Rainbow-electronics AT88SA100S Manuel d'utilisateur télécharger pdf (Page 6)

6 AT88SA100S [Preliminary]

8558A–SMEM–03/09

Table 3. AC Parameters

Parameter Symbol Direction Min Typ Max Unit Notes

Wake Low

Duration

WLO

CryptoAuthentication

60 -

Signal can be stable in either high or low

levels during extended sleep intervals.

Wake Delay to

Data Comm.

WHI

CryptoAuthentication

1 - ms Signal should be stable high for this

entire duration.

Start pulse

duration

START

CryptoAuthentication

4.1 4.34 4.56

From

CryptoAuthentication

4.62 6.0 8.6

Zero

transmission

high pulse

ZHI

CryptoAuthentication

4.1 4.34 4.56

From

CryptoAuthentication

4.62 6.0 8.6

Zero

transmission

low pulse

ZLO

CryptoAuthentication

4.1 4.34 4.56

From

CryptoAuthentication

4.62 6.0 8.6

Bit time

(1)

BIT

CryptoAuthentication

37.1 39 -

If the bit time exceeds t

TIMEOUT

then

CryptoAuthentication will enter sleep

mode and the wake token must be

resent.

From

CryptoAuthentication

46.2 60 86

Turn around

delay

TURNAROUND

From

CryptoAuthentication

46.2 60 86

CryptoAuthentication will initiate the first

low going transition after this time interval

following the end of the Transmit flag

CryptoAuthentication

46.2 60 86

After CryptoAuthentication transmits the

last bit of a block, system must wait this

interval before sending the first bit of a

flag

High side

glitch filter @

active

HIGNORE_A

CryptoAuthentication

45 ns Pulses shorter than this in width will be

ignored by the chip, regardless of its

state when active

Low side glitch

filter @ active

LIGNORE_A

CryptoAuthentication

45 ns Pulses shorter than this in width will be

ignored by the chip, regardless of its

state when active

High side

glitch filter @

sleep

HIGNORE_S

CryptoAuthentication

Pulses shorter than this in width will be

ignored by the chip when in sleep mode

Low side glitch

filter @ sleep

LIGNORE_S

CryptoAuthentication

Pulses shorter than this in width will be

ignored by the chip when in sleep mode

IO Timeout

TIMEOUT

CryptoAuthentication

7 10 13 ms Starting as soon as 7ms up to 13ms after

the initial signal transition of a token chip

will enter sleep if no complete and valid

token is received.

Watchdog

reset

WATCHDOG

CryptoAuthentication

374 500 650 ms Max. time from wake until chip is forced

into sleep mode. Refer to Watchdog

Failsafe Section 3.4

Note 1: START, ZLO, ZHI & BIT are designed to be compatible with a standard UART running at 230.4K baud for both

transmit and receive.

1 2 3 4 5 6 7 8 9 10 11 ... 20 21

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