PEDL66579-03

1Semiconductor

MSM66579 Family

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SPECIAL FEATURES

1. High-performance CPU

The family includes the high-performance CPU, powerful bit manipulation instruction set, full symmetrical

addressing mode, and ROM WINDOW function, and also provides the best optimized C compiler support.

2. A variety of power saving modes

Attaching a 32.768-kHz crystal produces a real-time clock signal from the internal clock timer. Use of a single

clock in place of dual clocks is possible. Switching the CPU clock to this clock signal, 1/2

× main clock, or 1/4 ×

main clock, then produces operation in a low power consumption mode. The clock gear function allows a 1/2

× or

1/4

× main clock to be selected for the CPU operating clock.

The family provides a wide range of standby control functions. In addition to the usual STOP mode that stops the

oscillator, there are the quick restart STOP mode that shuts down the CPU and peripherals but leaves the oscillator

running, and the HALT mode that shuts down the CPU but leaves the peripherals running.

3. Variety of multifunctional serial ports

The family includes two channels of built-in synchronous serial ports with 32-byte FIFO implementing an auto

transfer function. The family allows multi-byte 1-frame information which consists of address, command, and data

to be easily and efficiently transmitted to or received from a serial interface type peripheral LSI device. The family

also allows multi-byte character information to be easily and efficiently transmitted to or received from an LCD

module. In addition, the family has two channels of combined UART/synchronous serial ports, and provides four

channels of serial interfaces.

4. MSM66Q577L, MSM66Q577 and MSM66Q579L with flash memory programmable with single power

supply

In addition to the regular mask ROM version, the family includes these versions with 128KB of flash memory that

can be programmed using a single power supply. For the MSM66Q577L and MSM66Q579L, an internal booster

circuit derives the necessary program voltage from the device's low (2.7 V min) power supply, and the program

voltage for the MSM66Q577 is provided with a single 5 V power supply.

5. High-precision A/D and D/A converters

The family includes a high-precision 10-bit analog-to-digital converter with eight channels and 8-bit digital-to-

analog converter with two channels.

6. Multifunction PWM

The family supports both 8- and 16-bit PWM operation. Choosing between the time-base counter output or

overflow from an 8-bit auto-reload timer as the PWM counter clock source provides a wide number of possibilities

over a broad frequency range. The 16-bit PWM configuration supports a high-speed synchronization mode that

generates a high-precision output signal with less ripple suitable for digital-to-analog control applications.

UART/synchronous SIO

UART/synchronous SIO

Synchronous SIO with 32-byte FIFO

Synchronous SIO with 32-byte FIFO