VSC060 datasheet(87/166 Pages) MAXIM

87 / 166 page

87 of 166

VSC060

Data Sheet

Revision 4.1

January 2008

3.2.91 72h: Pulse Train Control 10 (PTC10)

This register, along with the PTC11 register, provides a user-programmable LED flashing pulse train. The

user can adjust the pulse duration, the pulse train length, and the on/off time to derive a specific visual

indication. The PTC10 register provides eight of the twelve bits available in the programmable pulse train.

The PTC11 register contains two bits of pulse-width programmability, two bits of pulse train length

programmability, and the remaining four bits of the programmable pulse train.

As an example, the pulse train can be used to develop a visual heartbeat indication by programming the

PTC10 register with a 45h and the PTC11 register with a C1h. This combination develops a pulse train

with two blinks followed by a gap with the on times of the LED equal to 125 ms.

If the default values of this register or the PTC11 register are modified, synchronization to LED flash rates

programmed in other VSC060 devices is disabled.

The following table shows the bit assignments for the Pulse Train Control 10 register.

PTC10

Address:

72h

Reset Value:

0000_0000b

Bit

Bit Label

Access

Description

7:0

PT7-0

R/W

Pulse Train

These eight bits are the first bits shifted out from 0 to 7 and define the on/off

time for the flash rate.

1: defines LED on time

0: defines LED off time.

VSC060 bảng dữ liệu(PDF) 87 Page - Maxim Integrated Products