PCI-PWM02 Users Manual (Rev 1.4)
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http://www.daqsystem.com
1. PCI-PWM02 Block Diagram
In the case of PCI-PWM02, as shown in [Figure 1-1], four digital PWM (Pulse Width Modulation)
control blocks are configured to interface with the outside.
PWM is widely used to control the speed control of DC motor and adjust the light quantity of lighting
products such as LED by controlling the average voltage by changing the duty ratio within a certain
period.
PCI Target
PCI BUS
Local Bus
Address
Data(Mem,I/O)
PWM0
External
Interface
IO Decoder
To each IO
Module
PCI-PWM02 INTERNAL BLOCK
MEM Decoder
BUS Mux
PWM1
PWM2
PWM3
Digital I/O
[Figure 1-1. PCI-PWM02 Internal block diagram]
The PCI-PWM02 is a board having the functions of external interface with the 4 PWM Control
Blocks like a Figure 1-1.
GENERAL DESCRIPTION
PCI 32-Bit, 33MHz 5/3.3V Compatible Target Board
6-Bit Digital Input
12-Bit Digital Output
4 Port Triggered PWM
3.3V COMOS or TTL Logic Input, 3.3V CMOS Logic Output Level