s908gz60cfa Freescale Semiconductor, Inc, s908gz60cfa Datasheet - Page 260

• Manufacturer Part Number: s908gz60cfa
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Timebase Module (TBM)
17.5 TBM Interrupt Rate
The interrupt rate is determined by the equation:
where:
260
FROM CGM MODULE
f
Divider = Divider value as determined by TBR2–TBR0 settings and TMBCLKSEL, see
CGMXCLK
FROM CONFIG2
TMBCLKSEL
t
TBMRATE
CGMXCLK
=Frequency supplied from the clock generator (CGM) module
=
÷ 2
÷ 2
MC68HC908GZ60 • MC68HC908GZ48 • MC68HC908GZ32 Data Sheet, Rev. 6
f
CGMXCLK
Divider
÷ 2
÷ 2
÷ 2
÷ 2
÷ 2
Figure 17-1. Timebase Block Diagram
÷ 2
DIVIDE BY 128
PRESCALER
÷ 2
÷ 2
÷ 2
÷ 2
÷ 2
÷ 2
÷ 2
0 0 0
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
1 1 0
1 1 1
0
1
TBMCLK
TBON
Freescale Semiconductor
R
TBIF
Table 17-1
TBMINT
TBIE