PD63000

· IEEE 802.3af-2003 standard, DTE Power via MDI 
· PowerDsine PD64012 Data Sheet, Cat. No. 06-0003-058 
· Serial Communication Protocol, Cat. No. 06-0032-056 
· PowerDsine Application Note 129 for Designing a  48-port Enhanced PoE System 
· MC9S08GB/GT Data sheet (V1.5) 8-/16-Bit Products Division, Motorola, Inc.

PowerDsine's^(TM) Microcontroller Unit, PD63000, is a member of Motorola's HCS08 Family of 8-bit microcontroller units (MCUs). This MCU uses the enhanced HCS08 core and is pre-programmed with a special proprietary application. It is used in conjunction with PowerDsine's PD63000 PoE Manager in Ethernet switches and Midspans to allow next generation network devices to share power and data over the same cable, according to IEEE 802.3af.

When used  in conjunction with the  PD63000, the PD64012 operates in Enhanced mode. 
 
The PD63000 features a 1 Mb/s SPI to each of the PoE Managers and a  communication interface with the host CPU via UART or I²C protocol. The I/O lines, the SPI bus and the control signals are loaded by 50- ohm serial resistors. The PD63000 runs at about 10 MHz, providing a 1 MHz clock frequency to the SPI bus. An external resonator is used for clock generation.
 
The PD63000 is a Motorola's MC9S08GB60CFU microprocessor control unit   this is an 8-bit device composed of standard on-chip peripherals including: an 8-bit CPU, a 60-kbyte flash EEPROM, a 4-kbyte RAM,  an asynchronous serial communications interface, a serial peripheral interface, a 3-channel timer and a 5-channel timer. In addition this chip includes: an 10-bit analog-to-digital converter.