78Q2132 Datasheet, PDF (10/36 Pages) TDK Electronics – 1/10BASE-T HomePNA/Ethernet Transceiver

78Q2132
1/10BASE-TX
HomePNA/Ethernet Transceiver
MISCELLANEOUS PINS
NAME
GPIO0
80-PIN
19
GPIO1
20
INTR
43
64-PIN
N/A
N/A
35
TYPE
I/O
I/O
OZ
DESCRIPTION
GENERAL PURPOSE I/O PIN: This is an I/O pin that is
configurable as an input or an output via management interface.
A value of one in bit MR16.6 configures GPIO0 as an input, and
a zero configures it as an output. The logic level of the GPIO0
pin is reflected in MR16.7. This pin has a weak internal pull-
down to prevent it from floating when configured as an input (it
is configured as an input by default).
GENERAL PURPOSE I/O PIN: This is an I/O pin, which is
configurable as an input or an output via the management
interface. A value of one in bit MR16.8 configures GPIO1 as an
input, and a zero configures it as an output. The logic level of
the GPIO1 pin is reflected in MR16.9. This pin has a weak
internal pull-down to prevent it from floating when configured as
an input (it is configured as an input by default).
INTERRUPT PIN: This pin is used to signal an interrupt to the
media access controller. The pin is held in the high impedance
state when an interrupt is not indicated. The pin will be forced
high or low to signal an interrupt depending upon the value of
the INTR_LEVEL bit (MR16.14). The events that trigger an
interrupt can be programmed via the Interrupt Control Register
located at address MR17 and P1R3 for HomeLAN.
POWER SUPPLY
NAME
V_CC
GND
80-PIN
8,13,
27,36,
45,51,
60, 79
4,11,
12,28,
35,44,
46,52,
59,77
64-PIN
6,11,
37,48,
63
2,9,10,
36,38,
47,61
TYPE
S
S
DESCRIPTION
SUPPLY VOLTAGE: Two supply ranges are supported: 5V ±
0.5V, or 3.3V ± 0.3V.
GROUND
REFERENCE PIN
RIBB
70
RIBB_RET
69
VBG
71
58
A BIAS CURRENT SETTING RESISTOR: To be tied to an
external resistor that is also connected to the RIBB_RET pin.
This resistor should be placed as close as possible to the
package pin. A recommended value of 9.76 KΩ ± 1% is
provided for reference purposes only.
57
A BIAS CURRENT SETTING RESISTOR RETURN PIN: To be
connected to external RIBB resistor.
59
A
V BANDGAP BYPASS: Pin for tying bypass cap ~ 0.1uF.
10