Pr

eliminar

y

MBF110

Fujitsu Microelectronics, Inc.

7

DCR (A3-A0 Address 0101) Write Only

Discharge Current Register

MSB

LSB

RSR (A3-A0 Address 0110) Write Only

Reserved

The user must initialize this resistor to zero.

MSB

LSB

BIT7

BIT6

BIT5

BIT4

BIT3

BIT2

BIT1

BIT0

F2

F1

TRST

DC4

DC3

DC2

DC1

DC0

Bit Number

Bit Name

Function

[7:6]

F2, F1

These two bits tell the chip the frequency of the external oscillator or crystal that is connected to the chip.

F2

F1

XTAL Input

0

0

10-15 MHz

0

1

15-20 MHz

1

0

20-30 MHz

1

1

30-40 MHz

5

TRST

Timer Reset. Set this bit to halt and reset the Discharge Timer. Resetting the Discharge Timer is necessary to put

the Discharge Timer in a known state after power-up or after returning to Normal mode from Low-power mode

(See bit 7 of DTR).

TRST=0,Normal Timer Operation

TRST=1,Halt and Clear Discharge Timer (doesn’t clear DTR)

[4:0]

DC[4:0]

Selects the Discharge Current source value.

BIT7

BIT6

BIT5

BIT4

BIT3

BIT2

BIT1

BIT0

––––––––

Bit Number

Bit Name

Function

[7:0]

–

Reserved. Write 0 to these bits.