ADM1026
PRELIMINARY TECHNICAL DATA
– 3 6 –
REV. PrL
PRELIMINAR
Y
TECHNICAL
DA
TA
TABLE 13. REGISTER 06H, EEPROM REGISTER 3 (POWER-ON DEFAULT 00H)
Bit
Name
R/W
Description
0
Read
R / W
Setting this bit puts the EEPROM into Read mode.
1
Write
R / W
Setting this bit puts the EEPROM in Write (program) mode.
2
Erase
R / W
Setting this bit puts the EEPROM into Erase mode.
3
Write Protect
Read/Write Setting this bit protects the EEPROM against accidental writing or erasure.
Once
This bit is write-once and can only be cleared by power-on reset.
4
Test Mode bit 0
R / W
Test mode bit. For factory use only.
5
Test Mode bit 1
R / W
Test mode bit. For factory use only.
6
Test Mode bit 2
R / W
Test mode bit. For factory use only.
7
Clock Extend
R / W
Setting this bit enables SMBus clock extension. The ADM1026 can pull SCL
low to extend the clock pulse if it cannot acccept any more data. Used to
extend the clock pulse during repeated EEPROM write or block write
operations.
TABLE 14. REGISTER 07H, CONFIGURATION REGISTER 3 (POWER-ON DEFAULT 00H)
Bit
Name
R/W
Description
0
Enable GPIO16/
R / W
When this bit is 1, pin 42 is enabled as a General Purpose IO pin
THERM = 0
(GPIO16), otherwise it is the
THERM
output.
1
CI Clear = 0
R / W
Writing a 1 to this bit will clear the CI latch. This bit is self clearing.
2
VREF Select = 0
R / W
When this bit is 0, VREF (pin 24) outputs 1.82V, otherwise it outputs 2.5V.
5-3
Unused
R
Undefined, will read back 0.
6
GPIO16 Direction
R / W
When this bit is 0, GPIO16 is configured as an input, otherwise, it is an
output.
7
GPIO16 Polarity
R / W
When this bit is 0, GPIO16 is active low, otherwise it is active high.
TABLE 15. REGISTER 08H, GPIO CONFIGURATION REGISTER 1 (POWER-ON DEFAULT 00H)
Bit
Name
R/W
Description
0
GPIO0 Direction
R / W
When this bit is 0, GPIO0 is configured as an input, otherwise, it is an
output.
1
GPIO0 Polarity
R / W
When this bit is 0, GPIO0 is active low, otherwise it is active high.
2
GPIO1 Direction
R / W
When this bit is 0, GPIO1 is configured as an input, otherwise, it is an
output.
3
GPIO1 Polarity
R / W
When this bit is 0, GPIO1 is active low, otherwise it is active high.
4
GPIO2 Direction
R / W
When this bit is 0, GPIO2 is configured as an input, otherwise, it is an
output.
5
GPIO2 Polarity
R / W
When this bit is 0, GPIO2 is active low, otherwise it is active high.
6
GPIO3 Direction
R / W
When this bit is 0, GPIO3 is configured as an input, otherwise, it is an
output.
7
GPIO3 Polarity
R / W
When this bit is 0, GPIO3 is active low, otherwise it is active high.
