參數(shù)資料
型號(hào)： TMDS461PZT
廠商： TEXAS INSTRUMENTS INC
元件分類： 消費(fèi)家電
英文描述： SPECIALTY CONSUMER CIRCUIT, PQFP100
封裝： PLASTIC, TQFP-100
文件頁(yè)數(shù)： 5/43頁(yè)
文件大?。?/td> 3111K
代理商： TMDS461PZT
S1
S2
5 V
HPD_SINK
HPD[3]
5 V_PWR3
PORT3 isnonselected
port
PORT3 isselectedport
PORT3 isnonselected
port
tS1(HPD)
tpd1( HPD)
tS2(HPD)
2.5V
(5V_PWR3)/2
5 V
2.5V
(5V_PWR3)/2
IRQ
ELECTRICAL CHARACTERISTICS
www.ti.com ............................................................................................................................................................................................... SLLS915 – JANUARY 2009
Figure 3. HPD Timing Diagram #2
I2C mode: When TMDS461 is configured in I2C mode, the IRQ pin in TMDS461 functions as a system level
interrupt indicator pin. The TMDS461 issues Interrupt Requests by raising the IRQ pin from low to high, which
can be detected by the sink micro-controller. An Interrupt Request occurs when any system level change is
detected by TMDS461, which is a change in 5V_PWR on the source side, a change in the selected port, or a
change in the selected port's valid clock detect. The micro-controller can read I2C register address 0x01 to obtain
the current status of 5V_PWR, the selected port, and clock detect status. Once the micro-controller has read
0x01, the IRQ pin returns to low.
It is desired that as soon as the sink micro-controller gets an Interrupt Request, it reads I2C register address
GPIO mode: When TMDS461 is configured in GPIO mode, the IRQ pin in TMDS461 functions as a clock-detect
indicator pin for the selected port. If a valid clock is detected by the clock detect circuit, IRQ goes high. If no valid
clock is detected, IRQ is driven low. Refer to (TMDS Main Link Switching Characteristics) tCLK1 for valid clock
enable time and (TMDS Main Link Switching Characteristics) tCLK2 for valid clock disable time.
over recommended operating conditions (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VOH(IRQ)
High-level output voltage
IOH = 100 A
2.4
VCC
V
VOL(IRQ)
Low-level output voltage
IOL = 100 A
0
0.4
V
RL(IRQ)
Output source impedance
800
1000
1200
k
Copyright 2009, Texas Instruments Incorporated
13
Product Folder Link(s) :TMDS461
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