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參數資料
| 型號： | TPS65820RSHTG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | 8-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC56 |
| 封裝： | 7 X 7 MM, GREEN, PLASTIC, QFN-56 |
| 文件頁數： | 22/98頁 |
| 文件大小： | 2290K |
| 代理商： | TPS65820RSHTG4 |
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Valid Read Sequences
Non-Valid Sequences
www.ti.com .............................................................................................................................................................. SLVS663B – MAY 2006 – REVISED APRIL 2008
The TPS65820 always ACKs its own address.
S
hA1
bqA
Upon receiving hA1, TPS65820 starts at wherever the RAM address register is pointing. The START and the
STOP both act as priority interrupts. If the host has been interrupted and is not sure where it left off it can send a
STOP and reset the TPS65820 state machine to the WAIT state; once in WAIT state TPS65820 ignores all
activity on the SCL and SDA lines until it receives a START. A repeated START and START in the I2C
specification are both treated as a START.
S
hA0
bqA
hCMD
bqA
P
S
hA0
bqA
hCMD
bqA
S
hA1
bqA
bqDATA
hN
P
S
hA1
bqA
bqDATA
hN
P
Incremental read sequences
S
hA1
bqA
bqDATA
hA
bqDATA
hA
bqDATA
hA
bqDATA
hA
...
bqDATA
hA
P
START and non-hA0 or non-hA1 Address
A START followed by an address which is not bqA0 or bqA1 is NACKED
S
hA_N
bqN
Attempt to Specify Non-Allowed READ Address
If the CMD points to a non-allowed READ address (reserved registers), bq sends a NACK back to the host and it
does not load the address in the RAM address register. Note that TPS65820 NACKS whether a stop is sent or
not.
S
hA0
bqA
hCMD_N
bqN
P
S
hA0
bqA
hCMD_N
bqN
Attempt to Specify Non-Allowed WRITE Address
If the host attempts to WRITE to a READ-ONLY or non-accessible address TPS65820 ACKS the CMD
containing the allowed READ address, loads the address into the address register and NACKS after the host
sends the next data byte. After issuing the NACK TPS65820 returns to WAIT state. A subsequent hA1 READ
could read this address.
S
hA0
bqA
hCMD
bqA
hDATA
bN
Copyright 2006–2008, Texas Instruments Incorporated
29
Product Folder Link(s): TPS65820
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