w681308 Winbond Electronics Corp America, w681308 Datasheet - Page 21

• Manufacturer Part Number: w681308
• Description: Usb Audio Controller
• Manufacturer: Winbond Electronics Corp America

8.
8.1
8.2
8.2.1
On-chip 8k OTP Memory:
All instructions are fetched for execution from this memory area. The MOVC instruction can also access this memory region.
8.2.2
The MCU can access 1K bytes of external Data Memory. This memory region is accessed by the MOVX instruction.
Additionally it has 256 bytes on chip RAM which can be accessed either by direct addressing or by indirect addressing.
Some Special Function Registers (SFRs) can only be accessed by direct addressing.
8-bit Turbo 8051 Microcontroller with 12/24/48 MHz speed
256 bytes of on chip internal data RAM and 1K bytes external data RAM
Instruction set compatible with Nuvoton Turbo 8051
Three 8-bit I/O ports
Three 16-bit timers
One Full-duplex serial port
On-Chip debugger via JTAG (Joint Test Access Group) port
7 interrupt sources with two level priorities
Programmable Watchdog Timer
Two 16-bit data pointers
On Chip 8 KB OTP (One time programmable) memory
Microcontroller
Features
Memory Organization
Program Memory
Data Memory
F F
7 F
0 0
8 0
Direct&Indirect
Indirect RAM
Addressing
Addressing
Addressing only
SFRs Direct
XXXX PRODUCT DESCRIPTION
3 0 0 0
33 F F
21
1K Byte
RAM
1 F F F
0 0 0 0
OPT Internal
8K Byte
ROM
W681308
Rev1.2