Register Descriptions; Timer Mode Register A (Tma) - Renesas H8 Series Hardware Manual

10.3

Register Descriptions

Timer A has the following registers.

• Timer mode register A (TMA)

• Timer counter A (TCA)
10.3.1 Timer Mode Register A (TMA)
TMA selects the operating mode, the divided clock output, and the input clock.
Bit Bit Name
7 TMA7
6 TMA6
5 TMA5

4
3 TMA3
Initial
Value R/W Description
0 R/W Clock Output Select 7 to 5
0 R/W These bits select the clock output at the TMOW pin.
000: φ/32
0 R/W
001: φ/16
010: φ/8
011: φ/4
100: φ
101: φ
110: φ
111: φ
For details on clock outputs, see section 10.4.3, Clock
Output.

1 Reserved
This bit is always read as 1.
0 R/W Internal Clock Select 3
This bit selects the operating mode of the timer A.
0: Functions as an interval timer to count the outputs of
1: Functions as a clock-time base to count the outputs of
/32
w
/16
w
/8
w
/4
w
prescaler S.
prescaler W.
Rev. 1.00 Aug. 28, 2006 Page 145 of 400
Section 10 Timer A
REJ09B0268-0100