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型号： ADE5566ASTZF62-RL
厂商： Analog Devices Inc
文件页数： 118/156页
文件大小： 0K
描述： IC ENERGY METERING 1PHASE 64LQFP
产品变化通告： Product Discontinuance 27/Oct/2011
标准包装： 1,500
输入阻抗： 770 千欧
测量误差： 0.1%
电压 - 高输入/输出： 2V
电压 - 低输入/输出： 0.8V
电源电压： 2.4 V ~ 3.7 V
测量仪表类型： 单相
工作温度： -40°C ~ 85°C
安装类型： 表面贴装
封装/外壳： 64-LQFP
供应商设备封装： 64-LQFP（10x10）
包装： 带卷 (TR)
ADE5166/ADE5169/ADE5566/ADE5569
Mode 2 (8-Bit Timer/Counter with Autoreload)
Mode 2 configures the timer SFR (TH0, Address 0x8C) as an 8-bit
counter (TL0, Address 0x8A) with automatic reload, as shown in
Figure 100. Overflow from TL0 not only sets TF0 (Address
0x88[5]) but also reloads TL0 with the contents of TH0, which is
preset by software. The reload leaves TH0 unchanged.
Data Sheet
TIMER 2
Timer/Counter 2 Data Registers
Timer/Counter 2 also has two pairs of 8-bit data registers asso-
ciated with it: Timer 2 high byte SFR (TH2, Address 0xCD),
Timer 2 low byte SFR (TL2, Address 0xCC), Timer 2 reload/
capture high byte SFR (RCAP2H, Address 0xCB), and Timer 2
f CORE
P0.6/T0
TR0
C/T0 = 0
C/T0 = 1
TL0
(8 BITS)
CONTROL
TF0
INTERRUPT
reload/capture low byte SFR (RCAP2L, Address 0xCA). These
SFRs are used both as timer data registers and as timer capture/
reload registers (see Table 120 to Table 123).
Timer/Counter 2 Operating Modes
The following sections describe the operating modes for Timer/
Counter 2. The operating modes are selected by bits in the Timer/
Counter 2 control SFR (T2CON, Address 0xC8), as shown in
GATE
INT0
RELOAD
TH0
(8 BITS)
Figure 100. Timer/Counter 0, Mode 2
Table 115 and Table 124.
Table 124. T2CON O perating Modes
RCLK or TCLK CAP2 TR2
Mode
Mode 3 (Two 8-Bit Timer/Counters)
Mode 3 has different effects on Timer 0 and Timer 1. Timer 1 in
Mode 3 simply holds its count. The effect is the same as setting
TR1 = 0. Timer 0 in Mode 3 establishes TL0 and TH0 as two
0
0
1
X
0
1
X
X
1
1
1
0
16-bit autoreload
16-bit capture
Baud rate
Off
separate counters. This configuration is shown in Figure 101.
TL0 uses the Timer 0 control bits, C/T0 , Gate0 (see Table 113),
TR0, TF0 (see Table 114), and the INT0 pin. TH0 is locked into
a timer function (counting machine cycles) and takes over the
use of TR1 and TF1 from Timer 1. Therefore, TH0 controls the
Timer 1 interrupt. Mode 3 is provided for applications requiring
an extra 8-bit timer or counter.
When Timer 0 is in Mode 3, Timer 1 can be turned on and off
by switching it out of and into its own Mode 3, or it can be used
by the serial interface as a baud rate generator. In fact, Timer 1
can be used in any application not requiring an interrupt from
Timer 1 itself.
16-Bit Autoreload Mode
The 16-bit autoreload mode has two options that are selected by
EXEN2 (Bit 3) in the Timer/Counter 2 control SFR (T2CON,
Address 0xC8). If EXEN2 = 0 when Timer 2 rolls over, it not only
sets TF2 but also causes the Timer 2 SFRs to be reloaded with the
16-bit value in both the Timer 2 reload/capture high byte SFR
(RCAP2H, Address 0xCB) and Timer 2 reload/capture low byte
SFR (RCAP2L, Address 0xCA), which are preset by software. If
EXEN2 = 1, Timer 2 performs the same events as when EXEN2 = 0
but adds a 1-to-0 transition at the external input pin, T2EX, which
triggers the 16-bit reload and sets EXF2 (T2CON[6]). Autoreload
mode is shown in Figure 102.
f CORE
CORE
CLK/12
16-Bit Capture Mode
C/T0 = 0
TL0
(8 BITS)
TF0
INTERRUPT
The 16-bit capture mode has two options that are selected by
EXEN2 (Bit 3) in the Timer/Counter 2 control SFR (T2CON,
P0.6/T0
C/T0 = 1
Address 0xC8). If EXEN2 = 0, Timer 2 is a 16-bit timer or counter
that, upon overflowing, sets the Timer 2 overflow bit (TF2, Bit 7).
GATE
INT 0
TR0
CONTROL
This bit can be used to generate an interrupt. If EXEN2 = 1, then
Timer 2 performs the same events as when EXEN2 = 0, but it
adds a l-to-0 transition on the T2EX external input, causing the
current value in the Timer 2 SFRs, TL2 (Address 0xCC) and TH2
(Address 0xCD) to be captured into the RCAP2L (Address 0xCA)
and RCAP2H (Address 0xCB) SFRs, respectively. In addition, the
f CORE /12
TH0
(8 BITS)
TF1
INTERRUPT
transition at T2EX causes the EXF2 bit (Bit 6) in the T2CON SFR
(Address 0xC8) to be set, and EXF2, like TF2, can generate an
TR1
Figure 101. Timer/Counter 0, Mode 3
interrupt. Capture mode is shown in Figure 103. The baud rate
generator mode is selected by RCLK = 1 and/or TCLK = 1.
Rev. D | Page 118 of 156
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