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SN8P1602AX Datasheet(PDF) 58 Page - SONiX Technology Company

Part # SN8P1602AX
Description  8-Bit Micro-Controller
PDF  94 Pages
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Manufacturer  SONIX [SONiX Technology Company]
Direct Link  http://www.sonix.com.tw
Logo SONIX - SONiX Technology Company

SN8P1602AX Datasheet(HTML) 58 Page - SONiX Technology Company

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SN8P1600
8-bit micro-controller
SONiX TECHNOLOGY CO., LTD
Page 58
Revision 1.94
TC1C COUNTING REGISTER
TC1C is an 8-bit counter register for the timer (TC1). TC1C must be reset whenever the TC1ENB is set to “1” to start
the timer. TC1C is incremented each time a clock pulse of the frequency determined by TC1RATE0 ~ TC1RATE2.
When TC1C has incremented to “0FFH”, it counts to “00H” an overflow generated. Under TC1 interrupt service request
(TC1IEN) enable condition, the TC1 interrupt request flag will be set to “1” and the system executes the interrupt
service routine. When TC1C overflows, the TC1C will be restored automatically if ALOAD1 of TC1M register is
enabled.
0DDH
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
TC1C
TC1C7
TC1C6
TC1C5
TC1C4
TC1C3
TC1C2
TC1C1
TC1C0
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
After reset
-
-
-
-
-
-
-
-
The basic timer table interval time of TC1.
High speed mode (fcpu = 3.58MHz / 4)
Low speed mode (fcpu = 32768Hz / 4)
TC1RATE TC1CLOCK
Max overflow interval
One step = max/256
Max overflow interval
One step = max/256
000
fcpu/256
73.2 ms
286us
8000 ms
31.25 ms
001
fcpu/128
36.6 ms
143us
4000 ms
15.63 ms
010
fcpu/64
18.3 ms
71.5us
2000 ms
7.8 ms
011
fcpu/32
9.15 ms
35.8us
1000 ms
3.9 ms
100
fcpu/16
4.57 ms
17.9us
500 ms
1.95 ms
101
fcpu/8
2.28 ms
8.94us
250 ms
0.98 ms
110
fcpu/4
1.14 ms
4.47us
125 ms
0.49 ms
111
fcpu/2
0.57 ms
2.23us
62.5 ms
0.24 ms
The equation of TC1C initial value is as following.
TC1C initial value = 256 - (TC1 interrupt interval time * input clock)
Example: To set 10ms interval time for TC1 interrupt at 3.58MHz high-speed mode. TC1C value (74H) =
256 - (10ms * fcpu/64)
TC1C initial value = 256 - (TC1 interrupt interval time * input clock)
= 256 - (10ms * 3.58 * 106 / 4 / 64)
= 256 - (10-2 * 3.58 * 106 / 4 / 64)
= 116
= 74H



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