beautypg.com

3 4 mhz timer data register (24 bits) (cutr) – FUJITSU MB91460 SERIES FR60 User Manual

Page 988

background image

972

Chapter 50 Subclock Calibration Unit

5.Register Description

5.3 4 MHz Timer Data Register (24 bits) (CUTR)

The Timer Data Register (CUTR) holds the value of the calibration result (4MHz counter)

Precaution: Reading this register during calibration, results in random values.

The end of calibration is indicated by the INT-bit and the STRT-bit
in the CUCR-register.
After INT has changed from 0 to 1 / STRT has changed from 1 to 0,
the value of CUTR is valid.

The 4MHz Timer Data Register stores the result of the calibration. When the calibration is started,
the 4MHz Timer starts counting up from zero. When the 32kHz/100kHz Timer reaches zero, the
4MHz Timer stops counting and the register holds the calibration result until the next calibration is
triggered by software.

Reading this register during calibration, results in random values.

The end of calibration is indicated by the INT-bit and the STRT-bit in CUCR-register. After these
bits changed from 0 to 1, resp. 1 to 0, the value of CUTR is valid.

Writing into this register by software has no effect.

The 4MHz Timer operates with the 4MHz oscillation clock.

TDR7 TDR6 TDR5 TDR4 TDR3 TDR2 TDR1 TDR0

Bit no.

Read/write

(R)

(R)

(R)

(R)

(R)

(R)

(R)

(R)

Default value

(0)

(0)

(0)

(0)

(0)

(0)

(0)

(0)

Address : 0004B7

H

7

6

5

4

3

2

1

0

CUTR2L

4MHz

Timer Register2 low byte

TDR15TDR14 TDR13 TDR12 TDR11TDR10

TDR9 TDR8

Bit no.

Read/write

(R)

(R)

(R)

(R)

(R)

(R)

(R)

(R)

Default value

(0)

(0)

(0)

(0)

(0)

(0)

(0)

(0)

4MHz Timer Register2 high byte

Address : 0004B6

H

15

14

13

12

11

10

9

8

CUTR2H

TDR23 TDR22 TDR21TDR20 TDR19 TDR18 TDR17TDR16

Bit no.

Read/write

(R)

(R)

(R)

(R)

(R)

(R)

(R)

(R)

Default value

(0)

(0)

(0)

(0)

(0)

(0)

(0)

(0)

Address : 0004B5

H

7

6

5

4

3

2

1

0

CUTR1L

4MHz

Timer Register1 low byte

-

-

-

-

-

-

-

-

Bit no.

Read/write

(R)

(R)

(R)

(R)

(R)

(R)

(R)

(R)

Default value

(0)

(0)

(0)

(0)

(0)

(0)

(0)

(0)

4MHz Timer Register1 high byte

Address :

0004B4H

15

14

13

12

11

10

9

8

CUTR1H