PPC34C60 datasheet(47/58 Pages) SMSC

47 / 58 page

SMSC DS – PPC34C60

Page 47

Rev. 06/01/2001

ADVANCED INFORMATION

FIGURE 18 - ECP FORWARD COMMAND TRANSFER TIMING

(ECP ADDRESS WRITE, PARALLEL PORT SIGNALS)

See ECP Forward Command Transfer Timing Parameters.

ECP FORWARD COMMAND TRANSFER TIMING

(ECP ADDRESS WRITE, PARALLEL PORT SIGNALS)

PARAMETER

MIN

TYP

MAX

UNITS

The Host places data on HD[0:7] and at the

same time asserts nALF to indicate that

this is a Command transfer.

(the

PPC34C60 supports Address commands,

not RLE commands)

After placing data on HD[0:7] and asserting

nALF, the host is required to meet this

setup

time

before

asserting

nSTB.

Assetion of nSTB informs the PPC34C60

that valid data is on HD[0:7] and that nALF

is valid.

The peripheral acknowledges by asserting

BSY.

334

[8 SCLK]

Once

the

peripheral

has

sent

its

acknowledgement the Host deasserts

nSTB to continue the handshake.

The

PPC34C60 latches the address data on

this rising edge of nSTB.

[SCLK]

As soon as the PPC34C60 has accepted

the data and is ready to accept another

byte it deasserts the BSY signal.

334

[8 SCLK]

Once the PPC34C60 has indicated it is

ready to receive another byte of data from

the Host, the Host if and when ready will

place another byte on HD[0:7]. This time is

the time required between the deassertion

of BSY and new valid data on HD[0:7].

[SCLK]

VALID ADDRESS

HD[0:7]

nSTB H

nALF H

nSEL H

nINIT H

BSY P

nACK P

PE P

SLCT P

nERR P

PPC34C60 数据表(PDF) 47 Page - SMSC Corporation

PPC34C60 数据表(HTML) 47 Page - SMSC Corporation

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58

数据表下载