MB90F654A FUJITSU [Fujitsu Component Limited.], MB90F654A Datasheet - Page 54

• Manufacturer Part Number: MB90F654A
• Description: 16-bit Proprietary Microcontroller
• Manufacturer: FUJITSU [Fujitsu Component Limited.]

54
MB90650A Series
(1) 16-bit Free-run Timer
The 16-bit free-run timer consists of a 16-bit up-counter, a control register, and a prescaler. The output of the
timer/counter is used as the base time for the input capture and output compare.
• The operating clock for the counter can be selected from four different clocks.
• Interrupts can be generated when a counter value overflow or compare match with compare register 0 occurs
• The counter can be initialized to 0000
• Register details
The count value of the 16-bit free-run timer can be read from this register. The count is cleared to “0000
reset. Writing to this register sets the timer value. However, only write to the register when the timer is halted
(STOP = “1”). Always use word access.
The 16-bit free-run timer is initialized by the following.
• Reset
• The clear bit (CLR) of the control status register
• A match between the timer/counter value and compare register 0 of the output compare (if the appropriate
• Block diagram
Upper timer data register (TCDTH)
Lower timer data register (TCDTL)
Four internal clocks ( /4, /16, /32, /64)
(the appropriate mode must be set for a compare match).
mode is set)
Address : 000066
Address : 000067
R/W : Readable and writable
IVF
H
H
H
by a reset, software clear, or compare match with compare register 0.
IVFE STOP MODE CLR
bit 15
R/W
T15
R/W
bit 7
T07
bit 14
T14
R/W
16-bit up-counter
T06
R/W
bit 6
bit 13
R/W
T13
Interrupt request
R/W
bit 5
T05
bit 12
R/W
T12
Count value output T15 to T00
R/W
bit 4
T04
CLK1 CLK0
Comparator 0
bit 11
R/W
T11
R/W
T03
bit 3
bit 10
R/W
T10
R/W
bit 2
T02
R/W
bit 9
T09
R/W
bit 1
T01
Divider
bit 8
T08
R/W
Clock
bit 0
T00
R/W
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
Initial value
Initial value
B
B
B
” by a