TIR2000 datasheet(51/63 Pages) TI

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4–15

4.14.2

General Purpose I/O Data Register (GPIODAT) – (read and write)

Address = C, Bank 3

Bit No.

Definition

GPIO8

data

GPIP7

data

GPIO6

data

GPIO5

data

GPIO4

data

GPIO3

data

GPIO2

data

GPIO1

data

Default

When a GPIO terminal is in the input mode, the value at the GPIO terminals are latched into the GPIODAT

registers, which the CPU can read. But when a GPIO terminal is in the output mode, internal data is available

at the GPIO terminal. The value at the output terminal depends on the GPIODAT register value, the test pin

of the device and the GPFSR value.

4.14.3

General Purpose Function Select Register (GPFSR) – (write only)

Address D , Bank 3

Bit No.

Definition

GPFSR [7–0]

Default

When the TEST pin is a 0, the value at the GPIO terminal depends on the GPFSR value. When the GPFSR

bit is a 0, the corresponding GPIODAT register bit is available in the GPIO terminal. When, the GPFSR bit

is a 1, some internal signals are available at the GPIO terminals. Refer to the following:

TEST

GPFSR

[7–0]

GPIO7

GPIO6

GPIO5

GPIO4

GPIO3

GPIO2

GPIO1

GPIO0

FIR/MIR

RX clock

FIR/MIR

TX clock

state[1]

state[0]

state[3]

state[2]

state[1]

state[0]

1111_

1111

DDIS

Presc.clk

out

Baudout

0000_

0000

GPIODAT

[7]

GPIODAT

[6]

GPIODAT

[5]

GPIODAT

[4]

GPIODAT

[3]

GPIODAT

[2]

GPIODAT

[1]

GPIODA

T[0]

4.14.4

Ir Mode Configuration Register 1 (IRCFG) – (read and write)

Address A, Bank 3

IR Configuration Register (IRCFG)

Bit No.

[7–4]

Definition

Not used

SIR pulse duration

0: 3/16 of bit rate

1: 1.6-us

Not used

Select IRRVL/IRRVH in TV mode

and SHARP mode

TEMIC bit

Default

Bit definition:

BIT NO.

DESCRIPTIONS

Temic IBM bit. Bit 0 is used for automatic mode selection (High speed/Low speed) in Temic IBM

transceivers

Select IIRVL/IRRVH. Bit 1 selects the IIRVL and IRRVH in the TV and SHARP modes.

Not used

SIR pulse duration select. Bit 3 will determine the selection of either a 1.6

µs or a 3/16 of baud-rate pulse

width.

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