mc68hc908ey16a Freescale Semiconductor, Inc, mc68hc908ey16a Datasheet - Page 200

• Manufacturer Part Number: mc68hc908ey16a
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Timebase Module (TBM)
16.5 TBM Interrupt Rate
The interrupt rate is determined by the equation:
where:
200
FROM ICG MODULE
f
Divider = Divider value as determined by TBR2–TBR0 settings. See
TBMCLK
FROM CONFIG2
TMBCLKSEL
TBMCLK
= Frequency supplied from the internal clock generator (ICG) module
2
2
2
2
2
MC68HC908EY16A • MC68HC908EY8A Data Sheet, Rev. 1
2
2
Figure 16-1. Timebase Block Diagram
t
2
TBMRATE
2
PRESCALER
DIVIDE
BY 128
2
2
=
----------------------- -
f
TBMRATE
2
2
1
2
2
=
-------------------- -
f
Divider
TBMCLK
0 0 0
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
1 1 0
1 1 1
1
0
Table
16-1.
TBON
R
Freescale Semiconductor
TBIF
TBMINT
TBIE