PC97338 datasheet(175/221 Pages) NSC

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TABLE 91. MIR Beginning Flags

5.21 BANK 7

TABLE 92. Bank 7 Register Set

5.21.1 IRRXDC – Infrared Receiver

Demodulator Control Register

After reset, the content of this register is 29h, select-

ing a frequency range from 34.61 kHz to 38.26 kHz

for the CEIR mode, and from 480.0 kHz to 533.3 kHz

for Sharp-IR mode. The value of this register is ig-

nored if receiver demodulation for both Sharp-IR and

CEIR mode is disabled. The available frequency

ranges for CEIR and Sharp-IR modes are given in

Table 93 through Table 95.

FIGURE 88. Intrared Receiver Demodulator

Control Register

ENCODING

Beginning Flags

0000

Reserved

0001

0010

2 (Default)

0011

0100

0101

0110

0111

1000

1001

1010

1011

1100

1101

1110

1111

Reserved

Address

Offset

Name

Description

00h

IRRXDC

Infrared Receiver Demodulator

Control

01h

IRTXMC

Infrared Transmitter Modulator

Control

02h

RCCFG

CEIR Configuration Register

03h

LCR/BSR

Link Control/

Bank Select Registers

04h

IRCFG1

Infrared Interface

Configuration Register 1

05h

IRCFG2

Infrared Interface

Configuration Register 2

06h

IRCFG3

Infrared Interface

Configuration Register 3

07h

IRCFG4

Infrared Interface

Configuration Register 4

B4–0 DFR [4–0] – Demodulator Frequency.

These bits determine the subcarrier's center

frequency for the CEIR mode.

B7–5 DBW [2–0] – Demodulator Bandwidth.

These bits determine the demodulator band-

width within which the subcarrier signal fre-

quency has to fall in order for the signal to be

accepted.

Used for both Sharp-IR and CEIR modes.

432

Reset

Required

DFR2

DFR4

DBW0

DBW1

DBW2

DFR0

DFR1

DFR3

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