參數(shù)資料
型號(hào): TPS23841_07
廠商: Texas Instruments, Inc.
英文描述: HIGH-POWER, WIDE VOLTAGE RANGE, QUAD-PORT ETHERNET POWER SOURCING EQUIPMENT MANAGER
中文描述: 大功率,寬電壓范圍,四端口以太網(wǎng)供電設(shè)備管理器
文件頁數(shù): 31/52頁
文件大?。?/td> 1011K
代理商: TPS23841_07
www.ti.com
Data Read Cycles
TPS23841
SLUS745–NOVEMBER 2006
For a data read sequence, after the register acknowledge bit, the master device generates a stop condition. This
is followed by a second start condition, and re-transmitting the device address as described in chip address
above. For this cycle, however, the R/W bit is set to a 1 to signal the read operation. The TPS23841 again
responds with an acknowledge pulse. The address acknowledge is then followed by sequentially presenting
each of the eight data bits on the SDA_O line (MSB first), to be read by the host device on the rising edges of
SCL. After eight bits are transmitted, the host acknowledges by pulling the SDA_I line high for one clock pulse.
The completed data transfer is terminated with the host generating a stop condition.
Table 2. Register/Port Addressing Map
BIT
FUNCTION
STATE
PRESET
STATE
0
D7
D6
D5
D4
Unused
Register select MSB
Register select Bit 2
Register select Bit 1
0
0000 = Common Read - Port fault status, chip ID and rev.
0001 = Common Control Write - Software reset, ports disable and AC Disc.
0010 = Port Control Write 1 - Function calls; misc. fault disables
0011 = Port Control Write 2 - Port enable; A/D control
0100 = Port Status Read 1 - Fault status; device Class info.
0101 = Port Status Read 2 - Function and other status
0110 = Discovery Current - Lower Bits - A/D resistance results
0111 = Discovery Current - Upper Bits - A/D resistance results
1000 = Voltage-Lower Bits - A/D voltage reslts
1001 = Voltage - Upper Bits - A/D voltage results
1010 = Current - Lower Bits - A/D current results
1011 = Current - Upper Bits - A/D current results
1100 = Temperature - Lower Bits - A/D temperature results
1101 = Temperature - Upper Bits - A/D temperature results
1110 = unused
1111 = Common Write - Test mode selections - timer disables, discovery control, etc.
0
00 = port 1
01 = port 2
10 = port 3
11 = port 4
0000
D3
Register select LSB
D2
D1
D0
Unused
Port address MSB
Port address LSB
0
00
31
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