7540 datasheet(328/366 Pages) RENESAS

328 / 366 page

3-106

REJ09B0018-0200Z

Rev.2.00

Jun 21, 2004

APPENDIX

7540 Group

3.5 List of registers

Fig. 3.5.15 Structure of Prescaler Y, Prescaler Z

Fig. 3.5.16 Structure of Timer Y secondary, Timer Z secondary

Prescaler Y, Prescaler Z

b7b6b5b4b3b2b1b0

Function

At reset

Prescaler Y (PREY) [Address : 2116]

Prescaler Z (PREZ) [Address : 2516]

• Set a count value of each prescaler.

• While the corresponding timer is stopped, the value set in this

and the corresponding prescaler latch at the same time.

• While the corresponding timer is operating, the value set in this

When the timer write control bit is “0”, the value is written to

prescaler latch and prescaler at the same time.

When the timer write control bit is “1”, the value is written to

prescaler latch only.

• When this register is read out, the count value of the

corresponding prescaler is read out.

Timer Y secondary, Timer Z secondary

b7 b6 b5 b4 b3 b2 b1 b0

Function

At reset

Timer Y secondary, Timer Z secondary (TYS, TZS) [Address : 22 16, 2616]

•Set a count value of the corresponding timer.

•The value set in this register is written to the corresponding

secondary latch at the same time.

•These are read disabled bits.

When these bits are read out, the values are undefined.

7540 Datasheet(PDF) 328 Page - Renesas Technology Corp