17

06/19/2000

GL600USB/GL600USB-A/GL600USB-B

Revision 1.3

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.

0: Indicate the corresponding pin on Port 2 cannot be used in input mode. But even firmware

cannot read this pin directly from Port 2 directly, this pin can be selected with PHSEL and

firmware can get its state from PHVAL also.

Value on POR: “0 0 0 0 0 0 0 0”

PSCON (Address 81h, Prescaler control register)

R/W

R/W

R/W

R/W

PSDIS

PS2

PS1

PS0

PSDIS: Prescaler disable bit

1: Set prescaler disable

0: Set prescaler enable

PS[2:0]: Prescaler rate select bits. These bits are used to control timer speed. The following table means

that how many instruction cycles the TIMER register should be added by 1 when PSDIS = 0.