Oki JOB60851 USB Bits and Pieces, Device Controller Specifications, 1. ML60851C Specifications

Chapter 4 Software Development

4-3. USB Bits and Pieces

4-3-1. Device Controller Specifications

Table 4.3.1 summarizes the ML60851C specifications. For detailed device specifications, see the data sheet (Ml60851c.pdf).

Table 4.3.1. ML60851C Specifications

Data transfer speed	Full speed (12 Mb/s) only
	Data flow type	Endpoint	Direction	Buffer size
	Control	EP0	In	8bytes
Endpoint			Out	8bytes
specifications	Bulk	EP1	In and out	64 bytes × 2
		EP2	In and out	64bytes
	Interrupt	EP3	In	8bytes
	Isochronous	-	-	-
DMA	8/16-bit DMA request function (Endpoint 1: DMA request and acknowledge)
Power supply	Vcc3=3.0 to3.6V, Vcc5=3.0 to 5.5V
	Interface to 5-volt microcontroller with local power supply (Vcc5)
Package	44-pin QFP or TQFP

4-3-2. Overview of ML60851C Operation

Figure 4.3.1 is a block diagram for ML60851C internals. The basic structure and operation are both simple. The receiver digitizes the inputs from the USB differential (D+/D-) data bus for the protocol engine. The phase-locked loop (DPLL) synchronizes the protocol engine with the bus clock.

The protocol engine executes the transactions. It analyzes the time-multiplexed packets over the USB bus looking for transactions including its assigned address. If it finds one, it analyzes the request from the host to the corresponding endpoint and then accesses the appropriate buffer for receiving from or transmitting to the USB bus.

page 4-17