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| 型号： | EVAL-ADE5169EBZ-2 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 149/156页 |
| 文件大小： | 0K |
| 描述： | BOARD EVALUATION FOR AD5169 |
| 标准包装： | 1 |
| 主要目的： | 电源管理，电度表/功率表 |
| 嵌入式： | 是 |
| 已用 IC / 零件： | ADE5169 |
| 主要属性： | 用于汇编语言和 C 代码的 IAR 工具 |
| 次要属性： | 隔离和非隔离输出选项 |
| 已供物品： | 板，软件 |
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Data Sheet
I/O PORTS
PARALLEL I/O
The ADE5166/ADE5169/ADE5566/ADE5569 use three input/
output ports to exchange data with external devices. In addition
to performing general-purpose I/O, some ports are capable of
driving an LCD or performing alternate functions for the periph-
erals available on chip. In general, when a peripheral is enabled, the
pins associated with it cannot be used as general-purpose I/Os. The
I/O port can be configured through the SFRs listed in Table 160.
Table 160. I/O Port SFRs
SFR Address Bit Addressable Description
P0 0x80 Yes Port 0
P1 0x90 Yes Port 1
P2 0xA0 Yes Port 2
EPCFG 0x9F No Extended port
configuration
ADE5166/ADE5169/ADE5566/ADE5569
Weak Internal Pull-Ups Enabled
A pin with weak internal pull-up enabled is used as an input by
writing a 1 to the pin. The pin is pulled high by the internal pull-
up, and the pin is read using the circuitry shown in Figure 118.
If the pin is driven low externally, it sources current because of
the internal pull-up.
A pin with internal pull-up enabled is used as an output by writing
a 1 or a 0 to the pin to control the level of the output. If a 0 is
written to the pin, it drives a logic low output voltage (V OL ) and
is capable of sinking 1.6 mA.
Open Drain (Weak Internal Pull-Ups Disabled)
When the weak internal pull-up on a pin is disabled, the pin
becomes open drain. Use this open-drain pin as a high impedance
input by writing a 1 to the pin. The pin is read using the circuitry
shown in Figure 118. The open-drain option is preferable for
PINMAP0
PINMAP1
PINMAP2
0xB2
0xB3
0xB4
No
No
No
Port 0 weak
pull-up enable
Port 1 weak
pull-up enable
Port 2 weak
pull-up enable
inputs because it draws less current than the internal pull-ups
that were enabled.
38 kHz Modulation
Each ADE5166/ADE5169/ADE5566/ADE5569 provides a 38 kHz
modulation signal. The 38 kHz modulation is accomplished by
The three bidirectional I/O ports have internal pull-ups that can
be enabled or disabled individually for each pin. The internal
pull-ups are enabled by default. Disabling an internal pull-up
causes a pin to become open drain. Weak internal pull-ups are
configured through the PINMAPx SFRs.
Figure 118 shows a typical bit latch and I/O buffer for an I/O pin.
The bit latch (one bit in the SFR of each port) is represented as a
Type D flip-flop, which clocks in a value from the internal bus
in response to a write-to-latch signal from the CPU. The Q out-
put of the flip-flop is placed on the internal bus in response to a
read latch signal from the CPU. The level of the port pin itself is
placed on the internal bus in response to a read pin signal from
the CPU. Some instructions that read a port activate the read
latch signal, and others activate the read pin signal. See the
Read-Modify-Write Instructions section for details.
DV DD
INTERNAL
internally XOR’ing the level written to the I/O pin with a 38 kHz
square wave. Then, when a 0 is written to the I/O pin, it is
modulated as shown in Figure 119.
LEVEL WRITTEN
TO MOD38
38kHz MODULATION
SIGNAL
38kHz MODULATED
OUTPUT PIN
Figure 119. 38 kHz Modulation
Uses for this 38 kHz modulation include IR modulation of
a UART transmit signal or a low power signal to drive an LED.
The modulation can be enabled or disabled with the MOD38EN
bit in the configuration SFR (CFG, Address 0xAF[4]). The 38 kHz
modulation is available on eight pins, which are selected by the
MOD38 bits in the extended port configuration SFR (EPCFG,
Address 0x9F[7:0]).
ALTERNATE
PULL-UP
READ
LATCH
OUTPUT
FUNCTION
CLOSED: PINMAPx.x = 0
OPEN: PINMAPx.x = 1
Px.x
INTERNAL
BUS
D
Q
PIN
WRITE
TO LATCH
CL Q
LATCH
READ
PIN
ALTERNATE
INPUT
FUNCTION
Figure 118. Port 0 Bit Latch and I/O Buffer
Rev. D | Page 149 of 156
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| EVAL-ADE5169F62EBZ | 制造商:Analog Devices 功能描述:EVALUATION BOARD FOR ADE5169 - Boxed Product (Development Kits) 制造商:Rochester Electronics LLC 功能描述: |
| EVAL-ADE5569F62EBZ | 制造商:AD 制造商全称:Analog Devices 功能描述:Single-Phase Energy Measurement IC with 8052 MCU, RTC, and LCD Driver |
| EVAL-ADE7169EBZ-2 | 功能描述:BOARD EVALUATION FOR ADE7169F16 RoHS:是 类别:编程器，开发系统 >> 评估演示板和套件 系列:- 标准包装:1 系列:PCI Express® (PCIe) 主要目的:接口，收发器，PCI Express 嵌入式:- 已用 IC / 零件:DS80PCI800 主要属性:- 次要属性:- 已供物品:板 |
| EVAL-ADE7169F16EB | 制造商:AD 制造商全称:Analog Devices 功能描述:Single-Phase Energy Measurement IC with 8052 MCU, RTC and LCD driver |
| EVAL-ADE7169F16EBZ | 制造商:Analog Devices 功能描述:Evaluation Board For ADE7169 制造商:Analog Devices 功能描述:EVAL BD FOR ADE7169 - Bulk |
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