Xilinx XAPP169 manual IDT RC32364 RISController, MP3 NG System Block Diagram

MP3 NG: A Next Generation Consumer Platform

R

					7	Serial Data	SED1743	128
							LCD Column
							Driver
	USBN9602		3
	USB								128 x 128
	Interface	Control			2	Serial Data	SED1758	128	LCD Panel
							LCD Row		&
	8						Driver		4 Wire Touch
									Membrane
RC32364	IRQ			Xilinx
	Addr/Data 32						MAX1108
RISC				Spartan II	3	Serial Data
CPU		Control	21	FPGA			2 Channel
							ADC
					2	Control Port	CS4343	L	To Stereo
	IRMS6100				3	Serial Audio	Audio	R	Headphone
			3				DAC		Jack
	IRDA
	Transceiver				16	Data
					11 Address				CompactFlash
					17 Control				Interface
					11	Control
					9	Control
							8
						MT48LC1M16A1	KM29U64000T
						SDRAM	FLASH

Figure 1: MP3 NG System Block Diagram

IDT RC32364 RISController™

The processor chosen for this design is the IDT RC32364. The features of this device that are leveraged in this application are:

•Paged memory management unit.

•High-performance, 175 dhrystone MIPs at 133 MHz.

•Integer Multiply ACcumulate (MAC) support, 67M MACs/second at 133 MHz.

•Separate, line lockable, instruction (8 KB) and data (2 KB) caches.

•Power saving features including active power management and a power-down operating mode.

•On-chip In Circuit Emulation (ICE) interface to provide access to internal CPU state (registers, cache) and for debug control (breakpoints, single step, insert instructions into pipeline).

Figure 2 shows the block diagram for this device. The complete data sheet for the RC32364 can be found at the following URL:

http://www.idt.com/docs/79RC32364_DS_32100.pdf

The RC32364’s MMU consists of address translation logic and a Translation Lookaside Buffer (TLB) capable of supporting demand paged virtual memory. In addition, it includes several features that are valuable in an embedded application such as variable sized pages and lockable TLB entries. Figure 3 illustrates the virtual to physical address translation performed by the RC32364.

XAPP169 (v1.0) November 24, 1999 www.xilinx.com 3

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