GL640USB datasheet(12/39 Pages) ETC

12 / 39 page

Revision 1.1

Jun. 7, 1999

-11-

GL640USB, GL640USB-A

5Fh

Purpose

Registers

(64 bytes)

Figure 7-2 Data Memory Space

7.2 MCU FUNCTION REGISTERS

Address

Name

Function

00h

INDR

Addressing this location will use the content of INDAR to

address data memory (not a physical address)

01h

TIMER

Timer register

02h

PCL

Program Counter’s low byte

03h

STATUS

Status register

04h

INDAR

Indirect address register

06h

PORT1

Port 1 data register

07h

PORT2

Port 2 data register

0Ah

PCHBUF

Write buffer of Program Counter’s bit 10-8

80h

INDR

Addressing this location will use the content of INDAR to

address data memory (not a physical address)

81h

PSCON

Prescaler control register

82h

PCL

Program Counter’s low byte

83h

STATUS

Status register

84h

INDAR

Indirect address register

86h

PORT1CON

Port 1 direction control register

87h

PORT2CON

Port 2 direction control register

8Ah

PCHBUF

Write buffer of Program Counter’s bit 10-8

Table 7-1 MCU Function Register Summary

INDR (Address 00h/80h)

INDR is not a physical register. Addressing INDR register will cause indirect addressing. Any

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