7721 datasheet(486/577 Pages) RENESAS

486 / 577 page

APPENDIX

Appendix 3. Control registers

7721 Group User’s Manual

17–23

Timer Bi register

b0 b7

(b15)

(b8)

Timer B0 register (Addresses 5116, 5016)

Timer B1 register (Addresses 5316, 5216)

Timer B2 register (Addresses 5516, 5416)

Functions

Bit

At reset

15 to 0 These bits have different functions according

to the operating mode.

Undefined

(Note 1)

Notes 1: The access characteristics for the timer B0 register and timer

B1 register differ according to Timer B’s operating mode.

2: Read from or write to this register in a unit of 16 bits.

Timer Bi mode register

Nothing is assigned.

These bits have different functions according to the operating mode.

Operating mode select bits

Bit name

Functions

b7 b6

b5 b4

b3 b2 b1 b0

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

0 0 : Timer mode

0 1 : Event counter mode

1 0 : Pulse period/Pulse width

measurement mode

1 1 : Do not select.

b1 b0

Bit

At reset

Note: Bit 5 is invalid in the timer and event counter modes; its value is undefined at reading.

–

Undefined

(Note)

Undefined

These bits have different functions according to the operating mode.

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