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PDF W79E648 Data sheet ( Hoja de datos )

Número de pieza W79E648
Descripción 8-BIT MICROCONTROLLER
Fabricantes Winbond　
Logotipo Winbond Logotipo



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Preliminary W79E648 Data Sheet
8-BIT MICROCONTROLLER
Table of Contents-
1. GENERAL DESCRIPTION .................................................................................................................... 2
2. FEATURES............................................................................................................................................ 2
3. PIN CONFIGURATION.......................................................................................................................... 3
4. PIN DESCRIPTION ............................................................................................................................... 4
5. BLOCK DIAGRAM ................................................................................................................................. 6
6. FUNCTIONAL DESCRIPTION .............................................................................................................. 7
7. MEMORY ORGANIZATION .................................................................................................................. 8
8. INSTRUCTION .................................................................................................................................... 28
8.1 Instruction Timing .......................................................................................................... 28
9. POWER MANAGEMENT..................................................................................................................... 34
10. INTERRUPTS...................................................................................................................................... 37
11. PROGRAMMABLE TIMERS/COUNTERS .......................................................................................... 39
11.1 Timer/Counters 0 & 1..................................................................................................... 39
11.2 Timer/Counter 2 ............................................................................................................. 42
11.3 Watchdog Timer ............................................................................................................ 45
12. SERIAL PORT ..................................................................................................................................... 52
12.1 Framing Error Detection ................................................................................................ 58
12.2 Multiprocessor Communications ................................................................................... 58
13. TIMED ACCESS PROTECTION ......................................................................................................... 59
14. H/W REBOOT MODE (BOOT FROM 4K BYTES OF LDFLASH) ....................................................... 61
15. IN-SYSTEM PROGRAMMING ............................................................................................................ 62
15.1 The Loader Program Locates at LDFlash Memory ....................................................... 62
15.2 The Loader Program Locates at APFlash Memory ....................................................... 62
16. H/W WRITER MODE........................................................................................................................... 62
17. SECURITY BITS.................................................................................................................................. 63
18. ELECTRICAL CHARACTERISTICS.................................................................................................... 65
18.1 Absolute Maximum Ratings ........................................................................................... 65
18.2 DC Characteristics......................................................................................................... 66
18.3 AC Characteristics ......................................................................................................... 67
19. TYPICAL APPLICATION CIRCUITS ................................................................................................... 72
20. PACKAGE DIMENSIONS.................................................................................................................... 73
21. APPLICATION NOTE .......................................................................................................................... 75
22. REVISION HISTORY........................................................................................................................... 80
Publication Release Date: 05/31/2004
- 1 - Revision A1

1 page




W79E648 pdf
Preliminary W79E648
Pin Description, continued
SYMBOL
TYPE
DESCRIPTIONS
PORT 3: Port 3 is a bi-directional I/O port with internal pull-ups. All bits have
alternate 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
P3.0 − P3.7 I/O 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: Port 4 is a 4-bit bi-directional I/O port. The P4.3 also provide the
P4.0 − P4.3 I/O
alternate function REBOOT which is H/W reboot from LD flash.
P5.0 – P5.7 I/O PORT 5: Port 5 is a bi-directional I/O port with internal pull-ups.
P6.0 – P6.7 I/O PORT6: Port 6 is a bi-directional I/O port with internal pull-ups.
P7.0 – P7.7 I/O PORT 7: Port 7 is a bi-directional I/O port with internal pull-ups.
* Note: TYPE I : input, O: output, I/O: bi-directional.
Publication Release Date: 05/31/2004
- 5 - Revision A1

5 Page





W79E648 arduino
Preliminary W79E648
A brief description of the SFRs now follows.
Port 0
Bit: 7 6 5 4 3 2 1 0
P0.7 P0.6 P0.5 P0.4 P0.3 P0.2 P0.1 P0.0
Mnemonic: P0
Address: 80h
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.
Stack Pointer
Bit:
7
SP.7
6
SP.6
5
SP.5
4
SP.4
3
SP.3
2
SP.2
1
SP.1
0
SP.0
Mnemonic: SP
Address: 81h
The Stack Pointer stores the Scratchpad RAM address where the stack begins. In other words, it
always points to the top of the stack.
Data Pointer Low
Bit:
76543210
DPL.7 DPL.6 DPL.5 DPL.4 DPL.3 DPL.2 DPL.1 DPL.0
Mnemonic: DPL
This is the low byte of the standard 8052 16-bit data pointer.
Address: 82h
Data Pointer High
Bit: 7
DPH.7
Mnemonic: DPH
6
DPH.6
5
DPH.5
4
DPH.4
321
DPH.3 DPH.2 DPH.1
Address: 83h
0
DPH.0
This is the high byte of the standard 8052 16-bit data pointer.
Power Control
Bit:
76
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 indicates a Frame
Error and acts as the FE flag. When SMOD0 is 0, then SCON.7 acts as per the standard
8052 function.
GF1-0: These two bits are general purpose user flags.
- 11 -
Publication Release Date: 05/31/2004
Revision A1

11 Page







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