19

09/22/00

GL603USB/GL603USB-A/GL603USB-B

Revision 1.4

0: Disable timer interrupt

TMROF: Timer overflow interrupt flag bit. This bit should be cleared to ‘0’ by firmware after it is set by

hardware.

1: Timer register has overflowed

0: Timer register did not overflow

Value on POR: “0 - 0 - - 0 - -“

PHVAL (Address 0Dh, Photo-sensor value register)

R/O

R/O

R/O

R/O

PHVAL3

PHVAL2

PHVAL1

PHVAL0

PHVAL[3:0]: the 8 channel, 4 bits analog-to-digital converter data. The ADC input is select by PHSEL

register from Port 2.0~Port 2.7

Bit Value

Analog value

0000

0 V - 5/16 V

0001

5/16 V - 5/8 V

0010

5/8 V - 15/16 V

0011

15/16 V - 5/4 V

0100

5/4 V - 25/16 V

0101

25/16 V - 15/8 V

0110

15/8 V - 35/16 V

0111

35/16 V - 5/2 V

1000

5/2 V - 45/16 V

1001

45/16 V - 25/8 V

1010

25/8 V - 55/16 V

1011

55/16 V - 15/4 V

1100

15/4 V - 65/16 V

1101

65/16 V - 75/16 V

1110

75/16 V - 5V

1111

5V

Value on POR: “- - - - x x x x”

PHSEL (Address 0Eh, Photo-sensor analog input select register)

R/W

R/W

R/W

PHSEL2

PHSEL1

PHSEL0

PHSEL[2:0]: The selection register for 8 channel 4 bits, ADC.

Bit Value

Source pin of the ADC

000

PORT2.0

001

PORT2.1

010

PORT2.2

011

PORT2.3

100

PORT2.4

101

PORT2.5

110

PORT2.6

111

PORT2.7

Value on POR: “- - - - - x x x”

DMODE (Address 0Fh, Photo-sensor input mode register)

R/W

R/W

R/W

R/W

R/W

R/W

R/W

R/W

DMODE7

DMODE6

DMODE5

DMODE4

DMODE3

DMODE2

DMODE1

DMODE0

DMODE[7:0]: Individual enabler for Port 2.7~Port 2.0 input buffer.

1: Indicate the corresponding pin on Port 2 can be used in input mode. This pin can be selected

with PHSEL and firmware can get its state from PHVAL also.