AN2692 Freescale Semiconductor / Motorola, AN2692 Datasheet - Page 5

• Manufacturer Part Number: AN2692
• Description: MC9S12NE64 Integrated Ethernet Controller
• Manufacturer: Freescale Semiconductor / Motorola

MC9S12NE64 Integrated Ethernet Controller
MC9S12NE64 Integrated Ethernet Controller
This section will introduce the MC9S12NE64 and provide an overview of the MC9S12NE64 integrated
Ethernet controller. The discussion will also include a summary of the minimum number of printed circuit
board (PCB) components required in an MC9S12NE64 system to enable its Ethernet capability.
MC9S12NE64
The MC9S12NE64 includes 8K of RAM and 64K of FLASH. It also has other standard on-chip peripherals,
including two asynchronous serial communications interface modules (SCIs), a serial peripheral interface
(SPI), an inter-integrated circuit module (IIC), a 4-channel/16-bit timer module (TIM), an 8-channel/10-bit
analog-to-digital converter (ATD), and pins available as keypad wake-up inputs (KWUs). In addition, in
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the 112-pin package, an expanded bus that is specified for operation at 16 MHz
is available.
Integrated Ethernet Controller
The MC9S12NE64 introduces a new peripheral for the HCS12 CPU platform, an integrated Ethernet
controller. The MC9S12NE64 integrates an Ethernet controller that includes a MAC and PHY in one die
with the CPU, memory, and other HCS12 standard on-chip peripherals.
The MC9S12NE64 can be targeted at low-throughput connectivity applications that use a 3.3-V external
power supply. With an on-chip bandgap-based voltage regulator (VREG), an 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 Semiconductor website: http://freescale.com.
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.
MC9S12NE64 Integrated Ethernet Controller, Rev. 0.2
Freescale Semiconductor
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