Power and Clocking

Table 8-6. PXA250 and PXA210 VCCN vs. VCCQ (Sheet 3 of 6)

Pin

Pin

Alt_fn

Alt_fn

Alt_fn

Alt_fn

Signal Description and

Power

Count

1-(in)

2-(in)

1-(out)

2-(out)

Comments

Supply

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MMCMD

1

 

 

 

 

MMC Command

VCCQ

 

 

 

 

 

 

 

 

MMDAT

1

 

 

 

 

MMC Data

VCCQ

 

 

 

 

 

 

 

 

AC_RESET_n

1

 

 

 

 

ac97 RESET

VCCQ

 

 

 

 

 

 

 

 

UDC+

1

 

 

 

 

USB client high differential signal

VCCQ

 

 

 

 

 

 

 

 

UDC-

1

 

 

 

 

USB client low differential signal

VCCQ

 

 

 

 

 

 

 

 

SCL

1

 

 

 

 

I2C Clock

VCCQ

 

 

 

 

 

 

 

 

SDA

1

 

 

 

 

I2C Bidirectional Data

VCCQ

 

 

 

 

 

 

 

 

nRESET

1

 

 

 

 

Hardware reset

VCCQ

 

 

 

 

 

 

 

 

nRESET_OUT

1

 

 

 

 

Reset output

VCCQ

 

 

 

 

 

 

 

 

BOOT_SEL[2:0]

3

 

 

 

 

ROM Width Select (16/32)

VCCQ

 

 

 

 

 

 

 

 

PWR_EN

1

 

 

 

 

power enable

VCCQ

 

 

 

 

 

 

 

 

nBATT_FAULT

1

 

 

 

 

Battery Fault

VCCQ

 

 

 

 

 

 

 

 

nVDD_FAULT

1

 

 

 

 

VDD Fault

VCCQ

 

 

 

 

 

 

 

 

nTRST

1

 

 

 

 

JTAG Reset

VCCQ

 

 

 

 

 

 

 

 

TDI

1

 

 

 

 

JTAG Data In

VCCQ

 

 

 

 

 

 

 

 

TDO

1

 

 

 

 

JTAG Data Out

VCCQ

 

 

 

 

 

 

 

 

TMS

1

 

 

 

 

JTAG Mode Select

VCCQ

 

 

 

 

 

 

 

 

TCK

1

 

 

 

 

JTAG Clock

VCCQ

 

 

 

 

 

 

 

 

TESTCLK

1

 

 

 

 

TEST Clock

VCCQ

 

 

 

 

 

 

 

 

TEST

1

 

 

 

 

TEST mode

VCCQ

 

 

 

 

 

 

 

 

GP0

1

 

 

 

 

Reserved for sleep wakeup

VCCQ

 

 

 

 

 

 

 

 

GP1

1

GP_RST

 

 

 

Active low GP_reset

VCCQ

 

 

 

 

 

 

 

 

GP2

1

 

 

 

 

General Purpose I/O pin

VCCQ

 

 

 

 

 

 

 

 

GP3

1

 

 

 

 

General Purpose I/O pin

VCCQ

 

 

 

 

 

 

 

 

GP4

1

 

 

 

 

General Purpose I/O pin

VCCQ

 

 

 

 

 

 

 

 

GP5

1

 

 

 

 

General Purpose I/O pin

VCCQ

 

 

 

 

 

 

 

 

GP6

1

 

 

MMCCLK

 

MMC Clock

VCCQ

 

 

 

 

 

 

 

 

GP7

1

 

 

48 MHz

 

48 mhz clock output

VCCQ

 

 

 

 

 

 

 

 

GP8

1

 

 

MMCCS0

 

MMC Chip Select 0

VCCQ

 

 

 

 

 

 

 

 

GP9

1

 

 

MMCCS1

 

MMC Chip Select 1

VCCQ

 

 

 

 

 

 

 

 

GP10

1

 

 

RTCCLK

 

real time clock (1Hz)

VCCQ

 

 

 

 

 

 

 

 

8-8

PXA250 and PXA210 Applications Processors Design Guide

Page 76
Image 76
Intel manual PXA250 and PXA210 Vccn vs. Vccq Sheet 3

PXA250 and PXA210 specifications

The Intel PXA250 and PXA210 processors, part of the Intel XScale architecture, were introduced in the early 2000s, targeting mobile and embedded applications. They are known for their low power consumption, high performance, and advanced multimedia capabilities, making them suitable for a wide range of devices, including PDAs, smartphones, and other portable computing devices.

The PXA250, which operates at clock speeds ranging from 400 MHz to 624 MHz, features a superscalar architecture that allows it to issue multiple instructions per clock cycle. This enhances the overall performance for demanding applications while maintaining low power usage. It supports a variety of peripheral interfaces, including USB, Ethernet, and various memory types, which contributes to its versatility in different product designs.

One of the key technologies in the PXA250 is the integrated Intel Smart Repeat Technology, which optimizes data processing, thereby reducing the amount of power consumed during operation. This feature is particularly important for battery-powered devices, as it extends the overall battery life, allowing for longer usage times in mobile environments. Additionally, the PXA250 includes a dedicated graphics acceleration unit, which enables enhanced graphics and multimedia performance suited to modern applications at the time.

In contrast, the PXA210 is a more entry-level processor, aimed at cost-sensitive applications. Operating at lower clock speeds, typically around 200 MHz to 400 MHz, it forgoes some of the advanced performance features of the PXA250 while still offering a good balance of performance and power efficiency. The PXA210 is less complex, making it suitable for simpler devices that do not require the extensive capabilities of the PXA250.

Both processors utilize the Intel XScale architecture, which is based on the ARM instruction set. They are built on a 0.13-micron process technology, enabling higher density and lower power consumption compared to their predecessors. With integrated memory controllers and bus interfaces, they facilitate efficient data handling and connectivity options.

In summary, both the Intel PXA250 and PXA210 processors played a crucial role in the evolution of mobile computing by providing powerful processing capabilities with energy efficiency. Their features and technologies enabled device manufacturers to create innovative products that catered to the growing demand for portable devices during that era.