mc68hc705c4acfn Freescale Semiconductor, Inc, mc68hc705c4acfn Datasheet - Page 86

• Manufacturer Part Number: mc68hc705c4acfn
• Description: M68hc05 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Capture/Compare Timer
Technical Data
86
TCAP
$0012
SELECT/
DETECT
LOGIC
EDGE
TIMER CONTROL REGISTER
Because of the 16-bit timer architecture, the I/O registers for the input
capture and output compare functions are pairs of 8-bit registers.
Because the counter is 16 bits long and preceded by a fixed
divide-by-four prescaler, the counter rolls over every 262,144 internal
clock cycles. Timer resolution with a 4-MHz crystal is 2 s.
OCRH ($0016)
ICRH ($0014)
TRH ($0018)
Figure 8-1. Timer Block Diagram
16-BIT COMPARATOR
INTERNAL DATA BUS
16-BIT COUNTER
Capture/Compare Timer
OCRL ($0017)
ICRL ($0015)
TRL ($0019)
TIMER STATUS REGISTER
MC68HC705C4A • MC68HSC705C4A — Rev. 3.0
ATRH ($001A)
4
$0013
INTERNAL CLOCK (XTAL 2)
CONTROL
LOGIC
PIN
ATRL ($001B)
INTERRUPT
REQUEST
TIMER
TCMP
MOTOROLA