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參數(shù)資料
| 型號： | PD64012 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 12-channel PoE Manager |
| 中文描述： | 12通道供電管理 |
| 文件頁數(shù)： | 8/16頁 |
| 文件大?。?/td> | 496K |
| 代理商： | PD64012 |
PD64012
12-CHANNEL PoE MANAGER
Automatic mode – in this mode the PD64012 PoE
Managers communicate with the host CPU, through
an isolated I
2
C bus. The PD64012 SPI bus is
dedicated
for
internal
PD64012s (for power management), as illustrated in
Figure 4.
Anyone of the devices (for example, PD64012 #00)
may be configured as Master, while the others are
Slaves. This Master/Slave configuration only affects
the Serial Peripheral Interface (SPI) bus. It is critical
that only one of them be set-up as a Master, with the
others acting as Slaves, in order to avoid SPI clock
and data I/Os contentions.
communication
among
HOST
CPU
SDA
SCL
SDA
SCL
SDA
SCL
SDA
SCL
SDA
SCL
Input Opto
I/O Opto
I
2
C BUS
PD64012
#00
Master
PD64012
#01
PD64012
#10
PD64012
#11
Slave
Slave
Slave
SPI BUS
MOSI
MISO
MOSI
MISO
MOSI
MISO
MOSI
MISO
SCK
SCK
SCK
SCK
CS[0:1]_N
Figure 4: Automatic Mode
Mode Configuration Method
The PoE Manager’s configuration is done via the ASIC_INI pin, according to the following table.
The ASIC_INI analog signal is converted into a 10-bit register (A/D). Once a hard Reset pulse is detected, the data
is latched into an internal mode register.
MODE NAME
ASIC_INI
VOLTAGE LEVEL
ASIC_INI INTERNAL A/D
REGISTER
I
2
C 2 LSB ADDRESS
(set internally)
Enhanced mode
Auto mode – Slave 1
Auto mode – Slave 2
Auto mode – Slave 3
Auto mode - Master
0.31 to 0.63 V
0.63 to 0.94 V
0.94 to 1.25 V
1.25 to 1.56 V
2.19 to 2.5 V
001
010
011
100
111
00
01
10
11
00
Notes:
In the Auto mode – the PD64012 is communicating with the host via I
2
C.
In the Enhanced mode – the PD64012 is communicating with the controller via SPI.
Block Diagram Description
(see Figure 5)
The PD64002 PoE Manager complies with all requirements of IEEE standard 802.3af-2003, for detection. The
device has been designed around two major sections:
1. A common Digital section, that serves all 12 channels
2. Twelve separate and identical channels for driving ports.
www.powerdsine.com
06-0003-058 (Rev. 2.8) / 5 August 2004
PowerDsine 2003
Information in this document subject
to change without prior notice.
8
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