Timer Data Register (Tcdt) - Fujitsu MB90460 Series Hardware Manual

CHAPTER 14 MULTI-FUNCTIONAL TIMER
14.4.2

Timer Data Register (TCDT)

The timer data register (TCDT) is used to read the count value of 16-bit free-run timer.
■ Timer Data Register (TCDT)
Timer Data Register (Upper)
Address: 00005D
Read/write
Initial value
Timer Data Register (Lower)
Address: 00005C
Read/write
Initial value
The timer data register is used to read the count value of the 16-bit free-run timer. The counter value is
cleared to "0000
ensure that the value is written while the operation is stopped (STOP = 1). Word access instruction to the
timer data register is recommended.
The 16-bit free-run timer is initialized upon the following factors:
• Reset
• Clear bit (SCLR) of control status register
• A match between compare clear register and the timer counter value in up-count mode
(TCCSL:MODE=0)
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Figure 14.4-7 Timer Data Register
bit 15 14 13
T15 T14 T13
H
R/W R/W R/W
0 0 0
bit
7 6
T07 T06 T05
H
R/W R/W R/W
0 0
" upon a reset. The timer value can be set by writing a value to this register. However,
H
12 11 10
T12 T11 T10
R/W R/W R/W
0 0 0
5 4 3 2
T04 T03 T02
R/W R/W R/W
0 0 0
9 8
T09 T08
TCDT
R/W R/W
0 0
1 0
T01 T00
R/W R/W
0 0 0
TCDT