
MC97F6108A User’s manual
8. Basic Interval Timer (BIT)
77
8
Basic Interval Timer (BIT)
MC97F6108A has a free running 8-bit Basic Interval Timer (BIT). BIT generates the time base for
watchdog timer counting, and provides a basic interval timer interrupt (BITF).
BIT of MC97F6108A features the followings:
During Power On, BIT gives a stable clock generation time
On exiting Stop mode, BIT gives a stable clock generation time
As a timer, BIT generates a timer interrupt.
8.1
BIT block diagram
In this section, basic interval timer of MC97F6108A is described in a block diagram.
BITR (8-bit COUNT)
BIT_CLK
BIT Interrupt Generator
BIT Out Generator
BIT Interrupt Flag
BIT_OUT
(WDT clock source)
BIT_CLK
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
BITR
BIT_Int_Flag
BIT_Out
BPD[2:0] = 001b
BCK[1:0]
BPD[2:0]
1/2048
1/256
1/16
1/2
fSYS
fWDTRC
BWDTRC
Figure 24. Basic Interval Timer Block Diagram
8.2
BIT register map
Table 11. Basic Interval Timer Register Map
Name
Address
Direction
Default
Description
BCCR
8BH
R/W
05H
Basic Interval Timer Clock Control Register
BITR
8CH
R
00H
Basic Interval Timer Register