Datasheet

Signal Description
Intel
®
Atom™ Processor E6xx Series Datasheet
43
2.14 Power and Ground Signals
This section provides power and ground signals for the Intel
®
Atom™ Processor E6xx Series.
GPIO[0]
STRAP_BOOT_FLASH: Defines whether TC boots from SPI or LPC
1: SPI
0: LPC
Notes: Boot from LPC is not supported.
GPIO[3:2]
STRAP_CMC_BA[1:0] = GPIO[3:2]. CMC Base Address, defined the address the
CMC will start fetching and executing code from
10 = 0xFFFE0000
11 = 0xFFFD0000
01 = 0xFFFC0000
00 = 0xFFFB0000
GPIO[4]
STRAP_LPCCLK_STRENGTH: LPC_CLKOUT[0] Buffer Strength Control.
Select the drive strength of the LPC_CLKOUT[0] clock
0 = 1 load driver strength
1 = 2 load driver strength
Table 18. Power and Ground Signals (Sheet 1 of 2)
Signal
Name
Nominal Voltage Description
VCC 0.75 - 1.15 V
Processor Core Supply Voltage. Power supply is required for processor
cycles.
VNN 0.75 - 0.9875 V North Cluster Logic and Graphics Supply Voltage
VCCP 1.05 V Needed for most bus accesses
VCCF 1.05 V Can be connected to VCCP
VCCPQ 1.05 V Can be connected to VCCP
VCCPDDR 1.05 V
DDR DLL and logic Supply Voltage. Required for memory bus accesses.
Requires a separate rail with noise isolation.
VCCPA 1.05 V
JTAG, C6 SRAM, Fuse Supply Voltage. Needs to be on in Active or
Standby. This rail is connected to the VCCP rail.
VCCQ 1.05 V Connect to 1.05 V
LVD_VBG 1.25 V LVDS Band Gap Supply Voltage. Needed for LVDS display
VCCA 1.5 V Core PLL, core thermal sensor and sensor
VCCA180 1.8 V
LVDS Analog Supply Voltage. Needed for LVDS display. Requires a
separate rail with noise isolation.
VCCD180 1.8 V LVDS I/O Supply Voltage. Needed for LVDS display.
VCC180SR AON
DDR2 Self Refresh Supply Voltage. Powered during Active,
Standby, and Self-Refresh states.
VCC180 1.8 V
DDR2 I/O Supply Voltage. Required for memory bus accesses. Cannot be
connected to VCC180SR during Standby or Self- Refresh states.
VCCD 1.05 V Core supply voltage
VCCDSUS 1.05 V Core suspend rail
VCCP33 3.3 V Legacy I/O and SDVO supply voltage
VCCP33SUS 3.3 V 3.3 V suspend power supply
VCCPSUS 3.3 V RTC suspend well voltage supply
VCC33RTC 3.3 V RTC well voltage supply
Table 17. Functional Straps (Sheet 2 of 2)
Signal Name Strap Definition