
TR0:
IE1:
IT1:
Timer 1 overflow flag: This bit is set when Timer 1 overflows. It is cleared automatically when the
program does a timer 1 interrupt service routine. Software can also set or clear this bit.
Timer 1 run control: This bit is set or cleared by software to turn timer/counter on or off.
Timer 0 overflow flag: This bit is set when Timer 0 overflows. It is cleared automatically when the
program does a timer 0 interrupt service routine. Software can also set or clear this bit.
Timer 0 run control: This bit is set or cleared by software to turn timer/counter on or off.
Interrupt 1 edge detect: Set by hardware when an edge/level is detected on INT1. This bit is
cleared by hardware when the service routine is vectored to only if the interrupt was edge
triggered. Otherwise it follows the pin.
Interrupt 1 type control: Set/cleared by software to specify falling edge/ low level triggered
external inputs.
IE0: Interrupt 0 edge detect: Set by hardware when an edge/level is detected on INT1. This bit is
cleared by hardware when the service routine is vectored to only if the interrupt was edge
triggered. Otherwise it follows the pin.
IT0: Interrupt 0 type control: Set/cleared by software to specify falling edge/ low level triggered
external inputs.
- 11 -
Publication Release Date: April 17, 20067
Revision A7
11 Page | ||
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