SYNPWM datasheet(11/57 Pages) FEELING

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FM8P73B

Web site: http://www.feeling-tech.com.tw

Rev1.0 Nov 20, 2013

P.11/FM8P73B

FEELING

TECHNOLOGY

2.1.4

FSR (Indirect Data Memory Address Pointer)

Address

Name

04h (r/w)

FSR

Indirect data memory address pointer

Bit6:Bit0 : Select registers address in the indirect addressing mode. See 2.1.1 for detail description.

Bit7 : Not used. Read as 0.

2.1.5

PORTA, PORTB, IOSTA and IOSTB (Port Data Registers and Port Direction Control Registers)

Address

Name

05h (r/w)

IOSTA

IOSTA5

IOSTA4

IOSTA3

IOSTA2

IOSTA1

IOSTA0

06h (r/w)

PORTA

IOA5

IOA4

IOA3

IOA2

IOA1

IOA0

07h (r/w)

IOSTB

IOSTB7

IOSTB6

IOSTB5

IOSTB4

IOSTB2

IOSTB1

IOSTB0

08h (r/w)

PORTB

IOB7

IOB6

IOB5

IOB4

IOB3

IOB2

IOB1

IOB0

Legend: - = unimplemented, read as ‘0’.

The registers (IOSTA and IOSTB) are used to define the input or output of each port.

= 1,

= 0,

Input.

Output.

Reading the port (PORTA and PORTB register) reads the status of the pins independent of the pin’s input/output

modes. Writing to these ports will write to the port data latch. Please refer to 2.2 for detail I/O Port description.

Note: IOB3 is read only.

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