|
|
PDF W79L549 Data sheet ( Hoja de datos )
| Número de pieza | W79L549 | |
| Descripción | 8-BIT MICROCONTROLLER | |
| Fabricantes | Winbond | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de W79L549 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
|
No Preview Available !
www.DataSheet4U.com
W79E549/W79L549 Data Sheet
8-BIT MICROCONTROLLER
Table of Contents-
1. GENERAL DESCRIPTION ......................................................................................................... 3
2. FEATURES ................................................................................................................................. 3
3. PIN CONFIGURATIONS ............................................................................................................ 4
4. PIN DESCRIPTION..................................................................................................................... 5
5. BLOCK DIAGRAM ...................................................................................................................... 7
6. FUNCTIONAL DESCRIPTION ................................................................................................... 8
7. MEMORY ORGANIZATION ..................................................................................................... 10
8. INSTRUCTION.......................................................................................................................... 29
8.1 Instruction Timing ......................................................................................................... 29
8.1.1 External Data Memory Access Timing............................................................................32
9. POWER MANAGEMENT.......................................................................................................... 35
10. INTERRUPTS ........................................................................................................................... 38
11. PROGRAMMABLE TIMERS/COUNTERS ............................................................................... 40
11.1 Timer/Counters 0 & 1.................................................................................................... 40
11.2 Timer/Counter 2............................................................................................................ 43
11.3 Pulse Width Modulated Outputs (PWM)....................................................................... 47
11.4 Watchdog Timer ........................................................................................................... 50
12. SERIAL PORT .......................................................................................................................... 54
12.1 Framing Error Detection ............................................................................................... 59
12.2 Multiprocessor Communications .................................................................................. 59
13. TIMED ACCESS PROTECTION .............................................................................................. 61
14. H/W REBOOT MODE (BOOT FROM 4K BYTES OF LDFLASH) ............................................ 63
15. IN-SYSTEM PROGRAMMING ................................................................................................. 64
15.1 The Loader Program Locates at LDFlash Memory ...................................................... 64
15.2 The Loader Program Locates at APFlash Memory ...................................................... 64
16. H/W WRITER MODE ................................................................................................................ 65
17. SECURITY BITS ....................................................................................................................... 66
18. ELECTRICAL CHARACTERISTICS......................................................................................... 67
18.1 Absolute Maximum Ratings .......................................................................................... 67
18.2 DC Characteristics........................................................................................................ 67
18.3 A.C. Characteristics ...................................................................................................... 69
Publication Release Date: December 11, 2005
- 1 - Revision A1
1 page  
W79E549/W79L549
4. PIN DESCRIPTION
SYMBOL
EA
TYPE
DESCRIPTIONS
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
I 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
PROGRAM STORE ENABLE: PSEN enables the external ROM data onto the
O 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.
PORT 0: Port 0 is an open-drain bi-directional I/O port. This port also provides a
P0.0 − P0.7 I/O multiplexed low order address/data bus during accesses to external memory.
Port 0 has internal pull-up resisters enabled by software.
PORT 1: Port 1 is a bi-directional I/O port with internal pull-ups. The bits have
alternate functions which are described below:
P1.0 − P1.7 I/O T2(P1.0): Timer/Counter 2 external count input
T2EX(P1.1): Timer/Counter 2 Reload/Capture/Direction control
P2.0 − P2.7
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.
Publication Release Date: December 11, 2005
- 5 - Revision A1
5 Page 
W79E549/W79L549
Special Function Registers
The W79E(L)549 uses Special Function Registers (SFRs) to control and monitor peripherals and their
Modes.
The SFRs reside in the register locations 80-FFh and are accessed by direct addressing only. Some
of the SFRs are bit addressable. This is very useful in cases where one wishes to modify a particular
bit without changing the others. The SFRs that are bit addressable are those whose addresses end in
0 or 8. The W79E(L)549 contains all the SFRs present in the standard 8052. However, some
additional SFRs have been added. In some cases unused bits in the original 8052 have been given
new functions. The list of SFRs is as follows. The table is condensed with eight locations per row.
Empty locations indicate that there are no registers at these addresses. When a bit or register is not
implemented, it will read high.
Table 1. Special Function Register Location Table
F8 EIP
F0 B
E8 EIE
E0 ACC
D8 WDCON
D0 PSW
C8 T2CON
C0
B8 IP
B0 P3
A8 IE
A0 P2
98 SCON0
90 P1
88 TCON
80 P0
PWMP
PWM0
PWM1
PWMCON1 PWM2
T2MOD
SADEN
P5
SADDR
XRAMAH
SBUF
TMOD
SP
RCAP2L
P6
P4CSIN
P42AL
P4CONA
TL0
DPL
RCAP2H
PWM5
P7
P42AH
P4CONB
TL1
DPH
TL2
PMR
SFRAL
P43AL
P40AL
TH0
TH2
STATUS
SFRAH
P4
P43AH
P40AH
TH1
Note: The SFRs in the column with dark borders are bit-addressable.
PWM3
PWMCON2 PWM4
TA
SFDFD
SFRCN
P41AL
CKCON
CHPCON
P41AH
PCON
- 11 -
Publication Release Date: December 11, 2005
Revision A1
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet W79L549.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| W79L549 | 8-BIT MICROCONTROLLER | Winbond |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |