STA2065 datasheet(17/20 Pages) STMICROELECTRONICS

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STA2065

System features introduction

Doc ID16050 Rev 1

17/20

3.6

IO groups

Vddio is split into the following groups:

●

Vddio_on

(a)

●

Vddiox (This is split into 5 types: VddioA, VddioB, VddioC, VddioD, VddioE)

(b)

●

VUSB (USB 2.0 PHY transceiver)

The IO supply type and corresponding pads details are as follows:

●

Vddio_on: Power Supply pins for the IO buffers of the always ON section. It supplies

POR, PWREN, VDDOK, BATOK, WAKE, SXTALI, SXTALO, OSC32KOUT

●

VddioA: Power Supply pins for the IO buffers. It supplies most GPIOs and dedicated

pads for JTAG, MMC0 and GPS

●

VddioB : Power Supply pins for the IO buffers. Supplies to the CLCD IOs

●

VddioC: Power Supply pins for the IO buffers. Supplies the SDMC IOs

●

VddioD: Power Supply pins for the IO buffers. Supplies the following IOs: FSMC,

GPIO64:67, GPIO96:127 and dedicated pads for TEST (SCANEN, TAPSEL)

●

VddioE: Power Supply pins for the IO buffers. Supplies the following IOs: CAN, MSP,

GPIOs related to SDMMC functionality

●

VUSB: 3.3V USB PAD power supply

●

VTSC: 3.3V Touchscreen PAD power supply.

Vddio_on is always 1.8V.

When Vddio domain A is powered with 2.5V (its PSW bit = 1), all other Vddio domains (B, D, E) should be

powered with same voltage level i.e 2.5V. Vddio domain C and Vddio_coreon is always powered with 1.8V. The

vice-versa is not true. So for example, application can power voltage bank B with 2.5V (keeping its PSW=1)

and VddioA as 1.8V. The corresponding mode is defined by PSW bits (20:16) of PMU Control register 2

(PMU_CR2) on page 263.

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