MC68HC908EY16 Datasheet, PDF (190/278 Pages) Motorola, Inc – Microcontrollers

Timebase Module (TBM)
TMBCLKSEL
FROM CONFIG2
0
TBMCLK
DIVIDE
FROM ICG MODULE
BY 128
1
PRESCALER
÷2 ÷2 ÷2
÷2
÷2
÷2
÷2
TBON
÷2 ÷2 ÷2 ÷2
÷2 ÷2
÷2 ÷2
TBMINT
000
001
010
011
100
101
110
111
Figure 16-1. Timebase Block Diagram
TBIF
TBIE
R
16.4 Interrupts
The timebase module can periodically interrupt the CPU with a rate defined by the selected TBMCLK and
the select bits TBR2–TBR0. When the timebase counter chain rolls over, the TBIF flag is set. If the TBIE
bit is set, enabling the timebase interrupt, the counter chain overflow will generate a CPU interrupt
request.
Interrupts must be acknowledged by writing a 1 to the TACK bit.
MC68HC908EY16 • MC68HC908EY8 Data Sheet, Rev. 10
190
Freescale Semiconductor