AN2836 Freescale Semiconductor / Motorola, AN2836 Datasheet - Page 5

• Manufacturer Part Number: AN2836
• Description: Web Server Development with MC9S12NE64 and OpenTCP
• Manufacturer: Freescale Semiconductor / Motorola

MC9S12NE64 MCU with Integrated Ethernet Controller
MC9S12NE64 MCU with Integrated Ethernet Controller
This section introduces the MC9S12NE64 MCU and provides a brief overview of the MC9S12NE64
Ethernet controller.
MC9S12NE64
The MC9S12NE64 is a 16-bit MCU based on Freescale Semiconductor’s HCS12 CPU platform. It
includes 8K of RAM and 64K of FLASH. The MC9S12NE64 has other standard on-chip peripherals
including two asynchronous serial communications interface modules (SCIs), a serial peripheral interface
(SPI), an inter-integrated circuit bus (IIC), a 4-channel/16-bit timer module (TIM), an 8-channel/10-bit
analog-to-digital converter (ATD), and up to 18 pins available as keypad wake-up inputs (KWUs). In
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addition, an expanded bus that can be operated at 16 MHz
is available.
Integrated Ethernet Controller
The MC9S12NE64 introduces a new peripheral for the HCS12 CPU platform, the integrated Ethernet
controller. The MC9S12NE64 integrates an Ethernet controller that includes a media access controller
(MAC) and a physical transceiver (PHY) in one die with the CPU, memory, and other HCS12 standard
on-chip peripherals. The MC9S12NE64 integrated Ethernet controller is compatible with IEEE 802.3 and
802.3u specifications for 10-Mbps or 100-Mbps operation, respectively.
The MC9S12NE64 can be targeted at low-throughput connectivity applications that operation at 3.3-V
(±5%) external supply range. With an on-chip bandgap-based voltage regulator (VREG), the internal
digital supply voltage of 2.5 V (V
) can also be generated.
DD
A block diagram of the MC9S12NE64 is provided in
Figure
4. More information on the MC9S12NE64 is
available from the Freescale website: http://freescale.com/semiconductors.
1. At a 16-MHz internal bus speed, the MC9S12NE64 integrated Ethernet controller is limited to 10-Mbps operation. A 25-MHz
internal bus speed is required for 100-Mbps operation. Expanded bus is available only in the 112-pin LQFP package.
Web Server Development with MC9S12NE64 and OpenTCP, Rev. 0
Freescale Semiconductor
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