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AS8218 データシート(PDF) 97 Page - ams AG

部品番号 AS8218
部品情報  Highly Integrated Single Phase 2 Current Energy Metering Integrated Circuits
PDF  123 Pages
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メーカー  AMSCO [ams AG]
ホームページ  http://www.ams.com
Logo AMSCO - ams AG

AS8218 データシート(HTML) 97 Page - ams AG

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Data Sheet AS8218 / AS8228
Revision 3.0, 31-May-06
Page 97 of 123
T0PRE
CT_N = 0
CT_N = 1
TR0
TL0
(5 bits)
TH0
(8 bits)
TF0
Control
Timer 0
Interrupt
mcu_clk
(8bits) *)
1
6
1
N
mcu_clk
x
x
6
:
N
:
Figure 25: Timer 0 Mode 0 and Mode 1
*)
: 13 bit counter
T0PRE
CT_N = 0
CT_N = 1
TR0
TL0
(8 bits)
TF0
Control
Timer 0
Interrupt
mcu_clk
clk
_
mcu
6
1
TH0
(8 bits)
Reload
1
6
1
N
mcu_clk
xx
6
:
N
:
Figure 26: Timer 0 Mode 2: 8 bit counter
T0PRE
CT_N = 0
CT_N = 1
TR0
TL0
(8 bits)
TF0
Control
Timer 0
Interrupt
mcu_clk
clk
_
mcu
6
1
TR1
Control
TH0
(8 bits)
TF1
1
6
1
N
mcu_clk
x
x
6
:
N
:
Figure 27: Timer 0 Mode 3: two 8 bit counters
T0PRE
Unlike the standard 8051 there is a 8-bit prescaler register available for timer 0. Values of 0x00 (default after
reset) and 0x01 do not have any effect. For all other values the timer input frequency is divided according to
the value (ranging from 2 up to 255).



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