CCU 3000, CCU 3000-I
CCU 3001, CCU 3001-I
Apartfromthestartvaluesforthecounterandadderreg-
isters, three control registers shift the timer into the
preselected function.
Registers to control the timer:
2 bytes
prescaler high and low byte (read/write)
(read: prescaler)
(write: prescaler and reload register)
accu high and low byte (write)
(write: accu and reload register)
adder register high and low byte
(read/write)
2 bytes
2 bytes
3 bytes
control register 1 to 3 (write)
1/2 LOAD
+
EDGE
Q
Q
+
D
D
START
Q
CLR
CLR
D0...D7
D0...D7
WR
WR
REACCU
REACCU
CI
CO
A
CO
CI
B
+
D
LOAD
LOAD
LSB IN MSB
LSB IN MSB
+
Q
STOP
+
CLR
fosc
Φ2
CLOCK
PIN
PIN
STOP
Presc. in
Presc. out
Fig. 2–15: Prescaler timer, start/stop logic
16
MICRONAS INTERMETALL
MICRONAS [ MICRONAS ]
