16-Bit Timer Register (Tmr0/1); Fig. 10.6 16-Bit Timer Register (Tmr0/1) - Fujitsu MB90420/5 (A) Series Hardware Manual

10.4.3 16-bit timer register (TMR0/1)

The 16-bit timer register (TMR0/1) can read the count value of the 16-bit decrement counter at any time.
n 16-bit timer register (TMR0/1)
Figure 10.6 shows the 16-bit timer register (TMR0/1).
Address
TMR0: 000052
H
TMR1: 000056
H
Address
TMR0: 000053
H
TMR1: 000057
H
R: Read only
X: Undefined
The 16-bit timer register can read the counter value of the 16-bit decrement counter. When the counter is
enabled (TMCSR0/1: CNTE = 1), the value written to the 16-bit reload register is loaded into the this register
to start decrementing. When the counter is stopped (TMCSR0/1: CNTE = 0), the value of the TMR register
is held.
Notes: 1. The TMR register can also be read during counting, but always use a word transfer instruction
(such as MOVW A, 003A
2. The 16-bit timer register (TMR0/1) is a read-only register, but it is allocated to the same address
as the write-only 16-bit reload register (TMRLR0/1L, TMRLR0/1H). Consequently, when a write is
performed, the value of TMR is not affected, but the write is performed to TMRLR0/1L and
TMRLR0/1H.
16-BIT RELOAD TIMER
bit 15 bit 14 bit 13
D15 D14 D13
R R R
bit 7 bit 6 bit 5
D7 D6 D5
R R R

Fig. 10.6 16-bit Timer Register (TMR0/1)

).
H
bit 12 bit 11 bit 10
D12 D11 D10
R R R
bit 4 bit 3 bit 2
D4 D3 D2
R R R
10-13
Initial value
bit 9 bit 8
D9 D8
XXXXXXXX
R R
bit 1 bit 0 Initial value
D1 D0
XXXXXXXX
R R
B
B