PixArt Imaging Inc.

PAC107

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6

PixArt Imaging Inc.

V1.4, Aug, 2005

2. Block Diagram

Sensor

(16 kB)

i-ROM

on-chip

ext-SRAM

0~1023

RXD

Addr[15:8]

P2

P0

8

14

addr

i_data

Addr[7:0] or

Data[7:0]

PWM

p3.0

TXD

1

2

3

INT0#

INT1#

T0

4

T1

5

6/7

WE#, RD#

p1.0

1

2

3

4

5

6

-

-

-

PWM

-

ALE

RST

8032 core

*See SFR mapping

T2

RXD_1

TXD_1

Fig 2.1 – Block diagram of PAC107

As the block diagram of PAC107 is shown in Figure 2.1. By pulling the CSB register in SFR(Special

function register) to low, the 164x124 sensor starts to produce a signal according to the amount of the light

integrated in pixels. The integrated analog signal will be readout and amplifier with ADC output in 8-bit. The

output 8 bit digital sensor data then be received by 8051 core by software.

16KB program ROM and 1kB SRAM is provided in PAC107 and two PWM ports are supported.