16

06/19/2000

GL600USB/GL600USB-A/GL600USB-B

Revision 1.3

Value on POR: “- - 0 - - 0 0 0”

INDAR: (Address 04h/84h, Indirect address register)

R/W

R/W

R/W

R/W

R/W

R/W

R/W

R/W

INDAR7

INDAR6

INDAR5

INDAR4

INDAR3

INDAR2

INDAR1

INDAR0

Any instruction using the INDF register actually accesses the register pointed by the INDAR register.

Value on POR: “x x x x x x x x”

[1]

Note 1: “x” means unknown

PORT1 (Address 06h, Port 1 data register)

R/W

R/W

R/W

R/W

R/W

PORT1.4

PORT1.3

PORT1.2

PORT1.1

PORT1.0

PORT1 is a 5-bits latch for Port 1.0~Port 1.4. Reading the PORT1 register gets the status of the pins.

Writing to it will write to the port latch. All write operations are read-modify-write operations.

PORT1CON is used to enable/disable every bits of the port latch.

Value on POR: “- - - x x x x x”

PORT2 (Address 07h, Port 2 data register)

R/W

R/W

R/W

R/W

R/W

R/W

R/W

R/W

PORT2.7

PORT2.6

PORT2.5

PORT2.4

PORT2.3

PORT2.2

PORT2.1

PORT2.0

PORT2 is an 8-bits latch for Port 2.0~Port 2.7. Reading the PORT2 register reads the status of the pins.

Writing to it will write to the port latch. All write operations are read-modify-write operations.

PORT2CON is used to enable/disable every bits of the port latch.

Value on POR: “x x x x x x x x”

PCHBUF (Address 0Ah/8Ah, Write buffer of Program Counter’s bit 10-8)

R/W

R/W

R/W

PCHBUF2

PCHBUF1

PCHBUF0

Write buffer for upper 3-bits of Program Counter. The upper byte of Program Counter is not directly

accessible. PCHBUF is a holding register for the PC[10:8] that are transferred to the upper byte of the

Program Counter when branch occur. Please see PCL register to get more detail information.

Value on POR: “- - - - - 0 0 0”

INTEN (Address 0Bh/8Bh, Interrupt enable register)

R/W

R/W

R/W

GIE

TMROEN

TMROF

GIE: Global interrupt enable bit

1: Enable all interrupts

0: Disable all interrupts

TMROEN: Timer overflow interrupt enable bit

1: Enable timer interrupt

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