ML66525 Family User’s Manual
Chapter 1
Overview
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1.
Overview
1.1
Overview
The ML66525 family devices are high-performance 16-bit CMOS microcontrollers that utilize
the nX-8/500S, Oki’s proprietary CPU core.
Data from a personal computer with a USB connector can be automatically, quickly written or
read to and from NAND type Flash Memory via USB I/F and NAND Flash Memory I/F.
The ML66525 family devices support clock gear functions, a sub-clock and HALT/STOP
mode, which are suitable for low power applications.
The ML66525 family devices are provided with interfaces to external devices such as a
4-channel multi-functional serial interface with internal 32-byte FIFO and a high-speed bus
interface that has separate address and data buses and does not require external address latches.
A wide variety of internal multi-functional timers enable various timing controls such as
periodic and timed measurements.
With a 16-bit CPU core that enables high-speed arithmetic computations and a variety of bit
processing functions, these general-purpose microcontrollers are optimally suited for Digital
Audio devices such as MP3 players, voice recorders, handy games, and PC peripheral control
systems (to control devices that can be connected to USB and store data into memory).
The ML66525 family devices also include the flash ROM version device (ML66Q525B) that is
programmable with a single 3 V power supply (2.4 to 3.6 V).
[Note]
The ML66525A and ML66Q525A are supplied as stock lasts.
1.2
Features
The ML66525 family has the following features.
●
Instruction set with a wide variety of instructions
Dual instruction set
8- and 16-bit arithmetic instructions
Multiply and divide instructions (High speed multiplier is not provided)
Bit manipulate instructions
Bit logical instructions
ROM table reference instructions
●
Variety of addressing modes
Register addressing
Page addressing
Pointing register indirect addressing
Stack addressing
Immediate addressing
●
Minimum instruction cycles
83 ns at 24 MHz (2.4 to 3.6 V)
61 s at 32.768 kHz (2.4 to 3.6 V)