Renesas Hitachi H8S/2191, Hardware Manual

Page: 324 / 1065

Rev. 2.0, 11/00, page 297 of 1037
13.2 Descriptions of Respective Registers
13.2.1 Timer Mode Register B (TMB)
0
0
1
0
R/W
2
0
R/W
3
1
4
— —
— —
1
5
0
6
0
7
R/W R/W
TMBIE
R/(W)
*
TMBIF
0
R/W
TMB17 TMB12 TMB11 TMB10
Note: Only 0 can be written to clear the flag.
Bit :
Initial value :
R/W :
The TMB is an 8-bit read/write register which works to control the interrupts, to select the auto
reloading function and to select the input clock.
When reset, the TMB is initialized to H'18.
Bit 7: Selecting the Auto Reloading Function (TMB17)
This bit works to select the auto reloading function of the Timer B.
Bit 7
TMB17 Description
0 Selects the interval function (Initial value)
1 Selects the auto reloading function
Bit 6: Interrupt Requesting Flag for the Timer B (TMBIF)
This is an interrupt requesting flag for the Timer B. It indicates the fact that the TCB is
overflowing.
Bit 6
TMBIF Description
0 [Clearing conditions] (Initial value)
When 0 is written after reading 1
1 [Setting conditions]
When the TCB overflows