Fujitsu MB90460 Series, Hardware Manual, Page: 260 / 739

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CHAPTER 12 16-BIT RELOAD TIMER
12.4.3 16-bit Timer Register (TMR0/TMR1)
The 16-bit timer register (TMR0/TMR1) is always able to read the count value from the
16-bit down counter.
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16-bit Timer Register (TMR0/TMR1)
Figure 12.4-4 shows the 16-bit timer registers (TMR0/TMR1).
Figure 12.4-4 16-bit Timer Register (TMR0/TMR1)
The 16-bit timer register is able to read the counter value from the 16-bit down counter.
When counting is enabled (TMCSRL0/TMCSRL1:CNTE = 1) to start counting, the value written to the 16-
bit reload register is loaded into this register, and counting down starts. This register value is stored in the
counter stop status (TMCSRL0/TMCSRL1:CNTE = 0).
Notes:
• This register is able to read the count value even during counting. It should always be read with a
word transfer instruction (MOVW A, 003AH, etc.).
• Although the 16-bit timer register (TMR0/TMR1) is a read-only register, it is allocated to the same
address as the address of the write-only 16-bit reload register (TMRD0/TMRD1). Accordingly,
writing to this register has no effect on the TMR0/TMR1 value, although writing to TMRD0/TMRD1
is done.
15 14 13 12 11 10 9 8
R
X
R
X
R
X
R
X
R
X
R
X
R
X
R
X
D15 D12 D11 D10 D09 D08
7 6 5 4 3 2 1 0
16-bit Timer Register (Upper)
16-bit Timer Register (Lower)
TMR0/TMR1
TMR0/TMR1
Initial value
Read/write
R
X
R
X
R
X
R
X
R
X
R
X
R
X
R
X
Initial value
Read/write
D07 D06 D05 D04 D03 D02 D01 D00
D13
D14
Address: ch.0 000085
H
ch.1 000089
H
Address: ch.0 000084
H
ch.1 000088
H
bit
bit