X80140, X80141, X80142, X80143, X80144

FN8153 Rev 0.00

Page 13 of 18

January 20, 2005

TABLE 4. REGISTER ADDRESS MAP

BYTE

ADDR.

NAME

CONTROL/STATUS

BIT

MEMORY

TYPE

7

6543210

00H

CR0

Write Enable

WEL

0000000

Volatile

01H

CR1

EEPROM Block

Control

WPEN

0

0

BP1

BP0

0

0

0

EEPROM

02H

CR2

POR Timing

0000

TPOR1

TPOR0

00

EEPROM

03H

CR3

ViGDO Time Delay

T4D1

T4D0

T3D1

T3D0

T2D1

T2D0

T1D1

T1D0

EEPROM

FF

FDR

Fault Detection

Register

0000

V40S

V30S

V20S

V10S

Volatile

TABLE 5. HARDWARE/SOFTWARE CONTROL AND FAULT DETECTION BITS SUMMARY

OPERATION

CONTROL

/STATUS

LOCATION(S)

DESCRIPTION (SEE FUNCTIONAL FOR DETAILS)

REGISTER

BITS

SOFTWARE CONTROL BITS

EEPROM Write Enable

WEL

CR0

7

WEL = 1 enables write operations to the control registers and

EEPROM.

WEL = 0 prevents write operations.

EEPROM Write Protect

WPEN

CR1

7

WPEN = 1 (and WP pin HIGH) prevents writes to the control registers and

the EEPROM.

EEPROM Block Protect

BP1

BP0

CR1

4:3

BP1=0, BP0=0 : No EEPROM memory protected.

BP1=0, BP0=1 : Upper 1/4 of EEPROM memory protected

BP1=1, BP0=0 : Upper 1/2 of EEPROM memory protected.

BP1=1, BP0=1 : All of EEPROM memory protected.

RESET Time Delay

TPOR1

TPOR0

CR2

3:2

TPOR1=0, TPOR0=0 : RESET delay = 100ms

TPOR1=0, TPOR0=1 : RESET delay = 500ms

TPOR1=1, TPOR0=0 : RESET delay = 1s

TPOR1=1, TPOR0=1 : RESET delay = 5s

V1GDO Time Delay

T1D1

T1D0

CR3

1:0

TiD1=0, TiD0=0 : ViGDO delay = 100ms

TiD1=0, TiD0=1 : ViGDO delay = 500ms

TiD1=1, TiD0=0 : ViGDO delay = 1s

TiD1=1, TiD0=1 : ViGDO delay = 5s

V2GDO Time Delay

T2D1

T2D0

CR3

3:2

V3GDO Time Delay

T3D1

T3D0

CR3

5:4

V4GDO Time Delay

T4D1

T4D0

CR3

7:6

STATUS BITS

1st Voltage Monitor

V1OS

FDR

0

V1OS = 0 : V1GDO pin has been asserted (must be preset to 1).

2nd Voltage Monitor

V2OS

FDR

1

V2OS = 0 : V2GDO pin has been asserted (must be preset to 1).

3rd Voltage Monitor

V3OS

FDR

2

V3OS = 0 : V3GDO pin has been asserted (must be preset to 1).

4th Voltage Monitor

V4OS

FDR

3

V4OS = 0 : V4GDO pin has been asserted (must be preset to 1).