Broadcom BCM5221 - INTERNAL PULL-UPS AND PULL-DOWNS

Product Application Note ■ BCM5221
7/7/00 ■ BCM5220
Broadcom Corporation
5221/5220-AN01 Product Application Note, Revision R Page 2
Figure 1: Power Supply Configuration Options
INTERNAL PULL-UPS AND PULL-DOWNS
• This section lists those Inputs, or combination Inputs/Outputs, that include internal resistive pull-ups or pull-downs. The
value of each pull-up and pull-down is approximately 50 kΩ (+/-20%).
• REF_CLK > pull-down
• TXD[3:0] > pull-down
• TXEN > pull-down
• TXER > pull-down
• MDC > pull-down
• PHYAD[4:0] > pull-down
• FDX > pull-down
• SD+ > pull-down
• SD- > pull-down
OVDD
DVDD
REGDVDD
AVDD AVDD
BIASVDD REGAVDD
DVDD
2.5V
2.5V
N/C
N/C
2.5V
BCM5221
(2.5V Supply Connection)
OVDD
DVDD
REGDVDD
AVDD AVDD
BIASVDD REGAVDD
DVDD
N/C3.3V
BCM5221
(3.3V Supply Connection)
N/C
(BIASVDD connects to AVDD, however,
none of these pins connects to 3.3V)
OVDD
DVDD
REGDVDD
AVDD AVDD
BIASVDD REGAVDD
DVDD
2.5V
2.5V
N/C
N/C
2.5V
BCM5221
(2.5V Core, 3.3V I/O))
3.3V