F81216DG View Datasheet(PDF) - Feature Integration Technology Inc.

Part Name

Description

Manufacturer

F81216DG

LPC to 4 UART

Feature Integration Technology Inc. 

5

DSR

4

CTS

3

DDCD

F81216

OUT1 in MCR

R

Complement of DSR# input. In loop back mode , this bit is

equivalent to DTR in MCR

R

Complement of CTS# input. In loop back mode , this bit is equivalent

to RTS in MCR

R

0 : No state changed at DCD#.

1 : State changed at DCD#.

2

TERI

1

DDSR

0

DCTS

R

0 : No Trailing edge at RI#.

1 : A low to high transition at RI#.

R

0 : No state changed at DSR#.

1 : State changed at DSR#.

R

0 : No state changed at CTS#.

1 : State changed at CTS#.

5.2.1.11 Scratch Register – Base + 7

Power-on default [7:0] = 0x00h.

Bit

Name

R/W

7:0 SCR_DATA[7:0] R/W Scratch register.

Description

5.3 IR Function

The F81216 infrared interface provides a two way wireless communications port using

infrared as the transmission medium. The IrDA 1.0 (SIR) is found in UART1 IrDA SIR specifies

asynchronous serial communication at baud rate up to 115.2Kbps. Each byte is sent serial LSB first

beginning with a zero value start bit. A zero is signaled by sending a single infrared pulse at the

beginning of the serial bit time. A one is signaled by the absence of an infrared pulse during the bit

time. IRTX acts as a transmit pin and IRRX acts as a receiving one. As for detail description, please

refer to register description.

5.4 Watch Dog Timer Function

Watch dog timer is provided for system controlling. If time-out can trigger one signal to low

level, the signal default is tri-state (need external pull up resister).

The time interval has three ways:

One is the hardware power on setting to enable, timer set to 10 second (24MHz). If 48MHz

clock input, the timer is set to 5 second.

-13-

August, 2007

V0.32P

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