W90220F Winbond Electronics Corp America, W90220F Datasheet - Page 4

• Manufacturer Part Number: W90220F
• Description: Pa-risc Embedded Controller
• Manufacturer: Winbond Electronics Corp America

The above information is the exclusive intellectual property of Winbond Electroncs Corp. and shall not be dsiclosed or distributed or reproduced without permission from
Winbond.
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1. OVERVIEW
The W90220 is a high performance, highly integrated 32-bit processor intended for a wide range of
embedded applications, such as videophone, internet devices, internetworking platform. Fig 1-1 shows a
block diagram of the overall system. The W90220 consists of a 32-bit PA-RISC core, memory controller
and integrated logics for I/O modules
The PA-RISC core is equipped with 4 KBytes of instruction cache memory and 4 KBytes of data cache
memory augmented with a dual-cycle multiply/accumulate module running up to 150 MHz. It allows to
implement integrated DSP functions like software modem for high-performance standard data and fax
protocols. A flexible power management scheme (under software control) and lots of low power circuits
have been used to eliminate the chip's power consumption. The W90220 consume only 375 mA at its
maximum speed (150 MHz) on a full-load system.
The chip provides two 8-bit DMA channels, four 16-bit IDE I/O channels, a PCI bridge supporting up to
four external PCI masters, a IEEE-1284 compliant parallel port interface (PPI), two RS232 type universal
asynchronous serial port (UART), two timer channels, a flexible synchronous interface (SSI) connecting to
an external audio or telephony codec devices, a proprietary serial ICE interface (SP-ICE) for software
development and debugging.
The chip has a high performance memory controller. The types of external memory devices supported
include dynamic random access memory (DRAM), Extended data out dynamic random access memory
(EDO-DRAM), static random access memory (SRAM), Flash memory as well as read-only memory
(ROM).
(14.318 Mhz)
OSC
UART
(x2)
Timer (x2)
PLL
Fig 1-1 : W90220 Internal Block Diagram
PCI Bus
Bridge
32-bit Internal DMA bus
PCI
CPUCLK
DRAM/Flash/
ROM Port
Instr. Cache
Controller
Memory
RAM
6-Stage Integer Pipeline
Internal Bus Interface Unit
Data Cache
16-bit-IO Bus
8-bit-DMA/
RAM
Controller
DMA
32-bit CPU Internal Bus
Branch Table
RAM
Parallel Port
Interface
Power Mang.
Serial ICE
Unit
Unit
Sync. Serial
Port
3
Serial ICE
Bus
W90220F
Version 0.84