BCM5208KPF Broadcom, BCM5208KPF Datasheet - Page 17

• Manufacturer Part Number: BCM5208KPF
• Manufacturer: Broadcom

Specifications of BCM5208KPF

• Number Of Receivers: 4
• Data Rate: 10/100Mbps
• Operating Temperature Classification: Commercial
• Operating Supply Voltage (min): 3.14V
• Mounting: Surface Mount
• Operating Temperature (max): 70C
• Operating Temperature (min): 0C
• Lead Free Status / RoHS Status: Not Compliant

November 3, 1999
Document 5208-DS03-R¥¥¥¥¥
PIN
41
52
42
104
105
58, 57, 56,
55
116, 115
43
54, 53
BIAS
78
79
LED
203, 184,
178, 159
Note: # = active low, I = digital input, O = digital output, I/O = bidirectional, I
digital input w/ internal pull-up, I
I/O
by {Port #}.
PD
= bidirectional w/ internal pull-down, B = Bias. Bus Naming Convention: pin label followed by [MSB:LSB] followed
PIN LABEL
RPTR
SER10
FDXEN/CIMEN
F100
ANEN
TXJAM {1:4}
ER[1:0]
TESTEN
NANDMD[1:0]
RDAC
VREF
LNKLED# {1:4}
Ser SFRM# {2}
PD
TYPE
I
I
I
I
I
I
I
I
I
B
B
O
PD
PD
PD
PU
PU
PD
PU
PD
PD
= digital input w/ internal pull-down, O
Table 4: Pin Descriptions(Continued)
DESCRIPTION
Repeater Mode Select. Active high input places all four PHY’s into repeater
mode; selects DTE mode when low.
Serial 10BASE-T Repeater Mode. For any PHY operating at 10 Mbps in
repeater mode (RPTR = 1), selects serial repeater mode when high, selects MII
repeater mode when low. ORed with Register 1E(hex) bit 1.
Full-Duplex Mode Enable. This pin’s function applies only to DTE mode when
Auto-Negotiation is disabled. The FDXEN pin is logically OR’ed with the MII
Control register bit 8 to generate an internal full-duplex enable signal. When
Auto-Negotiation is enabled, the FDXEN is ignored.
Carrier Integrity Monitor Enable. In repeater mode, CIMEN enables the CIM
function. When low, the CIM function will be disabled. In either case, the CIM
function may be enabled or disabled under software control (Register 10h, bit
12).
Force 100BASE-X Operation. When F100 is high and ANEN is low, all
transceivers will be forced to 100BASE-X operation. When F100 is low and
ANEN is low, all transceivers are forced to 10BASE-T operation. When ANEN is
high, F100 has no effect on operation.
Auto-Negotiation Enable. When pulled high, Auto-Negotiation begins
immediately after reset. When low, Auto-Negotiation is disabled after reset. Auto-
Negotiation is always under software control (Register “0”, bit 12).
Transmit JAM. Active high; valid during repeater mode only. When asserted
during transmission (TXEN active), forces PHY to ignore transmit data inputs
(TXD[3:0]) and transmit a jam pattern instead. Equivalent data value of jam
pattern is 5h.
Transmit DAC Edge Rate Control. These pins control the slew rate of each of
the transmit DACs. The 10-90% rise time is set by the value on ER[1:0] as
follows: “00” = 1 ns; “01” = 2 ns; “10” = 3 ns; “11” = 4 ns.
Test Enable. Active-high test control input used along with NANDMD[1:0] and
PHYA[4:2] to select the NAND-chain test mode. This test mode is latched when
TESTEN is pulsed high then low, with PHYA[4:2]=101 and NANDMD[1:0] = 11.
This pin is not included in the NAND chain and must be pulled low or left
unconnected during normal operation.
NAND Mode. Active-high test control inputs used along with TESTEN and
PHYA[4:2] to select the NAND-chain test mode. Both inputs must be driven high
during latching of the test-mode. Must be pulled low or left unconnected during
normal operation.
DAC Bias Resistor. Adjusts the current level of each of the transmit DACs. A
resistor of 1.24 KΩ ±1% must be connected between the RDAC pin and AGND.
Voltage Reference. Low-impedance bias pin driven by the internal band-gap
voltage reference. This pin must be left unconnected during normal operation.
Link Integrity LED. Active low. This output signal indicates the link status of the
PHY. LNKLED is driven low when the link to the PHY is good. In repeater mode,
this pin may be connected directly to the repeater controller. When the Serial
LED mode is enabled, pin 184 becomes the Serial LED mode frame signal.
B r o a d c o m C o r p o r a t i o n
OD
= open-drain output, O
A
= analog input, O
A
= analog output, I
3S
= three-state output,
n BCM5208
PU
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