MC68HC05SU3A Datasheet, PDF (44/80 Pages) Freescale Semiconductor, Inc – Fully static chip design featuring the industry standard 8-bit M68HC05 core

Freescale Semiconductor, Inc.
8
Timer Data Register ($08)
8
8-bit count-down timer counter
7-bit prescaler counter
RST
6
8
Overflow
Detect
Circuit
Interrupt Circuit
Prescaler
Select
Logic
(8 to 1 MUX)
8
TIF TIM TCEX TINE PRER PR2 PR1 PR0
Timer Control Register ($09)
Clock Source
Logic
TIMER
Internal Processor Clock
TCEX TINE
Clock Source
0
0
Internal clock to timer
0
1
“AND” of internal clock and TIMER pin to timer
1
0
Input clock to timer disabled
1
1
TIMER pin to timer
Figure 6-1 Timer Block Diagram
TPG
TIMER
MC68HC05SU3A
6-2
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