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7480 Datasheet(PDF) 113 Page - Renesas Technology Corp

Part # 7480
Description  8-BIT SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 7470 SERIES
PDF  337 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

7480 Datasheet(HTML) 113 Page - Renesas Technology Corp

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7480 Group and 7481 Group User's Manual
1-96
HARDWARE
1.13 Timer 1 and Timer 2
(1) Timer 1 and Timer 2
These are the 8-bit registers that count the pulses of count sources.
• When a timer is written, the written data is set to the timer and the timer latch (Note).
• When a timer is read, the read value is the contents of the timer.
Note: The timer latches are the registers that hold the initial values automatically reloaded to the
timers when they underflow. Actually, the value decremented by 1 from the contents of the
timer latch is reloaded to the timer.
Figures 1.13.3 and 1.13.4 show the timer 1 and timer 2.
Figure 1.13.3 Timer 1
Figure 1.13.4 Timer 2
Timer 1 (Timer 1 latch)
b5
b6
b7
b4 b3 b2 b1 b0
b
Function
At reset
1
2
3
4
5
6
7
0
Timer1 (T1) [Address 00F416]
1
The timer 1 count value is indicated.
1
1
1
1
1
1
1
RW
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
Timer 2 (Timer 2 latch)
b5
b6
b7
b4 b3 b2 b1 b0
b
Function
At reset
1
2
3
4
5
6
7
0
Timer 2 (T2) [Address 00F516]
The timer 2 count value is indicated.
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
RW
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O



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