Freescale has added 30 highly integrated microcontrollers (MCUs) to its expanding 8-bit S08 portfolio for consumer, industrial and automotive applications. These latest MCUs provide embedded designers with a wider choice of 8-bit options supporting 5 V operation, advanced motor control and an extended range of peripherals, from USB to LIN, to meet their application needs.
S08JM60 family: The 8-bit USB MCU solution
The MC9S08JM60 devices add higher performance and integration to Freescale's 8-bit embedded USB portfolio. The eight devices in this growing family feature a full-speed USB device controller, which enables customers to upgrade and standardise serial communications quickly. This family offers a 24 MHz bus frequency along with up to 60 KB of flash memory and a 12-channel, 12-bit analog-to-digital converter (ADC). The devices also include an integrated USB transceiver.
The S08JM60 family includes several system protection features, such as low-voltage detection and a computer operating properly (COP) module. These features make the USB devices suitable for low-end industrial control applications that require high reliability and connectivity, such as PC peripherals, building and lighting control systems, testing and measurement equipment, and medical monitoring devices.
Freescale also offers extensive USB application notes and a complimentary 'USB-Lite' software stack by CMX. Source code for the USB stack is also available, enabling developers to modify the software for their application needs.
S08SH family: Bringing 5 V operation to the low end of 8-bit
Featuring 12 devices, the MC9S08SH8/4 family brings increased flexibility and a wide breadth of package offerings to Freescale's 5 V low-end 8-bit MCU portfolio. These highly integrated controllers are low-pin-count S08 devices with a 20 MHz internal clock source (ICS). They also include a useful ganged output capability that enables developers to achieve higher current drive by toggling multiple pins using one bit. Rounding out the family's highly integrated functionality are robust analog capabilities, a comprehensive set of serial modules, an on-chip temperature sensor and robust memory options, which are ideal for general-purpose, tethered consumer and industrial applications in the 2,7 V to 5,5 V range.
S08SG family: Entry-level S08 for automotive
The S08SG family includes four 8-bit MCUs designed for local interconnect network (LIN) slave, general market and space-constrained automotive applications. The core operates at up to 40 MHz, stretching the boundaries of 8-bit performance into the range of 16-bit MCUs. This family offers on-chip emulation/debug that helps reduce development time by enabling developers to make software changes in realtime.
The family's high level of on-chip integration helps reduce development cost, saves board space and enhances system-level quality by eliminating the need for peripheral board components, such as external clock sources. Other notable features include low voltage inhibit (LVI) circuits, voltage regulators, I/O multiplexers, watchdog circuits and ADCs.
S08AC16 family: Peripherals optimised for motor control
The MC9S08AC16 family includes six devices that offer an upward migration path to MC9S08AW-based applications requiring higher performance, enhanced peripherals, additional memory and improved system security. The MC9S08AC16 adds a third timer PWM module (TPM), giving designers added clocking flexibility. Improvements to the serial communications interface (SCI) satisfy the designer's need for integrated LIN functionality. The addition of a 1 kHz oscillator to the COP/watchdog timer provides two additional timeout options, helping to enhance system security.
Additional noteworthy features include enhanced low-voltage warning, two serial communications interfaces (SCIs), a serial peripheral interface (SPI), an inter-integrated circuit (IIC), a 10-bit analog-to-digital converter (ADC), and 10 programmable 16-bit timer channels with centre-aligned pulse-width modulation (PWM) capability. The combination of high performance and on-chip integration makes this family suitable for many general embedded industrial control and consumer appliance applications.
Development support
Freescale's CodeWarrior Development Studio provides an array of built-in features and utilities to help developers speed delivery of higher quality products to market. For example, the Processor Expert rapid application design tool included in the CodeWarrior tool suite helps simplify the migration process between other Freescale MCUs.
To ease board design, Freescale offers full-featured evaluation and cost-effective demonstration kits for the JM, SH, SG and AC families. These kits are designed to help developers quickly learn about the MCUs and jumpstart application development.
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