Motorola ColdFire MCF5281 - Manual (Page 370)

General Purpose Timer Modules (GPTA and GPTB)
20-2 Freescale Semiconductor
20.2 Block Diagram
Figure 20-1. GPT Block Diagram
Prescaler
Channel 0
PT0
16-Bit Counter
System
LOGIC
PR[2:0]
Divide-by-64
GPTC0H:GPTC0L
EDGE
DETECT GPTPACNTH:GPTPACNTL PAOVF
PEDGE
PAOVI
PAMOD
PAE
16-Bit Comparator
GPTCNTH:GPTCNTL
16-Bit Latch
CHANNEL 1
GPTC1H:GPTC1L
16-Bit Comparator
16-Bit Latch
16-Bit Counter
Interrupt
Logic
TOF
TOI
C0F
C1F
Edge
Detect
PT1
LOGIC
Edge
Detect
CxF
Channel 2
Channel3
GPTC3H:GPTC3L
16-Bit Comparator
16-Bit Latch
C3F
PT3
LOGIC
Edge
Detect
IOS0
IOS1
IOS3
OM:OL0
TOV0
OM:OL1
TOV1
OM:OL3
TOV3
EDG1A
EDG1B
EDG3A
EDG3B
EDG0A
EDG0B
TCRE
Channel 3 Output Compare
PAIF
Clear Counter
PAIF
PAI
Interrupt
Logic
CxI
Interrupt
Request
Interrupt
Request
PAOVF
CH. 3 Compare
CH.3 Capture
CH. 1 Capture
MUX
CLK[1:0]
PACLK
PACLK/256
PACLK/65536
PACLK PACLK/256
PACLK/65536
TE
Clock
CH. 1 Compare
CH. 0 Compare
CH. 0 Capture
PA Input
MUX
GPTx0
Pin
GPTx1
Pin
GPTx3
Pin
X
SYNCx
Pin
Divide
by 2
Divide
by 2
System
Clock
MCF5282 and MCF5216 ColdFire Microcontroller User’s Manual, Rev. 3