Overview Of 16-Bit Reload Timer; Figure 12.1-1 16-Bit Reload Timer Registers - Fujitsu MB91F109 FR30 Hardware Manual

CHAPTER 12 16-BIT RELOAD TIMER

12.1 Overview of 16-bit Reload Timer

The 16-bit reload timer consists of a 16-bit decrementing counter, 16-bit reload
register, internal count clock pulse generation prescaler, and control register.
An input clock can be selected from three types of internal clock frequencies (machine
clock frequency divided by 2, 8, or 32).
An interrupt can be used to start DMA transfer.
The MB91F109 contains three channels of 16-bit reload timer.
The channel-2 T0 output of the reload timer is connected to the A/D converter inside
the LSI chip. Therefore, A/D conversion can be started periodically as specified in the
reload register.
16-Bit Reload Timer Registers
Figure 12.1-1 shows the 16-bit reload timer registers.
15
7
MOD0 OUTE OUTL RELD
15
15
282

Figure 12.1-1 16-Bit Reload Timer Registers

14 13 12 11
CSL1
6 5 4 3
INTE
10 9 8
CSL0 MOD2 MOD1
2 1 0
UF CNTE TRG
0
0
(TMCSR)
Control status register
16-bit timer register
(TMR)
16-bit reload register
(TMRLR)