MC68HC05B4 Datasheet, PDF (60/298 Pages) Motorola, Inc – High-density Complementary Metal Oxide Semiconductor (HCMOS) Microcomputer Unit

High Low
byte byte
Internal bus
Internal
processor
clock
8-bit
buffer
High Low
byte byte
High Low
byte byte
8
High Low
byte byte
High Low
byte byte
Output
compare
register 1
$0016
$0017
Output
compare
register 2
$001E
$001F
÷4
16-bit
free-running
counter
$0018
$0019
Input capture $0014 Input capture $001C
register 1 $0015 register 2 $001D
5
To PLM
COP watchdog
counter input
Counter
alternate
register
$001A
$001B
Internal timer bus
Output
compare
circuit 1
Output
compare
circuit 2
Overflow
detect
circuit
Edge
detect
circuit 1
Edge
detect
circuit 2
TCAP2
pin
TCAP1
pin
DQ
+ ^C _Latch
TCMP2
pin
DQ
7
6
5
ICF1 OCF1 TOF
4
3
Timer status
+ ^C _Latch
ICF2 OCF2 register
$0013
Timer control
ICIE OCIE TOIE FOLV2 FOLV1 OLVL2 IEDG1 OLVL1
register
$0012
Interrupt circuit
Input capture
interrupt
$1FF8,9
Output compare
interrupt
$1FF6,7
Overflow interrupt
$1FF4,5
TCMP1
pin
Figure 5-1 16-bit programmable timer block diagram
MOTOROLA
5-2
PROGRAMMABLE TIMER
TPG
MC68HC05B6
Rev. 4