Timer Data Register (Tcdth, Tcdtl) - Fujitsu MB91260B Series Hardware Manual

CHAPTER 11 MULTIFUNCTIONAL TIMER
11.4.2

Timer Data Register (TCDTH, TCDTL)

The timer data register (TCDTH, TCDTL) is used to read the count value of the 16-bit
free-run timer.
■ Timer Data Register (TCDTH, TCDTL)
Timer data register (Upper)
TCDTH
Address: 0000A6
Read/Write →
Initial value →
Timer data register (Lower)
TCDTL
Address: 0000A7
Read/Write →
Initial value →
The timer data register is used to read the count value of the 16-bit free-run timer. The count value is
cleared to "0000
value. However, write a value while the timer is stopped (the lower of the timer state control register
(TCCSL), STOP: bit6 = 1). To access the timer data register, use a halfword or word access instruction.
16-bit free-run timer is initialized immediately when the following factors occur.
• Reset
• Clear bit of the timer state control register (TCCSL) (SCLR: bit4) = 1
• Match of the compare clear register and the timer count value in the up count mode (the lower of the
timer state control register (TCCSL), MODE: bit5 = 0)
220
Bit15 Bit14
T15 T14
H
R/W R/W
(0) (0)
Bit7 Bit6
T07 T06
H
R/W R/W
(0) (0)
" immediately when a reset occurs. Writing the value to this register can be set the timer
H
Bit13 Bit12 Bit11
T13 T12 T11
R/W
R/W R/W
(0) (0) (0)
Bit5 Bit4 Bit3
T05 T04 T03
R/W
R/W R/W
(0) (0) (0)
Bit10 Bit9 Bit8
T10 T09 T08
R/W R/W R/W
(0) (0) (0)
Bit2 Bit1 Bit0
T02 T01 T00
R/W R/W R/W
(0) (0) (0)