ADSP-BF522/523/524/525/526/527
Preliminary Technical Data
Table 10. Signal Descriptions (Continued)
Signal Name
Type Function
Driver
Type1
Power Supplies
ALL SUPPLIES MUST BE POWERED
See Operating Conditions for ADSP-BF523/525/527 on Page 29,
and see Operating Conditions for ADSP-BF522/524/526 on Page 27.
VDDEXT
VDDINT
VDDRTC
VDDUSB
VDDMEM
VDDOTP
VPPOTP
VSS
P I/O Power Supply
P Internal Power Supply
P Real Time Clock Power Supply
P 3.3 V USB Phy Power Supply
P MEM Power Supply
P OTP Power Supply
P OTP Programming Voltage
G Ground for All Supplies
1 See Output Drive Currents on Page 64 for more information about each driver type.
2 HWAIT must be pulled high or low to configure polarity. It is driven as an output and toggle during processor boot. See Booting Modes on Page 18.
3 When driven low, this ball can be used to wake up the processor from the hibernate state, either in normal GPIO mode or in Ethernet mode as MII PHYINT. If the ball is used
for wake up, enable the feature with the PHYWE bit in the VR_CTL register, and pull-up the ball with a resistor.
4 Consult version 2.1 of the I2C specification for the proper resistor value.
Rev. PrG | Page 26 of 80 | February 2009