SM8580AM

SEIKO NPC CORPORATION —18

CE1 Control Register (Bank 1, Register B)

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This register determines whether the temperature sensor function and digital correction function in combina-

tion with the CE1 input pin. CTEMP determines the temperature sensor operation, and CDT_ON determines

the digital correction function operation.

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CTEMP bit

When CTEMP is set to 0, the temperature sensor operates only when the CE1 pin is HIGH.

When CTEMP is set to 1, the temperature sensor operates without any relationship to the CE1 input state.

Note that the temperature sensor operation also depends on the bank 2 TEMP bit to be active.

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CDT_ON bit

When CDT_ON is set to 0, the digital correction function operates only when the CE1 pin is HIGH.

When CDT_ON is set to 1, the digital correction function operates without any relationship to the CE1 input

state.

Note that the digital correction function also depends on the bank 2 DT_ON bit to be active.

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Function operation tables

Bank

Address

Register

Bit 3

Bit 2

Bit 1

Bit 0

1

B

CE1 control

CTEMP

CDT_ON

CE1 pin

CTEMP bit

TEMP bit

Temperature sensor

××

0

Not operating

LOW

0

1

Not operating

HIGH

0

1

Operating

LOW

1

1

Operating

HIGH

1

1

Operating

CE1 pin

CDT_ON bit

DT_ON bit

Digital correction

××

0

Not operating

LOW

0

1

Not operating

HIGH

0

1

Operating

LOW

1

1

Operating

HIGH

1

1

Operating