7906 datasheet(431/531 Pages) RENESAS

431 / 531 page

7906 Group User’s Manual Rev.2.0

APPENDIX

20-26

Appendix 2. Control registers

s Timer mode

Operating mode select bits

These bits are invalid in timer mode.

This bit is invalid in timer mode; its value is undefined at reading.

Count source select bits

Undefined

15 to 0 Any value in the range from “000016” to “FFFF16” can be set.

Assuming that the set value = n, the counter divides the count source frequency by (n + 1).

When reading, the register indicates the counter value.

(b15)

(b8)

Timer B0 register (Addresses 5116, 5016)

Timer B1 register (Addresses 5316, 5216)

Timer B2 register (Addresses 5516, 5416)

Timer Bi mode register (i = 0 to 2) (Addresses 5B16 to 5D16)

b7 b6 b5 b4 b3 b2 b1 b0

0 0 : Timer mode

b1 b0

0 0 : f2

0 1 : f16

1 0 : f64

1 1 : f512

b7 b6

X : It may be either “0” or “1.”

Undefined

Note: Reading from or writing to this register must be performed in a unit of 16 bits.

Bit

Function

At reset

R/W

Bit name

Bit

Function

At reset

R/W

Reference

8-9

Reference

8-9

8-7

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