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W79E4051 Schematic ( PDF Datasheet ) - NuvoTon

Teilenummer W79E4051
Beschreibung (W79E2051 / W79E4051) 8-Bit Microcontroller
Hersteller NuvoTon
Logo NuvoTon Logo 




Gesamt 70 Seiten
W79E4051 Datasheet, Funktion
Preliminary W79E4051/W79E2051 Data Sheet
8-BIT MICROCONTROLLER
Table of Contents-
1 GENERAL DESCRIPTION ......................................................................................................... 4
2 FEATURES ................................................................................................................................. 5
3 PARTS INFORMATION LIST ..................................................................................................... 7
3.1 Lead Free (RoHS) Parts information list......................................................................... 7
4 PIN CONFIGURATION ............................................................................................................... 8
5 PIN DESCRIPTION..................................................................................................................... 9
6 FUNCTIONAL DESCRIPTION.................................................................................................. 10
6.1 On-Chip Flash EPROM ................................................................................................ 10
6.2 I/O Ports........................................................................................................................ 10
6.3 Serial I/O ....................................................................................................................... 10
6.4 Timers ........................................................................................................................... 10
6.5 Interrupts....................................................................................................................... 10
6.6 Data Pointers ................................................................................................................ 10
6.7 Architecture................................................................................................................... 11
6.7.1 ALU ................................................................................................................................11
6.7.2 Accumulator ...................................................................................................................11
6.7.3 B Register.......................................................................................................................11
6.7.4 Program Status Word: ....................................................................................................11
6.7.5 Scratch-pad RAM ...........................................................................................................11
6.7.6 Stack Pointer ..................................................................................................................11
7 MEMORY ORGANIZATION...................................................................................................... 12
7.1 Program Memory (on-chip Flash) ................................................................................. 12
7.2 Data Flash Memory ...................................................................................................... 12
7.3 Scratch-pad RAM and Register Map ............................................................................ 12
7.4 Working Registers......................................................................................................... 14
7.5 Bit addressable Locations............................................................................................. 14
7.6 Stack ............................................................................................................................. 15
8 SPECIAL FUNCTION REGISTERS ......................................................................................... 16
9 INSTRUCTION.......................................................................................................................... 37
9.1 Instruction Timing.......................................................................................................... 45
10 POWER MANAGEMENT.......................................................................................................... 46
10.1 Idle Mode ...................................................................................................................... 46
10.2 Power Down Mode ....................................................................................................... 46
11 RESET CONDITIONS............................................................................................................... 48
11.1 Sources of reset............................................................................................................ 48
11.1.1 External Reset ..............................................................................................................48
11.1.2 Power-On Reset (POR)................................................................................................48
11.1.3 Brown-Out Reset (BOR)...............................................................................................48
Publication Release Date: April 16, 2009
- 1 - Revision A06
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W79E4051 Datasheet, Funktion
Preliminary W79E4051/W79E2051 Data Sheet
- Lead Free (RoHS) PDIP 20:
- Lead Free (RoHS) SOP 20:
- Lead Free (RoHS) SSOP 20:
W79E2051RAKG
W79E2051RASG
W79E2051RARG
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W79E4051 pdf, datenblatt
Preliminary W79E4051/W79E2051 Data Sheet
7 MEMORY ORGANIZATION
The W79E4051/2051 series separate the memory into two separate sections, the Program Memory
and the Data Memory. The Program Memory is used to store the instruction op-codes, while the Data
Memory is used to store data or for memory mapped devices.
7.1 Program Memory (on-chip Flash)
The Program Memory on the W79E4051/2051 series can be up to 4K/2K bytes long. All instructions
are fetched for execution from this memory area. The MOVC instruction can also access this memory
region.
7.2 Data Flash Memory
The Data Flash EPROM on the W79E4051/2051 series is 128 bytes long with page size of 16 bytes.
The W79E4051/2051 series read the content of data memory by using “MOVC A, @A+DPTR”. To
write data is by NVMADDRL, NVMDATA and NVMCON SFR’s registers.
FFFFh
Unused
Code Memory
FC7Fh
FC00h
128 Bytes
NVM
Data Memory
Unused
Code Memory
0FFFh/07FFh
128 bytes NVM
16 bytes/page
Page 7
Page 6
Page 5
Page 4
Page 3
Page 2
Page 1
Page 0
FC7Fh
FC70h
FC6Fh
FC60h
FC5Fh
FC50h
FC4Fh
FC40h
FC3Fh
FC30h
FC2Fh
FC20h
FC1Fh
FC10h
FC0Fh
FC00h
NVM Data Memory Area
4K/2K Bytes
On-Chip
Code Memory
CONFIG1
CONFIG0
0000h
W79E4051/2051 On-chip Flash Memory Space
Table 7-1 W79E4051/2051 On-chip Flash Memory Map
7.3 Scratch-pad RAM and Register Map
- 12 -
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