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PDF W79E8213 Data sheet ( Hoja de datos )
| Número de pieza | W79E8213 | |
| Descripción | 8-bit 4T-8051 microcontroller | |
| Fabricantes | Nuvoton | |
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W79E8213/W79E8213R Data Sheet
Table of Contents
1. GENERAL DESCRIPTION ......................................................................................................... 4
2. FEATURES ................................................................................................................................. 5
3. PARTS INFORMATION LIST ..................................................................................................... 6
3.1 Lead Free (RoHS) Parts information list......................................................................... 6
4. PIN CONFIGURATION ............................................................................................................... 6
5. PIN DESCRIPTIONS .................................................................................................................. 7
6. FUNCTIONAL DESCRIPTION.................................................................................................... 8
6.1 On-Chip Flash EPROM .................................................................................................. 8
6.2 I/O Ports.......................................................................................................................... 8
6.3 Timers ............................................................................................................................. 8
6.4 Interrupts......................................................................................................................... 8
6.5 Data Pointer .................................................................................................................... 8
6.6 Architecture..................................................................................................................... 8
6.6.1 ALU ..................................................................................................................................8
6.6.2 Accumulator .....................................................................................................................9
6.6.3 B Register.........................................................................................................................9
6.6.4 Program Status Word .......................................................................................................9
6.6.5 Scratch-pad RAM .............................................................................................................9
6.6.6 Stack Pointer ....................................................................................................................9
6.7 Power Management........................................................................................................ 9
7. MEMORY ORGANIZATION...................................................................................................... 10
7.1 Program Memory (on-chip Flash) ................................................................................. 10
7.2 Data Flash Memory ...................................................................................................... 10
7.3 Data Memory (accessed by MOVX) ............................................................................. 11
7.4 Scratch-pad RAM and Register Map ............................................................................ 11
7.4.1 Working Registers ..........................................................................................................12
7.4.2 Bit addressable Locations ..............................................................................................13
7.4.3 Stack ..............................................................................................................................13
8. SPECIAL FUNCTION REGISTERS ......................................................................................... 14
9. INSTRUCTION SET.................................................................................................................. 40
9.1 Instruction Timing ......................................................................................................... 48
10. POWER MANAGEMENT.......................................................................................................... 51
10.1 Idle Mode ...................................................................................................................... 51
10.2 Power-down Mode ........................................................................................................ 51
11. RESET CONDITIONS............................................................................................................... 52
11.1 Sources of reset............................................................................................................ 52
11.1.1 External Reset..............................................................................................................53
11.1.2 Power-On Reset (POR)................................................................................................53
11.1.3 Watchdog Timer Reset.................................................................................................54
11.2 Reset State ................................................................................................................... 54
12. INTERRUPTS ........................................................................................................................... 55
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1 page  
W79E8213/W79E8213R Data Sheet
2. FEATURES
Fully static design 8-bit 4T-8051 CMOS microcontroller:
VDD = 4.5V to 5.5V @20MHz
VDD = 2.7V to 5.5V @12MHz
VDD = 2.4V to 5.5V @4MHz
Instruction-set compatible with MSC-51.
Flexible CPU clock source configurable by config bit and software:
High speed external oscillator: upto 20MHz Crystal and resonator (enabled by config bit).
Internal RC oscillator: 20/10MHz selectable by config bit, only W79E8213R supports ±2%
accuracy internal RC oscillator at fixed voltage and temperature condition.
4K bytes of AP Flash EPROM, with ICP and external writer programmable mode.
128 bytes of on-chip RAM.
W79E8213 series supports 128 bytes NVM Data Flash EPROM for customer data storage used
and 10K writer cycles.
8 pages. Page size is 16 bytes.
Two 16-bit timer/counters.
Ten interrupts source with four levels of priority.
Three-edge detect interrupt inputs.
Programmable Watchdog Timer.
Four-channel 10-bit PWM (Pulse Width Modulator).
Internal square wave generator for buzzer.
Up to 18 I/O pins.
The 4 outputs mode and TTL/Schmitt trigger selectable Port.
LED drive capability on all port pins. Sink 20mA; Drive: -15~-20mA @push-pull mode.
Eight high sink capability (40mA) port pins.
Eight-channel multiplexed with 10-bits A/D convert.
Low Voltage Detect interrupt and reset.
Development Tools:
ICP(In Circuit Programming) writer
Packages:
- Lead Free (RoHS) DIP 20:
W79E8213AKG
- Lead Free (RoHS) SOP 20:
W79E8213ASG
- Lead Free (RoHS) DIP 20:
W79E8213RAKG
- Lead Free (RoHS) SOP 20:
W79E8213RASG
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5 Page 
W79E8213/W79E8213R Data Sheet
7.3 Data Memory (accessed by MOVX)
Not available in this product series.
7.4 Scratch-pad RAM and Register Map
As mentioned before the W79E8213 series have separate Program and Data Memory areas. The on-
chip 128 bytes scratch pad RAM is in addition to the external memory. There are also several Special
Function Registers (SFRs) which can be accessed by software. The SFRs can be accessed only by
direct addressing, while the on-chip RAM can be accessed by either direct or indirect addressing.
FFH
Unused
Indirect
RAM
80H
7FH Direct
&
Indirect
RAM
00H Addressing
SFR
Direct
Addressing
Only
Figure 7-2: W79E8213 RAM and SFR memory map
Since the scratch-pad RAM is only 128 bytes it can be used only when data contents are small. There
are several other special purpose areas within the scratch-pad RAM. These are described as
following.
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11 Page | ||
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