beautypg.com

2 set commands, Ata6264 [preliminary – Atmel ATA6264 User Manual

Page 70

background image

70

4929B–AUTO–01/07

ATA6264 [Preliminary]

Figure 22-1. Timing Serial Interface

22.2

Set Commands

After a reset due to the watchdog or undervoltage, all internal control registers and decoded sig-
nals are set to their default values.

Serial interface commands other than those listed in

Table 22-2 on page 70

lead to an interrup-

tion of measurements via AMUX, cause pin UZP to be switched to tristate, and IASG sources to
be deactivated. The status of the latches does not change.

7. (< 400 ns)

5. (> 20 ns)

6. (> 20 ns)

4. (< 20 ns)

not

defined

not

defined

not defined

LSB

MSB

#16

#1

LSB

MSB

SSQ

SCLK

3. (< 20 ns)

14. (> 40 ns)

8. (< 40 ns)

9. (< 40 ns)

1. (> 100 ns)

2. (> 100 ns)

10. (> 1.5 µs)

MISO

MOSI

Table 22-2.

Set of Serial Interface Commands

Command

Latch

Hex

Description

MSByte

LSByte

7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0

Command

Option and Data

NOP

No

0000

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

Key latch

Yes

3xxx

See

Table 22-3 on

page 71

0 0 1 1 x x x x x x x x x x x x

Watchdog No

6xxx

See

Table 22-4 on

page 71

0 1 1 0 x x x x x x x x x x x x

Switch commands

Yes

9xxx

See

Table 22-5 on

page 71

1 0 0 1 x x x x x x x x x x x x

Initial programming

N/A

Axxx

See

Table 22-6 on

page 72

1 0 1 0 x x x x x x x x x x x x

Diagnosis

No

Cxxx

See

Table 22-7 on

page 72

1 1 0 0 x x x x x x x x x x x x

IASG

No

Fxxx

See

Table 22-8 on

page 73

1 1 1 1 x x x x x x x x x x x x

Test mode 1

No

55AA

0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0

Test mode 2

No

AA55

1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1

Test mode 3

No

5500

0 1 0 1 0 1 0 1 0 0 0 0 0 0 0 0

Test-mode enable

No

5A5A

0 1 0 1 1 0 1 0 0 1 0 1 1 0 1 0