參數(shù)資料
型號(hào)： PTPS659104A1RSL
廠商： TEXAS INSTRUMENTS INC
元件分類： 電源管理
英文描述： POWER SUPPLY SUPPORT CKT, PQCC48
封裝： 6 X 6 MM, 1 MM HEIGHT, GREEN, PLASTIC,VQFN-48
文件頁(yè)數(shù)： 38/89頁(yè)
文件大?。?/td> 941K
代理商： PTPS659104A1RSL
PRODUCTPREVIEW
www.ti.com
SWCS046C – MARCH 2010 – REVISED JUNE 2010
Programming
EN1_LDO_ASS_REG,
EN2_LDO_REG,
and
SLEEP_KEEP_LDO_ON_REG
registers:
SCLSR_EN1 and SDASR_EN2 signals can be used to control the turn on/off or sleep state of any LDO type
supplies.
Programming
EN1_SMPS_ASS_REG,
EN2_SMPS_ASS_REG,
and
SLEEP_KEEP_RES_ON
registers:
SCLSR_EN1 and SDASR_EN2 signals can be used to control the turn on/off or low-power state (PFM mode) of
SMPS type supplies.
SDASR_EN2 and SCLSR_EN1 can be used to set output voltage of VDD1 and VDD2 SMPS from a roof to a
floor value, preprogrammed in the VDD1_OP_REG, VDD2_OP_REG, and teh VDD1_SR_REG, VDD2_SR_REG
registers. Tun-off of VDD1 and VDD2 can also be programmed either in VDD1_OP_REG, VDD2_OP_REG or in
VDD1_SR_REG, VDD2_SR_REG registers.
When a supply is controlled through SCLSR_EN1 or SCLSR_EN2 signals, its state is no longer driven by the
device SLEEP state.
GPIO_CKSYNC
GPIO_CKSYNC is a configurable open-drain digital I/O: directivity, debouncing delay and internal pullup can be
programmed in the GPIO0_REG register. GPIO_CKSYNC cannot be used to turn on the device, even if its
associated interrupt is not masked.
Programming DCDCCKEXT = 1, VDD1, VDD2, VIO, and VDD3 dc-dc switching can be synchronized using a
3-MHz clock set though the GPIO_CKSYNC pin.
DYNAMIC VOLTAGE FREQUENCY SCALING AND ADAPTIVE VOLTAGE SCALING OPERATION
Dynamic voltage frequency scaling (DVFS) operation: a supply voltage value corresponding to a targeted
frequency of the digital core supplied is programmed in VDD1_OP_REG or VDD2_OP_REG registers.
The slew rate of the voltage supply reaching a new VDD1_OP_REG or VDD2_OP_REG programmed value is
limited to 12.5 mV/s, fixed value. Adaptative voltage scaling (AVS) operation: a supply voltage value
corresponding to a supply voltage adjustment is programmed in VDD1_SR_REG or VDD2_SR_REG registers.
The supply voltage is then intended to be tuned by the digital core supplied, based its performance
self-evaluation. The slew rate of VDD1 or VDD2 voltage supply reaching a new programmed value is
programmable though the VDD1_REG or VDD2_REG register, respectively.
A serial control interface (SR-I2C) is dedicated to SmartReflex applications such as DVFS and class 3 AVS, and
thus gives access to the VDD1_OP_REG, VDD1_SR_REG, and VDD2_OP_REG, VDD2_SR_REG register.
A general-purpose serial control interface (CTL-I2C) also gives access to these registers, if SR_CTL_I2C_SEL
control bit is set to 1 in the DEVCTRL_REG register (default inactive).
Both control interfaces are compliant with HS-I2C specification (100 kbps, 400 kbps, or 3.4 Mbps).
Figure 12 shows an example of a SmartReflex operation. To optimize power efficiency, the voltage domains of
the host processor uses the DVFS and AVS features provided by SmartReflex.
Copyright 2010, Texas Instruments Incorporated
43
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