PC87782 datasheet(10/17 Pages) NSC

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OSCOUT

Oscillator Output [not characterized]

Analog in

A/D Analog Input signal

Analog out

D/A Analog output signal

Analog I/O

A/D Analog input/output signal

Analog FB

A/D Op-Amp Feedback

MII In

VIH VIL (TTL)

VTRH VTRL

Ethernet IEEE 802.3u compliant input

MII Out

VOHm VOLm

Ethernet IEEE 802.3u compliant output

Table 3 Input Pins

Signal

Type

Pin Number

No. of

Sig Pins

Function

100-pin

160-pin

32KCLKIN

TTL

32.768 KHz Oscillator Clock Input.

AMP(1,0)

Analog In

Analog Inputs to Op-Amps

ENV(1,0)

STRAP

Environment select strap pins. These pins deﬁne the

device environment. They are sampled on all resets

except HMR. ENV2 is permanently high in the 100-pin

package.

ENV2

STRAP

N/A

TTL

Host Address line used in conjunction with the chip-

select inputs to address registers on the Host Interface.

HIOR

TTL

Host I/O Read. Active-low input that signals an I/O data

read by the host processor.

HIOW

TTL

Host I/O Write. Active-low input that signals an I/O data

write by the host processor.

HCSA

TTL

Host Chip Select A. Active-low input that indicates an

access to Channel A by the host processor.

HCSB

TTL

Host Chip Select B. Active-low input that indicates an

access to Channel B by the host processor.

HMR

Schmitt

Host Master Reset

HPWRON

Schmitt

Host Power On. Indicates that the host power supply is

on, and the host bus interface signals are valid. While

HPWRON is low, the host inputs are ignored, and all

outputs ﬂoat.

NANDEN

Schmitt

NAND Test Mode / ISE TRI-STATE Mode

PFAIL

Schmitt

Power Fail Detected Input

RESET

Schmitt

Master Reset. A low level resets the controller and

inhibits HFCG frequency locking.

RXD0-3

MII In

MII Input data.

RX_CLK

MII In

MII Receive Clock

RX_DV

MII In

MII Receive Data Valid

RX_ER

MII In

MII Receive Error

COL

MII In

MII Collision Detect

CRS

MII In

MII Carrier Sense

TX_CLK

MII In

Transmit Clock Input

ISE

Schmitt

N/A

ISE Interrupt. reserved for use by the development

system.

Table 2 Pin Descriptions

Signal Type

Input

Parameters

Output

Parameters

Buffer Description

PC87782 Datasheet(PDF) 10 Page - National Semiconductor (TI)

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