TMPR3911 datasheet(239/462 Pages) TOSHIBA

239 / 462 page

Chapter 10 IR Module

10-9

10.5.2

IR Control 2 Register

OFFSET

= $0A4:

write-only

Bit

Label

RESET

Read/Write

31-24

PER[7:0]

23-16

ONTIME[7:0]

15-8

DELAYVAL[7:0]

7-0

WAITVAL[7:0]

PER[7:0]:

write-only

These bits are used to define the period of the Consumer IR pulses. The bits are loaded into an 8-

bit down-counter that counts at the rate defined by the Baud Value. The resulting period is given by

the following equation. (fIRCLK is the frequency of the IR master clock (IRCLK).)

Period

= (PER + 1) * (BAUDVAL + 1) * (1/fIRCLK)

ONTIME[7:0]:

write-only

These bits are used to define the On Time of the Consumer IR pulses. These bits are loaded into

an 8-bit down-counter that counts at the rate defined by the Baud Value. The resulting On Time is

given by the following equation.

On Time

= ONTIME * (BAUDVAL + 1) * (1/fIRCLK)

DELAYVAL[7:0]:

write-only

These bits are used to define the amount of time that the RXPWR pin will be a logic “1” when

the Carrier State Machine logic is enabled. The bits are loaded into an 8-bit down-counter that

counts at a 7.8 ms rate. Thus the time is programmable from 7.8 ms to 2.0 seconds.

Delay Time

= (DELAYVAL + 1) *7.8 ms

WAITVAL[7:0]:

write-only

These bits are used to define the amount of time to wait before asserting the RXPWR pin to a

logic “1” when the Carrier State Machine logic is enabled. The bits are loaded into an 8-bit down-

counter that counts whenever the DELAYVAL counter reaches a count of zero. Thus the time is

programmable from 7.8 ms to 511 seconds.

Wait Time

= (DELAYVAL + 1) * (WAITVAL + 1) *7.8 ms

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